title: A case of malignant eccrine spiradenoma metastatic to intramammary lymph node.
abstract: Eccrine spiradenoma (ES) is a fairly common, benign, cutaneous tumor originating from the sweat glands. In contrast, the malignant counterpart of ES, malignant eccrine spiradenoma (MES), is extremely rare. A long-standing lesion rarely begins to enlarge rapidly. A growth that results in ulceration or discoloration may be associated with malignant transformation. We present the first reported case of this tumor metastasizing to an intramammary lymph node (IMLN). The uncommon metastasizing focus of the periumbilical MES and its histopathological similarity with a primary breast carcinoma made the diagnosis difficult.
authors.affiliation: Department of Surgery, Tsuchiura Kyodo General Hospital, 11-7 Manabeshin-machi, Tsuchiura, Ibaraki, 300-0053, Japan. choshi_sai_yuu@k6.dion.ne.jp
authors.forename: Yuko
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Ekapot
authors.initials: E
authors.lastname: Bhunchet
authors.forename: Toshikatsu
authors.initials: T
authors.lastname: Shibata
mesh_terms: D006607:Adenoma, Sweat Gland / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D000368:Aged; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology / Q000601:surgery; D008207:Lymphatic Metastasis / Q000473:pathology; D042361:Mammary Glands, Human; D013544:Sweat Gland Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D016217:Ultrasonography, Mammary