An oriented 7.0 x 5.5 x 3.5 cm. portion of breast tissue was received. On serial sectioning, a 1.8 x 1.5 x. 1.5 cm. circumscribed, round, tan-white mass with soft, blood filled cyst-like spaces was identified. Attached to this mass was a second firm mass, 1.8 x 0.8 x 0.5 cm.