Adenomatoid tumor of the skin: Differential diagnosis of an umbilical erythematous plaque |
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Authors: | Ingrid Ferreira Olivier De Lathouwer Hugues Fierens Anne Theunis Josette Andr Nicolas de Saint Aubain |
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Institution: | Ingrid Ferreira,Olivier De Lathouwer,Hugues Fierens,Anne Theunis,Josette André,Nicolas de Saint Aubain |
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Abstract: | 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. |
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Keywords: | adenomatoid tumor skin umbilicus |
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