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BACKGROUND: Cutaneous metastases (CMs) are a manifestation of advanced cancer and can be treated with oncolytic immunotherapy. Laboratory studies suggest radiotherapy (RT) may facilitate response to immunotherapy. We hypothesized that oncolytic immunotherapy with talimogene lapherparepvec (T-VEC, an oncolytic immunotherapy that expresses granulocyte-macrophage colony stimulating factor) and RT would produce response in non-targeted metastases. METHODS: A randomized phase 2 trial of T-VEC+/-RT was conducted. Eligible patients had ≥1 CM from a solid tumor amenable to T-VEC and RT and another measurable metastasis. Tumor and overall response was assessed using modified World Health Organization (mWHO) criteria. Adverse events (AEs) and quality of life (QOL) were characterized using CTCAE v4.0 and Skindex-16, respectively. Correlative analyses of tumor genomics and the immune system were performed. RESULTS: 19 patients were randomized to receive T-VEC (n = 9) or T-VEC+RT (n = 10). One patient in each arm demonstrated complete response in the largest non-targeted metastasis. The trial was closed after the first stage of enrollment because of no overall mWHO responses, slow accrual and the COVID-19 pandemic. AEs were consistent with prior reports of T-VEC. Skin related QOL was poor before and after treatment. Median progression free survival was 1.2 and 2.5 months in the T-VEC and T-VEC+RT arms; median overall survival was 4.9 and 17.3 months in the T-VEC and T-VEC+RT arms. Analyses of peripheral blood cells and cytokines demonstrated responders exhibited several outlying lymphocyte and cytokine parameters. CONCLUSIONS: Low overall response rate, slow accrual, and the COVID-19 pandemic led to closure of this trial. Responses in non-injected and non-irradiated metastases were infrequent.

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The Sister Mary Joseph syndrome is characterized by cutaneous metastases localized at the umbilical level. It is a rare clinical sign estimated to occur in 1%-3% of patients with abdominopelvic cancer. The most common histology is adenocarcinoma (75% of cases). The presence of this nodule is often indicative of a poor prognosis, with average survival estimated at two to 11 months without treatment. We report the clinical case of Sister Mary Joseph syndrome in a 50-year-old woman who had been followed for three years for endometrioid adenocarcinoma of the endometrium. The diagnosis was established via umbilical biopsy after a computed tomography scan revealed the presence of an umbilical nodule. The patient is currently undergoing a palliative chemotherapy regimen.

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Introduction: Skin metastases arise in 10% of cancer patients, but standardized dermoscopy diagnostic criteria for skin metastases remain poor. This study's objective was to analyze the dermoscopy features of skin metastases from advanced systemic and cutaneous cancers. Methods: A retrospective study on 715 dermoscopy images of skin metastases from 33 patients with various primary cancers (breast, ovary, melanoma, non-melanoma skin cancer, and chronic leukemia) attending two academic centers between 2013 and 2023 was performed. Four independent observers blindly analyzed patterns, colors, vessels, and elementary lesions for each metastasis (30 parameters in total). Results: The structureless white pattern was the most prominent indicator of cutaneous metastasis (81.26%, p < 0.001). Regardless of the primary tumor, colors pink, red, white, and tan were identified. Elementary lesions were infrequent, except for melanoma metastases that displayed dots (13.23%) and globules (11.11%). Breast cancer metastases presented: blue (41.48%) and red (34.32%) colors, irregular vessels (13.58%), and a blue-naevus pattern (22.22%). Melanoma metastases displayed: a blue-naevus pattern (61.38%), a blue color (85.71%), and a structureless-blue combination pattern (79.37%). Non-melanoma skin cancer metastases were characterized by vascular (42.11%) and angioma-like (31.58%) patterns, pink (57.89%) and red (57.89%) colors, irregular (57.89%), thin hairpin (47.37%), comma (47, 37%), and thick hairpin (26, 32%) vessels and a red, white and irregular vessels combination pattern (52, 63%). A pink structureless combination pattern was frequent (61.05%) in chronic leukemia metastases. Ovarian cancer metastases displayed a white and tan structureless combination pattern (100%) and frequently had dotted vessels (42.85%). Conclusion: Papules and nodules with a white structureless pattern suggest skin metastases, regardless of the primary tumor. A blue structureless lesion is indicative of melanoma metastasis and a vascular pattern with irregular vessels indicates a non-melanoma skin cancer metastasis. Dermoscopy stands as a reliable non-invasive diagnostic method for suspected cutaneous metastases in patients with a known cancer history.

