نتایج جستجو برای: differentiated neuroendocrine carcinoma
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Small cell neuroendocrine carcinoma is a type of undifferentiated, malignant neuroendocrine tumor. Most of neuroendocrine tumors exhibit well-differentiated features and are classified as carcinoid tumors. However, carcinomas of the liver with anaplastic characters, which are classified as small-cell carcinomas are extremely rare and only few cases have been reported in the literature. We repor...
INTRODUCTION Large cell neuroendocrine carcinoma in the salivary glands is rare. We report a second case of large cell neuroendocrine carcinoma of the submandibular gland diagnosed at autopsy, and a review of the literature. CASE PRESENTATION A 68-year-old Japanese man was referred to our hospital for thorough investigation of swelling on the right side of his neck. Fine-needle aspiration cyt...
intermediateand high-grade tumors; (iii) the term ‘tumor’ (neuroendocrine tumor, NET) is meant for lowto intermediate-grade neoplasms, as previously defined either ‘carcinoid’ or ‘atypical carcinoid’; (iv) the word ‘carcinoma’ (neuroendocrine carcinoma, NEC) is meant only for high-grade neoplasms, as previously defined poorly differentiated carcinomas. This terminology is adopted by the ENETS 2...
of the lung is a newly recognized clinicopathologic entity and defined as a poorly differentiated and high-grade neuroendocrine tumor that stands morphologically and biologically between atypicall carcinoid and small cell lung carcinomal. Histopathologically, most LCNECs revealed a marked decrease in or a loss of organoid architecture and could be mistaken for poorly differentiated adenocarcino...
A 7 cm diameter presacral tumour, not related to the intrapelvic organs, was found in a 51 year old woman. The needle biopsy showed a poorly differentiated large cell carcinoma. The patient died of urosepsis after chemotherapy. Postmortem examination revealed no other primary or metastatic tumour. Histological examination of the presacral tumour showed a large cell carcinoma with a trabecular p...
Neuroendocrine tumors are relatively rare tumors with an incidence of 5.25 per 100,000 per year in the United States [1]. They range from well differentiated slow growing tumors to highly aggressive poorly differentiated tumors [2]. The common primary sites of neuroendocrine carcinomas are lung and gastrointestinal tract. However, 3-5 % of these tumors are diagnosed as metastatic disease with u...
Primary neuroendocrine carcinoma of the breast (NECB) is an extremely rare variant of breast cancer having aggressive clinicopathological behaviour and poor prognosis. A 62 years old woman presented with a painless lump in the left breast. Microscopic and immunohistochemical evaluation of the core-tissue biopsy and of the mastectomy specimen revealed moderately-differentiated neuroendocrine car...
Dispersed neuroendocrine system (D.N.S) consists of a wide variety of cells that are present in the central and peripheral nervous system and in many classic endocrine organs and different tissues such as respiratory and gastrointestinal tracts, skin, prostate, breast and also their neoplasm show neuroendocrine differentiation by electron microscopy, immunohistochemistry or biochemical techniqu...
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