The clinicopathological features of a basaloid carcinoma of the prostate gland are described in a 28‐year‐old man, and the management and prognosis discussed. Basaloid tumours of the prostate are very rare and only a few cases have been described in detail. Those cases which have been reported as adenoid cystic carcinoma, adenoid cystic‐like carcinoma and adenoid basal cell tumour are reviewed.

Key PointsQuestionDo all triple-negative breast cancers demonstrate similar aggressiveness and response to treatment or does heterogeneity exist among triple-negative breast cancers secondary to histological type? FindingsIn this cohort study of 8479 patients with rare breast cancers, adenoid cystic carcinomas and metaplastic breast cancer had similar proportions of tumors that were triple negative (48.1% vs 53.0%), but the 5-year mortality rate for adenoid cystic carcinoma was 8.33% vs 36.91% for metaplastic carcinoma. MeaningThese findings suggest that breast cancer histological type may be associated with overall survival, treatment response, and clinical course despite triple-negative receptor status.