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We report the clinical case of a patient with acute myocardial infarction due to coronary stent compression as first manifestation of a large thymoma. The patient underwent a coronarography and thrombus aspiration + plain old balloon angioplasty restoring the stent patency. The mass resection was performed through left robotic-assisted thoracic surgery (RATS), resulting in a type A thymoma pT1a, IIb Masaoka-Koga. An uncommon presentation led to early diagnosis and treatment of a thymoma with both oncological and functional significance.

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Thymoma is one of the thymic epithelial tumors arising from the thymic epithelial cells of a variety of animal species including cat, cattle, dog, goat, horse, and pig. The cancer cells of thymoma are always localized within thymus. Feline thymoma was usually identified in the cranial mediastinum of elder cats. In this report, we present the full diagnostic characteristics of a young cat with a cranial mediastinal mass diagnosed as a cystic type B1 thymoma. A 3-year-old male neutered domestic short-haired cat was referred for further diagnosis due to the shortness of breath and pleural accumulation. One single cystic extra-pericardial mass was seen and the boundary between the mass and the surrounding tissue was clearly demarcated in three-view thoracic radiographs. Ultrasound showed pleural effusion and intra-thoracic mass. Pleural fluid biochemistry showed high level of triglycerides and complete blood count revealed the elevated number of basophils and high level of feline serum amyloid A (fSAA). Pleural effusion sediment cytology showed a large number of round cells, mainly small lymphocytes, as well as a moderate number of neutrophils and a small number of large lymphocytes. The high level of triglycerides in pleural fluid instead of serum and high level of fSAA seem to provide informative clues to the diagnosis of thymoma and are worthy of further investigation.

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BACKGROUND: Oligodendroglioma is a part of diffusely infiltrating gliomas with poorly understood pathological aspect often manifesting histologic overlap among other intracranial tumors, though it only consisted 5% in total. Its occurrences among pediatric is a rare finding, constituted <1% of total brain tumors in the population, but with molecularly distinct properties to its adult version. Metachronous pediatric oligodendroglioma plus mediastinal mass is even more uncommon, as history of double primary tumor serves as a groundbreaking point in understanding individual pathology. This study reports a rare case of pediatric oligodendroglioma with history of mediastinal mass. CASE DESCRIPTION: This study reports a rare case of pediatric oligodendroglioma with history of mediastinal mass. A 10-year-old female presented to our emergency department with altered consciousness level in the past couple of weeks, and progressively worsening for 3 days. Moreover, she withstands a yearlong headache, plus continuously worsens weakness on the left side of the extremities for 6 months, right sided weakness of face and visual disturbances appeared at least 4 months prior presentation; no seizures were observed. History of pericardial effusion due to mediastinal mass was also recorded in 3 years before with history of pericardial tapping, with cytology showed malignant lesion; with history of 5 times radiotherapy cycle for treatment purpose, and patient discontinued therapy due to loss of follow up. Non-contrast head computed tomography (CT)-scan observed a mix-density lesion on the frontotemporoparietal region with calcification. On magnetic resonance imaging (MRI), mix-intensity lesion was found suggesting a glioma lesion. Patient underwent removal of tumor, with gross tumor removal was achieved. Histopathology result of oligodendroglioma was found. CONCLUSIONS: The management of pediatric oligodendroglioma in our case involves wide range of discipline to elaborate its interaction with prior metachronous mediastinal mass, and findings of double primary tumor should raise any suspicion for any tumor-related genetic mutations.

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We present a rare case of mediastinal capillary hemangioma in a 54-year-old female. She presented with back pain in the left suprascapular region, and the chest radiograph revealed left pleural effusion. On further workup with high-resolution computed tomography (CT) chest, a hypervascular pleural-based neoplastic lesion in the left upper hemithorax with gross left pleural effusion and subtotal collapse of the left lung was identified. 18F-fluorodeoxyglucose positron emission tomography/CT was suggestive of a weakly metabolic well-defined pleural-based soft tissue lesion in the left upper hemithorax along the mediastinal side. Neuroendocrine tumor was suspected. 68Ga-DOTATATE PET/CT was advised, which showed intense uptake in the lesion. The mass was resected completely. Histopathological examination established the final diagnosis as benign vascular tumor consistent with a capillary hemangioma.

