The clinical recognition of cystic carcinoma of the breast.

Cystic malignant growths of the breast are uncommon, being only 1 per cent of all carcinomas of the breast. They can be easily diagnosed clinically by noting an unusual patient age, the nature of the fluid aspirated (bloody or peculiar) and recurrence or persistence of the "cyst." The results of cytologic examination of the aspirate has not been helpful in the diagnosis of these lesions.