Pathology, research and practice · 2014
NUT midline carcinoma of the mediastinum showing two types of poorly differentiated tumor cells: a case report and a literature review.
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Nakamura Harumi, Tsuta Koji, Tsuda Hitoshi, Katsuya Yuki, Naka Go, Iizuka Toshihiko, Igari Toru
Аннотация
Nuclear protein in testis (NUT) midline carcinoma (NMC) is an extremely aggressive carcinoma that is genetically defined by rearrangement of the NUT gene. Herein, we describe a case of NMC in a young Japanese man, and review 31 cases of NMC in the literature. The present case was of a massive tumor of the anterior and middle mediastinum in a 26-year-old man. The tumor included 2 types of poorly differentiated tumor cells and was immunohistochemically positive for the NUT-specific antigen, epithelial membrane antigen (EMA), cluster of differentiation 99 (CD99) antigen, CD45RO antigen, keratins, p63, and p40. The patient died 2 months after the initial diagnosis. At least two-thirds of the 31 NMC cases in the literature were immunohistochemically positive for EMA, p63, and AE1/AE3. However, some exceptional NMC cases are keratins-negative/CD99-positive like Ewing sarcoma or CD45RO-positive like the present case.