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Mature mediastinal teratoma is a rare benign tumor in children. Few cases have been reported in the literature. Moreover, this tumor is often characterized by slow growth, reaching a large volume and frequently causing nonspecific symptoms, making its diagnosis more difficult. It raises the question of differential diagnosis with malignant mediastinal tumors in pediatric patients, requiring histological confirmation by biopsy or excision. The purpose of this article is to report an atypical clinical finding characterized by spinal deformity, and to contribute to medical knowledge concerning this uncommon pediatric tumor.

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Managing mediastinal masses during anesthesia presents formidable challenges, particularly in pediatric patients undergoing procedures such as tru-cut biopsy. These masses, both benign and malignant, can compress vital structures, leading to life-threatening complications. This article explores the complexities of managing anesthesia in patients with mediastinal masses, emphasizing the importance of meticulous preoperative assessment, understanding the relationship between the mass and surrounding anatomy, and employing lifesaving techniques such as inhalation induction and awake intubation. In the first case, a seven-year-old boy with a large heterogeneous mediastinal mass causing left lung collapse and compression of major vessels underwent a tru-cut biopsy under spontaneous general anesthesia. The procedure was uneventful, and the mass was diagnosed as neuroblastoma. In the second case, a 13-year-old boy with a mediastinal mass causing compression of the trachea and major vessels presented with respiratory distress and was managed with a tru-cut biopsy under local anesthesia with ultrasound guidance. The mass was diagnosed as acute T-cell lymphoblastic lymphoma. In the third case, a 14-year-old girl with a large mediastinal mass causing compression of the pulmonary trunk and major vessels experienced airway compromise during the biopsy, necessitating emergency intubation and repositioning. The mass was diagnosed as Hodgkin lymphoma. Mediastinal masses can cause significant compression of the trachea, bronchi, and major vessels, leading to a range of clinical symptoms. Effective management requires thorough preoperative evaluation, planning for potential airway emergencies, and collaboration with surgical teams. Case reviews highlight the variability of airway dynamics and the necessity of positive pressure ventilation and vigilant postoperative monitoring. Comprehensive pre-procedural assessment, preparedness for airway emergencies, and skilled anesthesia teams are crucial for managing pediatric patients with mediastinal masses. These cases underscore the complexities and emphasize the importance of careful planning and proactive measures to ensure successful outcomes and minimize risks during anesthesia induction and diagnostic procedures.

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Thyroglossal duct cysts (TGDCs) are congenital anomalies that originate from the embryonic thyroglossal duct. Here, we present an atypical case of a thyroglossal cyst of the superior mediastinum with a small cervical extension. A male patient presenting with vague symptoms of retrosternal discomfort and cough was evaluated with computed tomography (CT) thorax. It was revealed to be a mediastinal mass. An excision biopsy of the mass under general anesthesia revealed it to be a thyroglossal duct cyst. TGDC of the mediastinum is extremely rare. To the best of our knowledge, this is the first case reported in a patient of Indian origin and the fifth such case reported worldwide.

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Background: Parathyroidectomy remains the only definitive cure for primary hyperparathyroidism (PHPT). In rare cases, ectopic hyperfunctioning glands are located in the mediastinum, necessitating a thoracic surgical approach. The objective of this project was to review a single high-volume institutional experience of this presentation, with specific attention to the use of a robotic-assisted thoracic surgery (RATS) approach. Methods: This was a single-center, 5-year retrospective cohort study. All patients who underwent RATS mediastinal mass resection (MMR) for PHPT at the University of Colorado Anschutz Medical Campus were targeted for inclusion. Patient cases were reviewed for demographics, history, operative data, laboratory values, and postoperative course. Results: Eight patients underwent RATS-MMR for PHPT between 2018-2023. Median [interquartile range] operative time was 178 [138-213] minutes, and length of stay was 2.0 [1.5-2.0] days. One patient experienced post-operative chylothorax requiring dietary modification. There were no other 30-day complications or readmissions. Final pathology confirmed intrathymic parathyroid tissue in all patients. All patients achieved cure of PHPT. Conclusions: The robotic-assisted approach has low morbidity and associated hospital length of stay and can be safely used to cure PHPT. As this is a rare pathology with an infrequently utilized surgical approach, it is important to critically discuss the diagnostic evaluation and operative course, aimed at educating the thoracic surgeon who may encounter and assist in the management of these patients.

