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BACKGROUND AND OBJECTIVES: This paper presents an overview on nasal packing materials which are available in Germany. The current literature is analyzed whether there are robust criteria regarding use nasal packing after sinonasal surgery, whether there are fundamental and proven advantages or disadvantages of products, and what this means in clinical practice. MATERIALS AND METHODS: Selective literature analysis using the PubMed database (key words "nasal packing", "nasal tamponade", "nasal surgery", "sinonasal surgery", or "sinus surgery"), corresponding text books and resulting secondary literature. RESULTS AND CONCLUSIONS: Because of systematic methodological shortcomings, the literature does not help in the decision-making about which nasal packing should be used after which kind of sinonasal surgery. In fact, individual approaches for the many different clinical scenarios are recommended. In principle, nasal packing aims in hemostasis, should promote wound healing, and should not result in secondary morbidity. Nasal packing materials should be smooth (non-absorbable materials), inert (absorbable materials), and should not exert excessive pressure. Using non-absorbable packing entails the risk of potentially lethal aspiration and ingestion. For safety reasons inpatient control is recommended as long as this packing is in situ. With other, uncritical packing materials and in patients with special conditions, outpatient control could be justified.

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Woakes' syndrome, first reported by Edward Woakes in 1885, is an extremely rare, recurrent sinonasal polyposis leading to bone erosion of the sinus walls with consequent nasal pyramid deformity and facial disfigurement. We report a 66-year-old man who presented with severe nasal obstruction. His external nose was deformed and distended with complete obstruction of the bilateral nasal cavities by nasal polyps. The normal structure of the nose was disrupted. Thus, super-selective embolization was performed before surgery to minimize bleeding. The day after the embolization, polypectomy was performed with the navigation system. The progression was uneventful, and the patient was discharged on postoperative day 7. Pathological examination revealed inflammatory polyps with no eosinophil infiltration. Thus, we diagnosed it as Woakes' syndrome. Although there have been few reports of Woakes' syndrome in the past, these are the largest polyps reported to the best of our knowledge.

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OBJECTIVES: Approximately 20% of patients with chronic rhinosinusitis (CRS) have comorbid obstructive sleep apnea (OSA). Patients with undiagnosed OSA are at high risk for perioperative complications. The Sinonasal Outcomes Test (SNOT-22) Questionnaire is commonly administered to CRS patients, whereas OSA screening tools are less routinely employed. This study compared SNOT-22 sleep subdomain (Sleep-SNOT) scores among non-OSA CRS versus OSA-CRS patients undergoing ESS, and assessed sensitivity, specificity, and diagnostic accuracy of the Sleep-SNOT for OSA screening. METHODS: Retrospective review of patients that underwent endoscopic sinus surgery (ESS) for CRS from 2012 to 2021. Patients either carried a reported OSA diagnosis and completed the SNOT-22, or had undocumented OSA status and completed both STOP-BANG and SNOT-22. Demographics, questionnaire scores, and OSA status were collected. A receiver operating characteristic (ROC) curve assessed cutoff scores, sensitivity, and specificity of the Sleep-SNOT for OSA screening. RESULTS: Of 600 patients reviewed, 109 were included. 41% had comorbid OSA. OSA patients had a higher BMI (32.1 ± 7.7 vs. 28.35 ± 6.7 kg/m2 ; p = 0.02), Sleep-SNOT (21.96 ± 12.1 vs. 16.8 ± 11.2; p = 0.021) and STOP-BANG (3.1 ± 1.44 vs. 2.06 ± 1.27; p = 0.038) scores. A Sleep-SNOT score of 17.5 had a sensitivity of 68.9%, specificity of 55.7%, and diagnostic accuracy of 63% for OSA detection (p = 0.022). CONCLUSIONS: Sleep-SNOT scores are greater for CRS-OSA patients. The Sleep-SNOT ROC curve demonstrates a high sensitivity, specificity, and accuracy for OSA screening in CRS patients. A Sleep-SNOT score of ≥17.5 should prompt further OSA evaluation. The Sleep-SNOT may be considered as a surrogate OSA screening tool when other validated tools are not employed. LEVEL OF EVIDENCE: Retrospective chart review, Level 3 Laryngoscope, 133:2029-2034, 2023.

