Introduction
Low-grade adenosquamous breast cancer (ASBC) is a rare histological subtype of metaplastic breast cancer. Even tough it is a triple negative cancer, it is characterised by a good prognosis, low probability of distant metastases and higher risk of local relapses.
Clinical Case
This is a clinical case of a 65-year-old woman with a retroareolar nodule on the left breast. After histological examination a diagnosis of low-grade adenosquamous breast cancer was established. Further examination of lymph nodes showed regional metastasis of ASBC.
Discussion
Due to its specific growth patterns the diagnosis could easily be mistaken, mostly on core biopsy samples. Vast differential diagnosis is required. The definitive diagnosis could be given on histological examination of surgical sample. Therefore, the recommended treatment is surgical removal of the lesion until more follow-up data is available in literature.
Lakhani SR, Ellis IO, Schnitt SJ, Tan PH, van der Vijer MJ. World Health Organization
Tse GM, Tan PH, Putti TC, Lui PC, Chaiwun B, Law BK: Metaplastic carcinoma of the breast: a clinicopathological review. J Clin Pathol. 2006, 59: 1079-1083. 10.1136/jcp.2005.030536
Van Hoeven KH, Drudis T, Cranor ML, Erlandson RA, Rosen PP: Low-grade adenosquamous carcinoma of the breast. A clinocopathologic study of 32 cases with ultrastructural analysis. Am J Surg Pathol. 1993, 17: 248-258. 10.1097/00000478-199303000-00005.