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Ectopic thyroid tissue is rare in the general population and more prevalent in people who have existing thyroid disease. Common anatomical sites of ectopic thyroid tissue include the lateral cervical region, thyroglossal duct, mediastinum, lingual, sublingual, and submandibular region. Intrathymic ectopic thyroid tissue is exceedingly rare. The purpose of this report is to describe one such case in a 52-year-old African-American female with Graves' disease. The patient presented for a physical exam and follow-up. During the exam, an incidental mediastinal mass was discovered, which was evaluated by imaging studies and subsequently was resected. Histologically, the mass was composed of variable-sized thyroid follicles lined by a monolayer of cuboidal to columnar follicular epithelial cells and filled with eosinophilic colloid, surrounded by a rim of unremarkable compressed thymic tissue.

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While excision for parathyroid cysts remains as the standard of management, surgical approach in the context of massive cervicomediastinal parathyroid cysts can be challenging. We report a rare giant parathyroid cyst in anterior mediastinum successfully resected from a simple standard Kocher's collar incision. Various surgical approach will also be deliberated.

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Primary thymic lymphoepithelial carcinoma is a rare neoplasm of the mediastinum. The recognition of clinical, radiologic, and pathologic features can help in making an accurate diagnosis of this aggressive tumor at the earliest.Here, we present the radiologic and pathologic findings of an anterior mediastinal mass in a 44-year-old man, which turned out to be a poorly differentiated squamous cell carcinoma of thymic origin, also known as lymphoepithelioma-like thymic carcinoma.

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BACKGROUND: Giant anterior mediastinal masses in infants are one of the most challenging cases faced in pediatric anesthesia practice. They can pose unique challenges for resection such as cardiovascular collapse on induction of anesthesia and injury to surrounding structures that maybe compressed or displaced. Principles that must be followed and kept in mind during removal of giant mediastinal mass include appropriate diagnostic imaging to define mass extent, airway control during induction, a multidisciplinary team approach including cardiothoracic for sternotomy, cannulation to institute cardiopulmonary bypass, otolaryngology for rigid bronchoscopy, preservation of neurovascular structure, and complete resection whenever possible. Our patient had a mass that weighed twice his whole body weight. CASE PRESENTATION: Here we present a 3-month-old Middle Eastern infant weighing 3.2 kg with a large congenital teratoma who presented to the emergency room with cyanosis and respiratory distress. During his hospital course, he underwent three procedures, two of them under light-to-moderate sedation: a diagnostic computer tomography scan followed by mass content drainage by interventional radiology (Figs. 1, 2). On the third day, he had a thoracotomy with complete tumor resection under general anesthesia with the help of an epidural for pain control (Fig. 3). The resected tumor weighed 2.5 kg, which was equal to twice the patient's total body weight (Fig. 4). After the surgery, he was extubated in the operating room and discharged home 3 days later. Fig. 1 Anterior-posterior chest x-ray showing the anterior mediastinal mass (AMM) Fig. 2 Cross-section computed tomography (CT) showing large anterior mediastinal mass (AMM) Fig. 3 Gross anatomy of the tumor before resection Fig. 4 Gross anatomy of the removed tumor CONCLUSION: Anterior mediastinal mass patients can be challenging for the anesthesiologist. They need meticulous thorough perioperative assessment to determine the extent of compression on major intramediastinal structures and to predict the complications. Planning by multidisciplinary team and discussion with the family is important. These types of cases should be preferably operated on by an experienced team in a well-equipped operation room in tertiary care institutes.

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Myocardial revascularization in patients presenting with an anterior mediastinal mass poses considerable challenges. In this report, we outline two cases involving patients with anterior mediastinal masses who underwent surgical resection alongside concurrent myocardial revascularization. One patient underwent coronary artery bypass graft surgery, while the other was treated by percutaneous coronary intervention with drug-eluting stent placement. Both patients fully recovered from the relative procedures and were discharged within two weeks post-surgery, ultimately diagnosed with thymoma. The concomitant intervention offered the advantage of promptly addressing both conditions, and it was performed safely through a collaborative multidisciplinary effort.