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Cutaneous metastases are seen in up to 10% of all oncology patients and can occur in different locations depending on the entity. Cutaneous metastases are often associated with a high psychological burden and, especially in the case of exulceration, with shame and social withdrawal. This review discusses the diagnostic and therapeutic options. The most common tumor entities in which cutaneous metastases are observed are discussed, and local and systemic treatment options are presented according to the current state of research.

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While typically low-risk, cutaneous squamous cell carcinoma (cSCC) can infrequently progress to metastatic disease with in-transit lesions, localized to the dermis or subcutaneous tissue between the primary tumor and draining regional lymph nodes. These lesions are associated with poor prognostic values, including decreased survival rates and increased risk of recurrence. We present the case of a 75-year-old male with cSCC and in-transit metastases on his scalp treated with the immune checkpoint inhibitor (ICI) pembrolizumab in conjunction with diphencyprone (DPCP), a topical hapten that induces a delayed-type hypersensitivity reaction in the skin. The patient was enrolled in a clinical trial (NCT05481658) that involved the twice-weekly application of DPCP 0.04% ointment to four of the in-transit metastases on his frontal scalp, concurrent with pembrolizumab 300 mg administered every three weeks. Following effective sensitization and a twelve-week treatment course, complete clearance of all lesions, DPCP-treated and non-DPCP treated, was achieved, with no adverse events. The immunologic profiles of the post-treatment biopsies were analyzed by TaqMan Low Density Array quantitative real-time polymerase chain reaction to measure immune marker gene expression. Relative to the non-DPCP-treated lesion, the DPCP-treated lesion demonstrated increased pro-inflammatory genetic markers and T-cell activation. This case represents the first reported instance of in-transit metastases of cSCC successfully treated with DPCP and an ICI. It highlights the potential safety and efficacy of DPCP with systemic immunotherapy for the management of in-transit metastases of cSCC in patients for whom surgery and radiation may be contraindicated.

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Objectives: Thyroid carcinoma with cutaneous metastases is a rare clinical finding. Cutaneous metastases from thyroid carcinoma have been associated with a poor prognosis, but these data are limited to case reports. The exact mechanism of cutaneous metastases from thyroid carcinoma is not clear. Our study aims to report the demographic, clinical, and histologic findings of patients with cutaneous metastases from thyroid carcinoma. Methods: A review was conducted using the Medline/PubMed, Cochrane, and Scopus databases to review literature from inception to May 2023. Data extracted included patient age at diagnosis of cutaneous metastases, patient sex, thyroid carcinoma histotype, location of metastases, the time interval between diagnoses of thyroid carcinoma and cutaneous metastases, and overall survival (OS) from the time of cutaneous metastases. Results: One hundred thirty-six patients were identified and 75 were female. The most common types of thyroid carcinoma with cutaneous metastases were papillary (47.79%), followed by follicular (30.15%), and medullary (11.03%). In addition, 11 cases of anaplastic carcinoma, 2 cases of oncocytic carcinoma, and 2 cases of poorly differentiated thyroid carcinoma were reported. The average age at diagnosis of cutaneous metastases was 63.13 years, and the average time interval between the diagnoses of primary thyroid carcinoma and cutaneous metastases was 48.27 months. The most common location of metastases was the scalp (n = 48). Other common locations included the neck, chest, and face. The OS after diagnosis of metastases was only available in 34 patients with an average of 13.07 months. Of these 34 cases, 10 were medullary, 10 were papillary, 9 were anaplastic, and 5 had follicular carcinoma. Conclusions: This study represents an up-to-date review of the cases of thyroid carcinoma with cutaneous metastases. While cutaneous metastasis remains a rare finding, one needs a high index of suspicion, and their presence portends a poor prognosis.