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OBJECTIVE: This study reviews the presentation, management, and outcomes of patients with rhinolithiasis. DATA SOURCES: An electronic database search of PubMed, SCOPUS, CINAHL, and the Cochrane Library was performed in accordance with the PRISMA 2020 updated guidelines for reporting systematic reviews. REVIEW METHODS: Case reports and case series published from 2004 to 2020 were included. Data collected included patient demographics, clinical symptoms at presentation, diagnosis, treatment, complications, and follow-up. Relevant descriptive statistics were computed using Microsoft Excel 2013 (Microsoft Corp). RESULTS: Fifty-five case reports and five case series were included (n = 122). The majority were female (60.7%). The mean age was 29.4 years (range, 4-80 years). The most common symptoms were rhinorrhea (81.1%), nasal obstruction (79.5%), nasal malodor (38.5%), and headache (27.9%). Computed tomography imaging was obtained in 109 (91.5%) cases. Concurrent rhinosinusitis (35.2%) and deviated nasal septum (28.7%) were commonly identified. Rhinoliths were commonly found in the right nostril (52.5%) and in between the inferior turbinate and nasal septum (26.9%). All rhinoliths were fully excised using endoscopic sinonasal surgery, accompanied by a septoplasty (9.2%). The nidus was identified in 27 (22.2%) patients. There were no recurrences or complications over an average follow-up of 8.5 months (range, 0.25-36 months). CONCLUSION: Rhinolithiasis is an uncommon entity of the nasal cavity and should be suspected in patients with long-standing unilateral nasal obstruction, rhinorrhea, and nasal malodor. Rigid nasal endoscopy and endoscopic sinonasal surgery are the most important methods for diagnosis and treatment, respectively.

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OBJECTIVES: Medical device-related pressure ulcer (MDRPU) is a skin or subcutaneous tissue injury caused by medical devices. Skin protectants have been used to prevent MDRPU in other fields. In endoscopic sinonasal surgery (ESNS), rigid endoscopes and forceps can cause MDRPU; however, detailed investigations have not been conducted. This study aimed to investigate the frequency of MDRPU in ESNS and the preventive effects of skin protectants METHODS: Thirty-nine patients who received ESNS and consented to study participation were randomly assigned to the "protective agent" (n = 18) or "control" (n = 21) group. MDRPU presence around the nostril was evaluated for up to 7 days post-surgically based on physical findings and subjective symptoms. The occurrence ratio and severity of MDRPU were statistically compared between the groups to evaluate the efficacy of skin protective agents. RESULTS: Stage 1 MDRPU, according to the National Pressure Ulcer Advisory Panel classification, was seen in 20.5% (8/39) of the patients, and no patient had more high-grade ulceration. On postoperative days 2 and 3, skin erythema was predominantly observed on the nasal floor, with a comparatively lower incidence in the protective agent group. Significant pain reduction was observed in the nostril's floor on postoperative days 2 and 3 in the protective agent group. CONCLUSIONS: MDRPU occurred with a relatively high frequency around the nostrils after ESNS. Protective agent use in the external nostrils was effective especially in reducing post-operative pain on the nasal floor, where tissue damage can easily occur due to device-related friction.

