Affiliation:
1. IRCCS-Arcispedale Santa Maria Nuova, Reggio Emilia, Italy
2. Ospedale C. Magati, Scandiano, Reggio Emilia, Italy
Abstract
Esophageal bizarre stromal cells (BSCs) represent an important diagnostic pitfall, since they can closely resemble a malignancy, thus leading to a significant overtreatment. We recently encountered a case in a healthy 38-year-old man, with a normal blood count, who underwent an upper gastrointestinal endoscopy during the follow-up of a grade I esophagitis and hiatus hernia. The endoscopy revealed an ulcerated sessile polyp that, on histology, consisted of a proliferation of round atypical discohesive cells, with a variable amount of cytoplasm, large nuclei, and prominent eosinophilic nucleoli. They were intermingled with many granulocytes and plump vessels, in a background of granulation tissue. Immunohistochemical stains with pan-cytokeratin, S100, and CD31 were negative and Ki67 stained only very few nuclei. At variance with other anatomical sites and despite the putative fibroblastic or myofibroblastic origin, BSCs in esophagus can have a striking epithelioid appearance, mimicking a carcinoma or a melanoma. Awareness of BSCs can prevent serious misdiagnoses.
Subject
Pathology and Forensic Medicine,Surgery,Anatomy
Cited by
3 articles.
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