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Background: Breast cancer represents a leading cause of malignancy among Chinese women, posing a significant health burden. The diagnosis of metastatic breast cancer, particularly to uncommon sites like the skin and stomach, presents distinct challenges. Case introduction: This case report describes a 71-year-old Chinese women with a persistent back rash lasting more than 6 months. Physical examination revealed red papules on her back. Immunohistochemistry confirmed positive for cytokeratin 7(CK7), GATA-3 and GCDFP15, as well as negative staining of cytokeratin 20 (CK20), suggesting breast cancer metastasis. Further evaluation revealed a breast nodule and axillary lymph node enlargement, with biopsies confirming invasive lobular carcinoma (ILC). Abdominal computed tomography (CT) revealed thickening of the gastric and ascending colon walls. Gastroscopy revealed chronic superficial atrophic gastritis. However, gastric metastasis was further confirmed by pathology. The patient initiated endocrine therapy with fulvestrant and exemestane, resulting in rash resolution and stable breast and stomach lesions after 3 months. Overall, the patient is experiencing an improvement in her condition and remains stable while continuing treatment. Conclusion: This case highlights the importance of considering atypical metastatic patterns in breast cancer and the potential efficacy of endocrine therapies in managing such cases. Moreover, it emphasizes the need for vigilance in breast cancer patients, especially those with ILC, as gastrointestinal symptoms may indicate gastric metastasis (GMs). Ultimately, early detection and appropriate treatment strategies, such as endocrine therapy, can contribute to improved outcomes in these challenging cases.

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Colorectal cancer (CRC) is the third most common malignancy. Common metastatic sites for colorectal carcinoma are the lung and liver while cutaneous metastases are extremely rare. Skin metastasis may be an early manifestation of metastatic disease and represents a poor prognosis. Here we present a case of metachronous skin metastasis during chemoradiation treatment in a patient with locally advanced rectal cancer. A young boy aged 19 years presented to our hospital with radiological TNM staging of T3c N1 M0 with circumferential resection margin (CRM) involved. The treatment plan was defunctioning colostomy with neoadjuvant chemotherapy and radiotherapy with a later plan for surgery. Seven months later, there is a focal skin nodule in the nape of the neck. A core biopsy of this cutaneous nodule was done and proved metastatic. Surgery for the primary tumor and oligometastatic site was planned but due to extensive primary tumor, surgery was terminated and continues with chemotherapy and reassessment.

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Background: Enteric-type adenocarcinoma of the lung (lung-ETAC) is a rare form of lung cancer with histologic similarities to colorectal cancer, with aggressive behavior and unfavorable prognosis. Case Presentation: An 81-year-old man presented with discolored skin lesions on the chest and abdomen. After comprehensive evaluation, including skin biopsy and molecular profiling, the patient was diagnosed with having lung-ETAC with a BRAF p.V600E mutation. Treatment with dabrafenib and trametinib initially resulted in positive results, with improvement in skin lesions and overall clinical condition. Nevertheless, approximately 6 months after, the disease had progression with new skin lesions reappearing. Conclusions: We reported a unique case of a patient with BRAF p.V600E-mutant lung-ETAC with metastatic skin lesions achieving complete cutaneous response after targeted treatment with dabrafenib and trametinib, highlighting the potential for targeted therapy in patients with lung-ETAC harboring a BRAF p.V600E mutation.

