[The mammographic and sonographic clinical picture of cystosarcoma phyllodes]

Cystosarcoma phylloides is characterized by frequent local recurrences, by questionable tumour status and by the often large size or extension. This very rare tumour is mentioned in the literature mostly as a case report. During 1974-1989 a group of 15 cases could be collected. Starting with the different pathological and anatomical features, the typical mammographic and sonographic criteria are described. The outline of the tumour is smooth and often lobulated. The solid component has echo levels lower than the surrounding breast tissue and is mostly homogeneous. Some parts may be cystic. Endotumoral calcifications are very rare. In all cases a zone of dorsal acoustic enhancement was seen. Differential diagnosis is discussed. In large breast tumours with slow and episodic growth, the tentative diagnosis cystosarcoma phylloides should be considered more often.