The clinicopathologic features of two cases of composite large-cell neuroendocrine carcinoma and surface epithelial-stromal neoplasm of the ovary are reported and those of eight previously published cases reviewed. The patients ranged in age from 22 to 77 years (mean, 56 years). The surface epithelial-stromal neoplasm was an endometrioid adenocarcinoma in one case, a mucinous cystadenoma in one case, and a mucinous adenocarcinoma in eight cases. The large-cell neuroendocrine carcinoma in these tumors may represent dedifferentiation of the neuroendocrine cells present in the surface epithelial-stromal tumor. This composite tumor type is highly aggressive. Of eight patients with follow-up information, all had died of disseminated tumor; six within 10 months, and two in 19 months and 3 years, respectively, after diagnosis. Only the neuroendocrine carcinoma component was found in the metastatic sites. Int J Surg Pathol 8(2):169-174, 2000
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Nihon Shokakibyo Gakkai Zasshi
January 2025
Division of Gastroenterological, Hepato-Biliary-Pancreatic, Transplantation and Pediatric Surgery, Department of Surgery, Shinshu University School of Medicine.
A 78-year-old male patient came to our hospital with a chief complaint of fever. Computed tomography revealed an indistinct tumor in the pancreatic head, along with dilatation of the bile duct and main pancreatic duct. An endoscopic transpapillary biopsy demonstrated adenocarcinoma in the glandular epithelium and a dense formation of quasi-round cells.
View Article and Find Full Text PDFBMJ Open
January 2025
Department of Medical Oncology, West China Hospital of Sichuan University, Chengdu, Sichuan, China
Introduction: Small-cell lung cancer (SCLC) is a highly malignant neuroendocrine tumour, and concurrent chemoradiotherapy is the current recommended treatment for limited-stage SCLC. However, the overall survival (OS) of patients with SCLC remains poor. Therefore, improving the survival of patients with SCLC and benefitting more patients are urgent clinical requirements.
View Article and Find Full Text PDFClin J Gastroenterol
January 2025
Department of Surgery, Shizuoka Medical Center NHO, 762-1, Nagasawa, Shimizu, Sunto, Shizuoka, 411-8611, Japan.
Mixed neuroendocrine-non-neuroendocrine neoplasm (MiNEN) of the colon is rare with a poor prognosis. Since the first description of a mixed neoplasm 100 years ago, the nomenclature has evolved, most recently with the 2022 World Health Organization (WHO) classification system. We describe our experience of a case of locoregionally advanced MiNEN of the descending colon treated with curative laparoscopic resection and adjuvant chemotherapy.
View Article and Find Full Text PDFBMC Cancer
January 2025
Department of Gynecology, East China Normal University Wuhu Affiliated Hospital (The Second People's Hospital of Wuhu City), Wuhu, 241000, China.
Objective: Neuroendocrine cervical carcinoma (NECC) is a rare but highly aggressive tumor. The clinical management of NECC follows neuroendocrine neoplasms and cervical cancer in general. However, the diagnosis and prognosis of NECC remain dismal.
View Article and Find Full Text PDFExp Dermatol
January 2025
Department of Medicine and Division of Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
Merkel cell carcinoma (MCC) is a skin cancer that arises due to either Merkel cell polyomavirus infection (MCPyV) or ultraviolet (UV) radiation exposure, presenting primarily in the head and neck region of fair-skinned males. The recent success of PD-(L)1 immune checkpoint inhibitors (ICIs) in locally advanced/metastatic MCC, with an objective response rate (ORR) around 50% and improved survival, as a first-line treatment has moved ICIs to the forefront of therapy for MCC and generated interest in identifying biomarkers to predict clinical response. The MCC tumour microenvironment (TME) contains various components of the adaptive and innate immune system.
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