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Cutaneous metastases of ovarian cancer are rare and often have poor prognosis. We report a case of a 62-year-old woman with recurrent low-grade serous ovarian cancer, who presented with lung, brain, and multiple skin (nasal and anterior chest wall) metastases approximately six months after the initial diagnosis. In this case, Nijmegen breakage syndrome carrier status caused by RAD50 heterozygous mutation and previous bevacizumab therapy could be the predisposing factor for cutaneous metastases. The patient was treated with local radiotherapy (nasal skin and brain, 30Gy/6f/1.2W) and three courses of chemotherapy with albumin-bound paclitaxel and carboplatin, resulting in drastic remission of the cutaneous metastases. Unfortunately, treatment interruption resulted in rapid tumor progression, followed by death. This case represents an interesting example of cutaneous metastasis of ovarian cancer with rare clinical manifestations, unique genetic mutations, and reasonable response to treatment. Chemoradiotherapy might be an appropriate option for cutaneous metastases of ovarian cancer. Nevertheless, we still hope to find out the best treatment strategy after collecting and reviewing more cases in the future.

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Melanoma is one of the deadliest skin tumors, accounting for almost 90% of skin cancer mortality. Although immune therapy and targeted therapy have dramatically changed the prognosis of metastatic melanoma, many patients experience disease progression despite the currently available new treatments. Skin metastases from melanoma represent a relatively common event as first sign of advanced disease or a sign of recurrence. Skin metastases are usually asymptomatic, although in advanced stages, they can present with ulceration, bleeding, and superinfection; furthermore, they can cause symptoms related to compression on nearby tissues. Treatments vary from simple surgery resections to topical or intralesional local injections, or a combination of these techniques with the most recent systemic immune or target therapies. New research and studies should focus on the pathogenesis and molecular mechanisms of the cutaneous metastases of melanoma in order to shed light on the mechanisms underlying the different behavior and prognoses of different patients.

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Ovarian cancer is the most lethal gynecologic malignancy, mostly diagnosed in the advanced stage with multiple sites of metastases. Routes of spread are direct through exfoliation, lymphatic channels, and less commonly hematogenous spread. Skin metastasis in ovarian malignancy is a rare occurence, its incidence range from 1.9% to 5.1% and the most common sites are the abdominal wall and chest wall. The incidence of metastasis to breast and/or axillary lymph nodes is very rare, ranging from 0.03% to 0.6%. We report the case of a 60-year-old female with stage IV B undifferentiated ovarian carcinoma with multiple cutaneous metastases involving the skin over the left breast, scalp, and mediastinal lymph nodes, which are rare sites of metastases. The incidence of cutaneous metastasis in ovarian cancer is 1.9%-5.1% and the overall survival after diagnosis ranges from 2 to 65 months.

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Electrochemotherapy has been proven to be an efficient treatment for cutaneous metastases of various cancers. Data on breast cancer (BC) patients with cutaneous metastases were retrieved from the INSPECT database. Patients were divided by their receptor status: HER2+, HR+ (ER/PgR+), and TN (triple negative). Groups were similar for histological subtype and location of the nodules. Most patients were previously treated with surgery/systemic therapy/radiotherapy. We found no differences in the three groups in terms of response ratio (OR per patient 86% HER2+, 80% HR+, 76% TN, p = 0.8664). The only factor positively affecting the complete response rate in all groups was small tumor size (<3 cm, p = 0.0105, p = 0.0001, p = 0.0266, respectively). Local progression-free survival was positively impacted by the achievement of complete response in HER2+ (p = 0.0297) and HR+ (p = 0.0094), while overall survival was affected by time to local progression in all groups (p = 0.0065 in HER2+, p < 0.0001 in HR+, p = 0.0363 in TN). ECT treatment is equally effective among groups, despite different receptor status. Response and local tumor control seem to be better in multiple small lesions than in big armor-like lesions, suggesting that treating smaller, even multiple, lesions at the time of occurrence is more effective than treating bigger long-lasting armor-like cutaneous lesions.