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OBJECTIVE: To determine how prolonged operative time (POT) impacts 30-day outcomes in patients undergoing endoscopic sinonasal surgery (ESNS). STUDY DESIGN: Retrospective study. METHODS: Data from patients who underwent ESNS (nonsinus, sinus, and extended sinus) between 2005 to 2018 were collected from the American College of Surgeons National Surgical Quality Improvement database. Univariate and multivariate analyses were performed to evaluate the effect of POT on postoperative outcomes. RESULTS: Among 1,994 ESNS cases, 495 nonsinus procedures, 1,191 sinus procedures, and 308 extended sinus procedures were identified. Median OT was 90 minutes (interquartile range [IQR], 51-165 minutes) for nonsinus procedures, 113 minutes (IQR, 66-189 minutes) for sinus procedures, and 187 minutes (IQR, 137-251 minutes) for extended sinus procedures. Other than older age (P = .008), POT was not significantly associated with baseline demographics and comorbidities for patients undergoing non-sinus procedures. Older age (P < .001), White and Black race (P < .001), ASA physical classifications III or IV (P < .001), and several preoperative comorbidities, including obesity (P = .045), and hypertension (P < .001) were associated with POT for sinus procedures. Older age (P = .030), male sex (P = .010), and lower body mass index (P = .004) were associated with POT for extended sinus procedures. After risk-adjustment, POT was independently associated with prolonged hospital stay (LOS) for all procedure categories, and associated with overall surgical complications and postoperative bleeding for sinus and extended sinus procedures specifically. CONCLUSION: POT is independently associated with several adverse outcomes following ESNS, including prolonged LOS, overall surgical complications, and bleeding. Preoperative planning should include optimizing modifiable patient risk factors for POT and identifying surgeon-specific factors to enhance surgical efficiency. LEVEL OF EVIDENCE: 4 Laryngoscope, 133:51-58, 2023.

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BACKGROUND: Patients with severe chronic rhinosinusitis with nasal polyps (CRSwNP) often require repeat sinus surgery. Mepolizumab reduced the need for sinus surgery in the SYNAPSE trial; this analysis sought to provide a more in-depth assessment of surgery endpoints in SYNAPSE. METHODS: SYNAPSE was a double-blind Phase III trial (NCT03085797) in adults with recurrent, refractory, severe, CRSwNP eligible for repeat sinus surgery despite standard of care treatments and previous surgery. Patients were randomized (1:1) to mepolizumab 100 mg subcutaneously or placebo, plus standard of care, every 4 weeks for 52 weeks. Time to first inclusion on a waiting list for sinus surgery and time to first actual sinus surgery (both up to week 52) were assessed; the latter endpoint was also analyzed post hoc according to time since last sinus surgery before study screening and baseline blood eosinophil count. RESULTS: Among 407 patients (mepolizumab: 206; placebo: 201), mepolizumab versus placebo reduced the risk of being included on a waiting list for sinus surgery (week 52 Kaplan-Meier probability estimate [95% confidence interval]: 13.9% [9.8%, 19.5%] vs. 28.5% [22.7%, 35.4%]). Mepolizumab versus placebo reduced the risk of sinus surgery irrespective of time (<3 vs ≥3 years) since patients' last sinus surgery prior to study screening (hazard ratios [95% confidence intervals] 0.28 [0.09, 0.84] and 0.50 [0.26, 0.98], respectively) and baseline blood eosinophil count. CONCLUSIONS: Mepolizumab reduced the risk of further sinus surgery in patients with recurrent, refractory, severe CRSwNP, irrespective of the patient baseline characteristics assessed.

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Although absorbable nasal packings have been abundantly used in the recent time, the conventional packings are still used in different sinonasal surgeries in the various parts of the globe due to their lower cost. To compare the effectiveness of the balloon tamponade (Rapid Rhino) with Merocel nasal pack in sinonasal diseases. This study was conducted from July 2018 to July 2019 in a tertiary care referral hospital. Rapid Rhino and Merocel were put in 30 patients and 31 patients, respectively. Pain, bleeding, and mucosal healing was evaluated and compared between two groups postoperatively. The reduction in the pain and postoperative bleeding was significant with balloon tamponade (Rapid Rhino) compared to the Merocel (p < .05). Although insignificant (p > 0.05), patients with balloon tamponade nasal packs had less crusting and synechia in the postoperative period. Balloon tamponade (Rapid Rhino) nasal pack can be a better alternative to the Merocel nasal pack in reducing postoperative pain, bleeding, and mucosal damage.

