Undifferentiated Small Round Cell Sarcoma of the Postcricoid Region of the Hypopharynx: A Rare Case Report and Review of the Literature

• Main Authors: Zhu J, Li B, Hu JJ, Liu W, Lu D, Liu J
• Format: Article
• Language: English
• Published: Dove Medical Press 2021-08-01
• Series: OncoTargets and Therapy
• Subjects: hypopharynx; sarcoma; immunohistochemistry; case report
• Online Access: https://www.dovepress.com/undifferentiated-small-round-cell-sarcoma-of-the-postcricoid-region-of-peer-reviewed-fulltext-article-OTT

Jiao Zhu,1 Bo Li,1 Juan Juan Hu,1 Weiping Liu,2 Dan Lu,1 Jun Liu1 1Department of Otorhinolaryngology Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, People’s Republic of China; 2Department of Pathology, West China Hospital, Sichuan University, Chengdu, People’s Republic of ChinaCorrespondence: Dan Lu; Jun LiuDepartment of Otorhinolaryngology Head & Neck Surgery, West China Hospital, Sichuan University, Wuhou Distrcit, Chengdu, People’s Republic of ChinaEmail [e-mail]; [e-mail]: Undifferentiated small round cell sarcoma (USRCS) is a rare malignant tumor. No reports about USRCS of the postcricoid region of the hypopharynx are available, and its clinical features and treatment guidelines remain undefined. We report a case of USRCS of the postcricoid region of the hypopharynx with treatment of surgery and radiotherapy. A 50-year-old man presented with a 4.9 cm x 3.7 cm tumor in the postcricoid region of the hypopharynx. It was diagnosed as USRCS. The tumor showed small round cells and positive immunoexpression of CD56, Cyclin D1, TLE1 and CD99, but no rearrangement or fusion of EWSR1, SS18, CIC, and BCOR. The patient underwent radiotherapy after surgery, without signs of tumor progression and metastasis at the 9-month follow-up. In conclusion, USRCS of postcricoid region of hypopharyngeal is ultra-rare. To make diagnosis, pathological examination is necessary. Surgery followed by radiotherapy might offer an optional treatment for USCRS.Keywords: hypopharynx, sarcoma, immunohistochemistry, case report