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Adenomatoid tumor of the skin: Differential diagnosis of an umbilical erythematous plaque
Author(s) -
Ferreira Ingrid,
De Lathouwer Olivier,
Fierens Hugues,
Theunis Anne,
André Josette,
Saint Aubain Nicolas
Publication year - 2021
Publication title -
journal of cutaneous pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.597
H-Index - 75
eISSN - 1600-0560
pISSN - 0303-6987
DOI - 10.1111/cup.13872
Subject(s) - medicine , umbilicus (mollusc) , differential diagnosis , pathology , adenomatoid tumor , biopsy , skin biopsy , stroma , anatomy , immunohistochemistry
Adenomatoid tumors are benign tumors of mesothelial origin that are usually encountered in the genital tract. Although they have been observed in other organs, the skin appears to be a very rare location, with only one case reported in the literature to our knowledge. We report a second case of an adenomatoid tumor, arising in the umbilicus of a 44‐year‐old woman. The patient presented with an 8‐month‐old erythematous and firm plaque under the umbilicus. A skin biopsy showed numerous microcystic spaces dissecting a fibrous stroma and lined by flattened to cuboidal cells with focal intraluminal papillary formation. This little‐known diagnosis constitutes a diagnostic pitfall for dermatopathologists and dermatologists, and could be misdiagnosed as other benign or malignant entities. Through this case report, a practical approach and diagnostic keys have been devised to avoid misdiagnosis and overtreatment.