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Objectives: Olfactory dysfunction is a common complaint in patients with chronic rhinosinusitis (CRS). The study aimed to evaluate the effectiveness of olfactory training (OT) in patients with CRS after sinonasal surgery. Methods: We enrolled 111 patients with CRS who underwent sinonasal surgery. Prior to surgery and 3 months after starting OT, the participants were assessed by both an olfactory function test and endoscopy. The Korean version of the Sniffin' Stick II (KVSS-II) was used to perform the olfactory function test. Over the course of 3 months, five odorants were used in OT (rose, lemon, cinnamon, orange, and peach). Results: Over a 12-week duration, 37% of the participants in the OT group showed clinically relevant increase in olfactory function. The OT group had significantly higher olfactory outcomes for the total KVSS-II and identification scores than the non-OT group between the initial and follow-up assessments. The initial score influenced the degree of olfactory improvement after OT. Conclusions: Patients with OT exhibited significantly higher total KVSS-II scores compared with non-OT patients following sinonasal surgery; in particular, the odor identification score was different between the two groups. The results of this study demonstrated that a 12-week period of repeated short-term exposure to various odors could be useful in enhancing olfactory activity in patients who underwent sinonasal surgery for the improvement of sensory-neural olfactory impairment. Level of evidence: 2c.

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Resumen Durante la cirugía endoscópica nasosinusal, la sección inadvertida y retracción hacia la órbita de la arteria etmoidal anterior (AEA) es el mecanismo habitual del hematoma orbitario (HO); éste se manifiesta con proptosis, dolor y déficit visual potencialmente irreversible. El déficit visual es secundario a isquemia del nervio óptico por aumento de la presión intraocular, siendo suficientes treinta minutos para que ocurra daño visual permanente. Por sus secuelas el tratamiento del HO debe ser rápido y agresivo. Presentamos el caso de un varón de 72 años con diagnóstico de rinosinusitis crónica con pólipos nasales refractaria a tratamiento médico que se sometió a cirugía endoscópica nasal y que desarrolló en el posoperatorio inmediato con un HO. Se manejó precozmente con cantotomía-cantolisis, descompresión orbitaria medial endoscópica y control vascular de la AEA. El paciente evoluciona favorablemente, sin déficit visual. En este artículo se discutirán el diagnóstico y manejo oportunos del hematoma orbitario iatrogénico.

Abstract During endoscopic sinonasal surgery, inadvertent section of the anterior ethmoidal artery (AEA) with retraction into the orbit is the usual mechanism of orbital hematoma (OH), leading to proptosis, pain, and potentially irreversible visual loss. Thirty minutes is sufficient for retinal ischemia and permanent visual loss. The explanation for blindness is due to increased intraorbital pressure. The treatment of iatrogenic HO must be quick and aggressive, because if it is not managed in time, it can cause a permanent visual deficit. We present the case of a 72-year-old man with a diagnosis of chronic rhinosinusitis with nasal polyps refractory to medical treatment who underwent nasal endoscopic surgery, evolving in the immediate postoperative period with an HO, requiring canthotomy - cantolysis and early surgical reintervention for endoscopic medial orbital decompression and vascular control of AEA. The patient evolves favorably, without visual deficit. This article will discuss the timely diagnosis and management of iatrogenic orbital hematoma.

