title: An Extremely Rare Case of Advanced Metastatic Small Cell Neuroendocrine Carcinoma of Sinonasal Tract.
abstract: Small cell neuroendocrine carcinoma (SNEC) is a rare form of malignancy. It mainly presents as bronchogenic neoplasm, and the extrapulmonary form accounts for only 0.1% to 0.4% of all cancers. These extrapulmonary tumors have been described most frequently in the urinary bladder, prostate, esophagus, stomach, colon and rectum, gall bladder, head and neck, cervix, and skin. Primary SNEC of the sinonasal tract is extremely rare with only less than 100 cases reported in the literature. Because of extreme rarity and aggressiveness of the tumor, the management for this entity varies considerably mandating multimodality approach. In this paper, we report a patient presented with left-sided facial swelling, and the histopathologic examination confirmed primary SNEC of left sinonasal tract. The tumor involved multiple paranasal sinuses with invasion into the left orbit and left infratemporal fossa and metastasized to cervical lymph nodes and bone. The patient encountered devastating outcome in spite of optimal medical management and treatment with palliative chemotherapy highlighting the necessity for further research of primary SNEC of head and neck.
authors.affiliation: Department of Medicine, Division of Hematology and Oncology, The Brooklyn Hospital Center, Brooklyn, NY 11201, USA.
authors.forename: Yu Yu
authors.identifier: 0000-0001-5328-5167
authors.initials: YY
authors.lastname: Thar
authors.affiliation: Department of Medicine, The Brooklyn Hospital Center, Brooklyn, NY 11201, USA.
authors.forename: Poras
authors.identifier: 0000-0001-5077-1389
authors.initials: P
authors.lastname: Patel
authors.affiliation: Department of Pathology, The Brooklyn Hospital Center, Brooklyn, NY 11201, USA.
authors.forename: Tiangui
authors.identifier: 0000-0002-2232-0182
authors.initials: T
authors.lastname: Huang
authors.affiliation: Department of Medicine, Division of Hematology and Oncology, The Brooklyn Hospital Center, Brooklyn, NY 11201, USA.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Guevara