We report the case of a 63 years old woman with a left maminary hydati
d cyst. The patient presented with a left painless mammary mass of fou
r months evolution. Mammography snowed a dense image of 9 cm O in the
left breast. Ultrasound showed a solid and heterogeneous lesion. The t
umor was excised under general anesthesia. The initial macroscopic ins
pection sowed a tumor with a well defined fibrous capsule filled with
a grayish material that contained membrane debris. The pathological st
udy confirmed the diagnosis of a hydatid cyst.