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OBJECTIVES/HYPOTHESIS: To identify factors that may increase the risk of unplanned admission following elective outpatient endoscopic sinonasal surgery (ESS). STUDY DESIGN: Retrospective analysis of the National Surgical Quality Improvement Program (NSQIP). METHODS: All cases of ESS were extracted from the 2010 to 2018 NSQIP database using Current Procedural Terminology codes. Only cases coded as outpatient, elective, and nonemergent procedures were included. Unplanned admissions were defined as cases with a total hospital stay of 1 day or more. Univariate and multivariate analyses were performed to identify variables that independently predicted unanticipated admission. RESULTS: A total of 971 cases met inclusion criteria, of which 274 (28.2%) were unanticipated admissions. Patients in the unplanned admission group were more likely to be older (46.8 vs. 41.1 years, P < .001), male (57.7% vs. 48.4%, P = .009), obese (54.8% vs. 43.8%, P = .003), and have hypertension (35.0% vs. 25.0%, P = .002). Unplanned admitted patients were also more likely to be included under American Society of Anesthesiologists (ASA) classification III-IV (43.1% vs. 27.2%, P < .001). There were no significant differences in race, smoking, diabetes, or chronic steroid use. Unplanned admitted patients had a higher rate of surgical complications (2.9% vs. 1.0%, P = .041). Upon multivariate analysis, independent preoperative risk factors for unplanned admission included age (OR: 1.018, P = .002), male gender (OR: 1.415, P = .025), obesity (OR: 1.527, P = .008), and ASA III-IV (OR 1.501, P = .018). CONCLUSIONS: Factors independently associated with unplanned admission following outpatient ESS were older age, male gender, obesity, and higher ASA. Identification of patients at risk may reduce unanticipated hospital admission after ESS. LEVEL OF EVIDENCE: 4 Laryngoscope, 132:518-522, 2022.

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BACKGROUND: Chronic rhinosinusitis with nasal polyps (CRSwNP) is a heterogeneous disease with variable underlying pathophysiologies. Numerous patient factors have been linked to differences in disease severity, control, and response to treatment, including asthma status, aspirin sensitivity, previous sinonasal surgery, and blood eosinophil levels. OBJECTIVE: The present study examines the efficacy of the anti-immunoglobulin E therapy, omalizumab, versus placebo in patients with CRSwNP from the replicate POLYP 1 (NCT03280550) and POLYP 2 (NCT03280537) trials, grouped by inherent patient characteristics to determine the response to therapy. METHODS: Patients in prespecified subgroups from POLYP 1 and POLYP 2 (studies pooled for analysis) were examined. Subgroups included blood eosinophil count at baseline (>300 or ≤300 cells/µL), previous sinonasal surgery (yes or no), asthma status (yes or no), and aspirin sensitivity status (yes or no). Subgroups were examined for subgroup-specific adjusted mean difference (95% confidence interval [CI]) (omalizumab-placebo) in change from baseline at week 24 in Nasal Congestion Score (NCS), Nasal Polyp Score (NPS), Sino-Nasal Outcome Test-22 (SNOT-22), Total Nasal Symptom Score (TNSS), and University of Pennsylvania Smell Identification Test (UPSIT). RESULTS: Adjusted mean difference (95% CI) (omalizumab-placebo) in NCS, NPS, SNOT-22, TNSS, and UPSIT change from baseline at week 24 consistently favored omalizumab treatment over placebo in patients with blood eosinophil count >300 and ≤300 cells/µL, with or without previous sinonasal surgery, asthma, and aspirin sensitivity. CONCLUSION: Together, these data suggest broad efficacy of omalizumab across clinical and patient-reported outcomes in patients with CRSwNP, independent of the underlying patient factors examined, including those with high eosinophil levels and those who have undergone previous surgery, which are associated with high recurrence. CLINICAL TRIAL REGISTRATION: ClinicalTrials.gov identifiers: POLYP 1: ClinicalTrials.gov identifier NCT03280550 (https://clinicaltrials.gov/ct2/show/NCT03280550); POLYP 2: ClinicalTrials.gov identifier NCT03280537 (https://clinicaltrials.gov/ct2/show/NCT03280537).