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Ectopic thyroid tissue (ETT) is a rare finding on mediastinoscopy which could be attributed to a defect early in thyroid gland embryogenesis, as the glandular tissue makes its way to a pre-tracheal position. The more distal the location of the ectopic tissue from typically neighboring structures, such as the recurrent laryngeal nerves or the superior thyroid artery, the greater the likelihood for issues such as hyperthyroidism, compression of nearby neurovascular structures, and malignancy. Depending on the exact anatomical location and hormonal activity of the tissue, management can range from administration of iodine to surgical resection. This report discusses a case of ETT discovered during the resection of an anterior mediastinal mass, possible treatment, and management plans.

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Bronchogenic cysts (BCs) are a congenital anomaly, forming fluid-filled sacs in the bronchial tree during fetal development, and are relatively rare in adults. Patients with large BCs in the mediastinum presenting with severe tracheal compression pose a significant challenge to anesthesiologists. The confined and narrow space of the mediastinum exacerbates the compression effect on surrounding structures, leading to potential respiratory or cardiovascular collapse during anesthesia and postoperatively. Herein, we report the stepwise anesthetic management of a patient with a BC in the paratracheal region of superior mediastinum, causing near-complete tracheal compression, scheduled for right posterolateral thoracotomy and tumor excision. The patient presented with dyspnea, chest pain, cough, and severe tracheal compression necessitating meticulous airway management. Utilizing awake fiberoptic intubation with a single-lumen endotracheal tube and one-lung ventilation facilitated by an EZ bronchial blocker, we successfully secured the airway, provided ideal surgical conditions through lung deflation, and ensured perioperative safety. This case underscores the crucial role of comprehending the underlying pathophysiology, anticipating complications, and meticulously planning, preparing, and executing strategies for airway management and perioperative care in patients with mediastinal masses leading to significant tracheal compression.

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A middle-aged gentleman presented with dyspnea and hypotension, accompanied by an anterior mediastinal mass infiltrating the anterior chest wall and a moderate to large pericardial effusion, which upon evaluation revealed chylous fluid. Further investigation diagnosed him with right lung adenocarcinoma infiltrating the chest wall, staged at T4N3M1. The patient subsequently developed cardiac tamponade, necessitating immediate medical intervention. Management of the patient's cardiac tamponade involved pericardiocentesis via an indwelling pericardial catheter, allowing continuous drainage of the chylous fluid. Additionally, the patient was placed on a medium-chain triglyceride diet (MCTD) to reduce chyle production. These interventions resulted in significant symptomatic improvement, stabilizing the patient's hemodynamic status, and alleviating the immediate life-threatening condition. This case highlights the clinical challenges posed by rare presentations such as chylopericardium secondary to malignancy and emphasizes the importance of comprehensive diagnostic evaluation and prompt therapeutic management. The successful outcome, achieved through a combination of pericardial drainage and dietary modifications, underscores the critical role of a conservative approach in managing complex oncological cases with acute complications.

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Anterior mediastinal masses, including thymomas, can present with thoracic symptoms or paraneoplastic syndromes, especially in adults over 40. Diagnosis involves imaging and biopsy, and treatment includes surgical resection and chemotherapy, depending on the stage. A 31-year-old male, with a history of alcohol use disorder and a former smoker, presented with increasing heartburn, shortness of breath, left shoulder pain, and chest pain. Imaging revealed an anterior mediastinal mass with pleural thickening and a small effusion. A biopsy confirmed a B2-type thymoma. Initial treatment included cyclophosphamide, doxorubicin, and cisplatin, resulting in significant tumor reduction and pleural effusion resolution. The patient underwent planned surgical resection following neoadjuvant chemotherapy. This case highlights the complexity of advanced thymoma treatment and the effectiveness of neoadjuvant chemotherapy in reducing tumor burden, the associated effusions, and improving outcomes. Continuous follow-up and further studies are essential to optimize treatment protocols for advanced thymoma.

