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Int J Surg Pathol ; 31(7): 1375-1380, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36803126

RESUMO

Nonsebaceous lymphadenoma is a rare benign salivary tumor. It is easily misdiagnosed as lymphoepithelial carcinoma, leading to overtreatment. Some patients experience sequelae after undergoing cervical lymph node resection and adjuvant treatment, so it is critical to distinguish these entities. We describe the histopathological and immunohistochemical features of this rare entity in 3 cases and discuss the differential diagnosis and histogenesis. Nonsebaceous lymphadenoma can be distinguished from lymphoepithelial carcinoma by the following histological features: There is a lymph node-like form at low magnification, with prominent proliferating epithelial nests but no destructive growth pattern; variable numbers of tubuloglandular components are always seen in proliferating epithelial nests, which transition to cystically dilated salivary ducts; no lesion necrosis exists; and mitotic figures are absent or rare. No patients experienced recurrence during the 8- to 69-month (mean, 29 months) follow-up.


Assuntos
Adenolinfoma , Carcinoma , Humanos , Adenolinfoma/diagnóstico , Adenolinfoma/patologia , Sobrediagnóstico , Imuno-Histoquímica , Glândulas Salivares/patologia
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