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BACKGROUND: Although it is extremely necessary to reduce the number of opioids taken postoperatively after sinonasal surgery, this is the subject of controversial discussion. OBJECTIVES: The objective of this study was to identify factors that predict higher postoperative pain scores (PPS) and the need for opioid analgesics after sinonasal surgery. MATERIAL AND METHODS: This was a retrospective study of n = 492 patients who underwent functional endoscopic sinus surgery (FESS), septoplasty or a combination of both in the Otolaryngology Department in Erlangen between January and December 2018. Postoperative pain using the numeric rating scale and the postoperative need for non-opioid and opioid analgesics in relation to demographic and surgical parameters were evaluated. RESULTS: Significant predictors for a higher pain score were depression (p = .009) and female gender (p < .001). A significant predictor of the need for postoperative opioids was the female gender (p < .001), whereas FESS alone showed a significantly lower need for opioids (p = .035) and a significantly lower PPS compared to septoplasty (p < .001). CONCLUSIONS AND SIGNIFICANCE: The study identified risk factors for a higher PPS and the need for opioids. The results indicated that reducing postoperative opioids might be possible in patients without these risk factors and might help guide individualized postoperative therapy.

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Posttreatment imaging evaluation of sinuses encompasses a wide gamut of procedures, ranging from endoscopic procedures for sinonasal inflammatory diseases to markedly radical surgeries for malignant neoplasms (with or without reconstructions), as well as providing access for surgeries involving the anterior and central skull base. Advances in both techniques and devices have expanded the use of endoscopic approaches in managing both benign and malignant lesions, in addition to being the primary surgical method for treating all medically refractive sinonasal inflammatory disorders. Familiarity with the complex anatomy in the sinonasal region and knowledge of the various procedures is indispensable in interpreting these imaging studies.

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INTRODUCTION: Woakes' syndrome is a rare condition commonly defined as recurrent sinonasal polyposis with consecutive destruction of the nasal pyramid. Till now, only a few cases have been reported in the literature. The purpose of this paper is to present the features of woakes' syndrome through two new clinical cases, adding some valuable insight to the recently reported cases. CASE REPORT: We report a series of two consecutive adults male and female patients, aged 55 and 58 years, with Samter's triad, who presented recurrent nasal polyposis and progressive broadening of the nasal dorsum. Facial CT showed in both patients the same radiologic pattern of nasal and paranasal cavities obliteration with nasal bone deformation. Both patients underwent functional endoscopic sinus surgery and correction of the bony nasal vault deformity without osteotomies. At 3 months follow-up, the nasal air passage remained free and aesthetic outcomes were observed. DISCUSSION: having been described over 130 years ago, the etiology of woakes' syndrome remains unclear. Treatment includes topical treatment and sinonasal surgery. Surgical treatment of the nasal dorsum deformity is rarely addressed. CONCLUSION: These observations suggest that the external nose deformity may be successfully corrected by digital compression, in combination with endoscopic sinus surgery.

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OBJECTIVE: To determine the efficacy of preoperative gabapentin on patient-reported pain levels and postoperative opioid requirements following sinonasal surgery. STUDY DESIGN: Retrospective review. SETTING: Academic institution. METHODS: Patients undergoing sinonasal surgery between July 2019 and January 2020 were followed. Groups were divided into those that received 600 mg of oral gabapentin 1 hour preoperatively (gabapentin) and those that did not (control). Postoperatively, each patient was counseled to use acetaminophen, ibuprofen, and oxycodone as needed for pain control. Patients completed a daily postoperative pain and medication log. Pain was measured by the visual analog scale (VAS) and opioid use by morphine equivalent dose (MED). Chi-square test and Wilcoxon test were used for data analysis. RESULTS: Fifty-seven patients were included (control, n = 28; gabapentin, n = 29). There was no significant difference in age, sex, or baseline Sinonasal Outcome Test-22 scores between the groups. The total MED, postoperative day (POD) 1-2 MED, POD 3-4 MED, and POD 5-6 MED did not differ significantly between the control (17.9, 12.2, 4.6, 1.5) and gabapentin (19.0, 8.9, 7.2, 3.5) groups (P = .98, .25, .16, .44). The mean daily VAS score did not differ significantly between the control (3.1) and gabapentin (2.8) groups (P = .81). The mean daily VAS score decreased significantly in both groups with each successive POD (P = .004). CONCLUSION: Preoperative gabapentin did not significantly reduce postoperative pain or opioid use. Postoperative discomfort following sinonasal surgery is mild, and opioid intake is minimal.

