Melanocytic nevus of the anal canal and granular cell tumor of the cecum: a case report and literature review of 2 coincidentally co-occurring neurocristopathies

Granular cell tumors are predominantly benign soft tissue tumors originating from Schwann cells, whereas melanocytic nevi are benign proliferations of melanocytes. We present the case of a patient with the presence of both entities located in the cecum and anal canal, respectively, constituting an e...

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Published inAnnals of coloproctology Vol. 40; no. Suppl 1; pp. S23 - S26
Main Authors Sandoval, Victoria, Lara-Endara, Jorge, Rodríguez-Suárez, Javier, Garzón, Williams Arias, Redrobán, Ligia, Montalvo, Nelson
Format Journal Article
LanguageEnglish
Published Korea (South) Korean Society of Coloproctology 01.05.2024
Subjects
anal
Case Report
case reports
cecum
granular cell tumor
melanocytic nevus
Case reports
Granular cell tumor
Cecum
Melanocytic nevus
Anal
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Summary:Granular cell tumors are predominantly benign soft tissue tumors originating from Schwann cells, whereas melanocytic nevi are benign proliferations of melanocytes. We present the case of a patient with the presence of both entities located in the cecum and anal canal, respectively, constituting an extremely rare coincidental finding. A 43-year-old woman was evaluated by colonoscopy for iron-deficiency microcytic anemia that had lasted for 1 year. Colonoscopy demonstrated a macular lesion of 0.3 cm with a melanocytic appearance in the anal canal; at the cecum level, a subepithelial, yellowish, and partially mobile firm nodular lesion measuring 1.3 cm was observed. A histopathological study showed a melanocytic nevus in the anal canal and a granular cell tumor in the cecum. This is the first reported case of a patient with the extremely rare coincidental-incidental finding of these 2 entities at the same time.
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ISSN:2287-9714
2287-9722
DOI:10.3393/ac.2022.00444.0063