title: [Nevus cell aggregates in axillary lymph nodes in simultaneous mucinous breast carcinoma].
abstract: Nevus cell aggregates in lymph nodes are uncommon. This benign phenomenon may be difficult to differentiate from metastatic neoplasia. We report the case of a 56-year-old patient who underwent breast biopsy, followed by radical mastectomy including lymphadenectomy. Histological examination revealed solid cell aggregates as foreign tissue in the capsule of 1 of 11 identified lymph nodes devoid of any keratin immunoreaction. Strong immunohistological staining for the S-100 protein confirmed the diagnosis of nevus cell aggregates.
authors.affiliation: Institut für Pathologie, Auguste-Viktoria-Krankenhaus, Berlin-Schöneberg.
authors.forename: A
authors.initials: A
authors.lastname: Droste
authors.forename: G
authors.initials: G
authors.lastname: Grosse
authors.forename: B
authors.initials: B
authors.lastname: Bachler
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000473:pathology*; D014408:Biomarkers, Tumor / Q000032:analysis; D001943:Breast Neoplasms / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008207:Lymphatic Metastasis; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D009506:Nevus / Q000473:pathology*
chemical_list: D014408:Biomarkers, Tumor