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OBJECTIVES: An increasing proportion of patients who are candidates for endoscopic sinus surgery can be treated as an outpatient. A preoperative risk assessment is needed to evaluate eligibility for day surgery. This study analyses the effectiveness of a risk assessment scoring system which examines medical, procedure-related, and socioeconomic factors. DESIGN: Prospective multicenter study. SETTING: Three center study including Klinik Hirslanden, Zurich, Switzerland, Luzerner Kantonsspital, Lucerne, Switzerland and HNO-Klinik München-Bogenhausen, Munich, Germany. PARTICIPANTS: Patients with endoscopic sinus procedures between January 1st, 2017 and December 31st, 2018. MAIN OUTCOME MEASURES: The "day surgery risk score" consisted of three subgroups with medical, procedure-related and socioeconomic risk factors were assessed to determine if these predicted the severity of postoperative complications. RESULTS: Three-hundred and one patients who underwent endoscopic sinus surgery were included. The score resulted in a median value of 5 [5, 5]. In the Receiver-Operating Curve (ROC-the true-positive rate against the false-positive rate), the Area Under the Curve (AUC) was 0.59 with 95% confidence interval from 0.49 to 0.69, indicating that the "day surgery risk score" may be no better at predicting the likelihood of a complication than a random classification model. CONCLUSIONS: The "day surgery risk score" is a straightforward risk assessment which combines medical, procedure-related, and socioeconomic factors. The score is easy to use but in trying to decide whether a patient is eligible for ambulatory endoscopic sinus surgery it did not predict whether a complication was more likely to occur.

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OBJECTIVE: To describe our strategy for the management of odontogenic cysts involving the maxillary sinus, and to define the role of transnasal endoscopic sinus surgery in the treatment algorithm. METHODS: A retrospective study was conducted. Included were all consecutive patients with odontogenic cysts involving the maxillary sinus who were treated in a single medical center between 2011 and 2019. Their medical records were reviewed for demographic data, preoperative presentation, surgical approach, final pathology, and postoperative course. Odontogenic cysts were classified as small or large according to maxillary sinus extension within or beyond the alveolar recess, respectively. RESULTS: A total of 30 patients with odontogenic cysts involving the maxillary sinus were treated by a team of maxillofacial and endoscopic sinus surgeons during the study period. There were 11 cases of dentigerous cysts, 11 radicular cysts, seven odontogenic keratocysts (OKCs), and one glandular cyst. Sixteen cases were managed by transnasal endoscopic sinus surgery alone and 14 were managed by a combined intraoral and endoscopic sinus surgery approach. A total of 22 patients had large cysts and total resection was achieved in 20 of them. There was one case of OKC recurrence during an average follow-up of 31 months. No major complications were recorded. CONCLUSIONS: The endoscopic approach can serve as an alternative to the transalveolar or lateral window approach. The endoscopic approach is associated with low morbidity and low recurrence rates.

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INTRODUCTION: Supernumerary teeth are frequently reported in dental clinical practice; however, eruption in nasal cavities and paranasal sinuses is an extremely rare clinical entity. CASE REPORT: We report two cases with a history of recurrent nasal discharge and obstruction. In both cases, clinical and radiological findings confirmed the presence of an inverted supernumerary tooth erupted in the sinonasal cavities (i.e., the right nasal fossa and left maxillary sinus, respectively). We managed the cases with transnasal endoscopic approach. A survey of the English literature identified 69 documented cases with intranasal supernumerary teeth within January 1st, 1886 to December 31st, 2017. CONCLUSION: Inverted supernumerary teeth should be considered among the potential causes of unilateral nasal obstruction and rhinosinusitis and included in differential diagnoses among the fibro-osseous lesions of the sinonasal cavities.