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Cutaneous metastases as the first sign of invasive ductal carcinoma are not common. The ambiguous presentation of asymptomatic lesions may result in various diagnoses including dermatologic causes. Early diagnosis is essential in such cases. Case presentation: A 43-year-old woman with no risk factors for developing breast cancer at a young age was diagnosed with invasive ductal carcinoma of the left breast after dermatologic complaints of diffuse lesions on the left-back and right subclavian region. The patient remained asymptomatic except for the recent cutaneous presentation, which did not arouse much suspicion. Conclusion: Cutaneous metastases of breast cancer remain uncommon, but at the same time represent a poor prognosis for the patient, and when they do occur, treatment options are limited. The delay in taking the proper diagnostic measures in such cases imposes a need to adopt a wider perspective when dealing with the possible occurrence of advanced disease. This also adds up to the importance of breast self-examination by women at a young age and full examination by physicians, especially when they encounter a misguiding presentation.

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Zosteriform cutaneous metastases from urothelial carcinoma are rare. Here, we report a 50-year-old male with urothelial carcinoma who presented with multiple tender, erythematous papulonodules in an L1-L3 distribution approximately 6 years after primary tumor diagnosis. He had no history of prior herpes zoster infection. Histopathology showed lobules and small nests of atypical epithelioid cells positive for GATA3, CK20, CK7, and p40 throughout the dermis and within lymphatic vessels highlighted by D2-40, consistent with cutaneous metastases from urothelial carcinoma. No perineural invasion or viral cytopathic change was present. The patient died approximately 8 months after diagnosis of cutaneous metastases. Since its first report in 1986, there have been only six cases of zosteriform cutaneous metastases from urothelial carcinoma. We review the prior literature including hypotheses of the pathogenesis of zosteriform cutaneous metastases, which remain incompletely understood.

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Background: Signet-ring cell gastric carcinoma is a highly malignant tumor, with the characteristics of strong invasiveness, rapid progression, a high degree of malignancy, and generally poor prognosis. The most common site of metastases is the abdominal organs, especially the liver, while delayed cutaneous metastases are rare. Case presentation: We report a case of cutaneous metastases on the head, groin, and thigh, which recurred 7 years after signet-ring cell gastric carcinoma surgery. The patient was diagnosed with a 2.0×1.5×1.0cm tumor at the angle of stomach, and treated with Billroth II distal gastrectomy accompanied with D2 lymph node dissection. According the pathology, the stage was pT1N3M0. Then the patient received two cycles of oxaliplatin and tegafur chemotherapy, which was discontinued due to the inability to tolerate the side effects of chemotherapy. Seven years after the surgery, the patient initially presented with a fleshy mass on the head and beaded nodules in the groin; then, the mass gradually became larger, along with the thighs turning red, swollen, and crusty. Firstly, the patient was diagnosed with "lower extremity lymphangitis" and treated mostly with anti-inflammatory, promote lymphatic return, detumescence and elastic force cannula in vascular surgery department. However, the symptoms relieved insufficient. Finally, the skin biopsy indicates a signet-ring cell gastric carcinoma cutaneous metastasis. The whole-body PET-CT examination showed multiple nodules with increased metabolism. Then the patient was transferred to The Department of Oncology for further chemotherapy. Conclusion: Our case highlights that gastric tumor recurrence and metastasis should be highly suspected when skin lesions appear in patients with signet-ring cell gastric carcinoma. At the same time, multidisciplinary consultation and close cooperation between surgeons, oncologists, and dermatologists are of great significance to the diagnosis and treatment of this disease.

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Biphasic squamoid alveolar renal cell carcinoma (BSARCC) is a newly emerging distinct and rare morphologic variant of renal cell carcinoma (RCC). Morphological, immunohistochemical, and molecular data have shown that BSARCC is closely related to papillary RCC type 1. We report a case of Biphasic squamoid alveolar renal cell carcinoma with a rare presentation as cutaneous metastases. This variant tends to show an aggressive behavior. Hence, accurate histopathological diagnosis can help in effective treatment and for close follow-up of the patients.

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