title: Clear cell sarcoma of the small bowel: a potential pitfall. Case report.
abstract: Clear cell sarcoma (soft-part melanoma) is a very rare entity with a distinctive histopathologic and molecular profile. Herein, we present the sixth reported case of a primary gastrointestinal clear cell sarcoma discovered in a 21-year-old woman. The patient underwent numerous tests prior to the diagnosis of her small bowel pathology, including the use of capsule endoscopy, which allowed for visualization and final localization of the tumour. Additionally, we discuss this rare type of sarcoma that affects young adults and has a poor prognosis characterized by the balanced chromosomal translocation t(12;22)(q13;q12) with special emphasis on the necessity for pathologists to be able to distinguish it from melanoma -- potentially a major pitfall in diagnosis.
authors.affiliation: Department of Pathology, Loyola University Medical Center, Maywood, IL 60153, USA. gvenkat@lumc.edu
authors.forename: Girish
authors.initials: G
authors.lastname: Venkataraman
authors.forename: Adam M
authors.initials: AM
authors.lastname: Quinn
authors.forename: Jonathan
authors.initials: J
authors.lastname: Williams
authors.forename: Rasheed
authors.initials: R
authors.lastname: Hammadeh
mesh_terms: D000328:Adult; D016145:Endoscopy, Digestive System; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007414:Intestinal Neoplasms / Q000175:diagnosis*; D009418:S100 Proteins / Q000032:analysis / Q000378:metabolism; D018227:Sarcoma, Clear Cell / Q000175:diagnosis*; D014746:Vimentin / Q000032:analysis / Q000378:metabolism
chemical_list: D009418:S100 Proteins; D014746:Vimentin