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BACKGROUND: Traditional posterolateral thoracotomy (PLT) is a painful and potentially morbid operation associated with an extensive recovery and a long, unsightly scar. In contrast, vertical thoracotomy (VT) is designed to spare muscles, avoid skin flaps, and minimize incision length, thereby limiting postoperative pain, hastening recovery, and improving scar cosmesis. METHODS: We reviewed children aged 1-21 that underwent PLT and VT at our institution from 1/1/2013-12/1/2023. We analyzed demographic data, operative details, and clinical outcomes with special attention paid to total oral morphine equivalents (OME), time to ambulation, and wound complications. RESULTS: We identified 105 patients who underwent PLT and 74 who underwent VT. Both groups were heterogeneous with a greater proportion of oncology patients that received wedge resection in the VT group and congenital lung lesions that received lobectomy in the PLT group. VT patients tended to be older and heavier than PLT patients. Patients who underwent VT demonstrated improved time to ambulation (1.4 ± 0.3 vs 3.0 ± 1.4 days, p = 0.037) and oral morphine equivalent requirements (1.4 ± 0.4mgOME/kg vs 3.5 ± 1.8mgOME/kg, p = 0.035) compared to those who underwent PLT. Additionally, no patients in the VT group required division of the serratus or latissimus, compared to 8 (8%) in the PLT group (p = 0.004). CONCLUSION: Muscle-sparing vertical thoracotomy provides excellent exposure for most intrathoracic pediatric operations, results in a cosmetically acceptable scar that is easily hidden by the upper arm, may reduce the frequency of division of the latissimus and serratus, and does not worsen time to ambulation or post-operative opioid requirements. LEVEL OF EVIDENCE: III.

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Ewing sarcoma is one of the small round blue cell tumors of childhood that typically affects bone. Recently, a subgroup of undifferentiated round-cell sarcomas has been genetically identified as BCOR (B-cell Line 6 Corepressor)-altered sarcomas (BAS). We present a case of a six-year-old male child who presented with a chief complaint of shortness of breath and tachypnea and was found to have a large mediastinal mass concerning sarcoma. Preliminary biopsy results were positive for small round blue cells, possibly Ewing sarcoma. After six cycles of chemotherapy, with subsequent shrinkage of mediastinal mass, the patient was able to undergo wedge resection and excision of the mass with en bloc resection of the fifth and sixth rib, preserving his right lung. Final tissue pathology was positive for BAS. There have been only four reported cases of BAS of the chest wall and zero reported cases of primary tumor presentation of the lung, making this a rare presentation of the disease.

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Background and Objective: Giant anterior mediastinal tumors sometimes may cause circulatory collapse and respiratory failure, known as mediastinal mass syndrome (MMS). The prediction and prevention of MMS is challenging. The aim of this study is to summarize the evaluation methods for MMS and formulate treatment strategies for giant anterior mediastinal tumors. Methods: We performed a thorough analysis of recent international literature on giant anterior mediastinal tumors (>10 cm in diameter) and MMS published in the PubMed database. The search spanned the duration of the preceding 10 years from August 19, 2023, and only studies published in English were included. Key Content and Findings: Mature teratomas and liposarcomas are the most common giant anterior mediastinal tumors and MMS develops most frequently in case of malignant lymphomas. Here, we propose a new treatment strategy for giant anterior mediastinal tumors. Based on imaging findings, giant anterior mediastinal tumors can be classified as cystic or solid and further blood investigation data are useful for a definitive diagnosis. When malignant lymphoma or malignant germ cell tumor is highly suspected, the first choice of treatment is not surgery but chemotherapy and radiotherapy. Moreover, image-guided drainage may be effective if giant cystic anterior tumors develop into MMS. The risk classification of MMS is important for treating giant anterior mediastinal tumors. If the MMS risk classification is 'unsafe' or 'uncertain', the intraoperative management deserves special attention. The surgical approach should however be based on tumor localization and invasion of surrounding tissues. Multidisciplinary team coordination is indispensable in the treatment of giant anterior mediastinal tumors. Conclusions: When giant anterior mediastinal tumors are encountered, it is important to follow the appropriate treatment strategy, focusing on the development of MMS based on imaging findings and symptoms.