Hydatic cyst is caused by Echinococus worm, that involves any part of the body, sometimes it is presented in organs such as thyroid, breast and other organs. Axillary that may be consider adenopathy or metastasis and do biopsy, which so there is danger of leakage, anaphylaxis or relaps.

 The reported case was 39 years old female presented with painless axillary mass without inflammation since 19 years ago that slowly enlarged. Physical findings suggested hydatid cyst which was confirmed with ultrasonography and IHA for Echinococus granolosus and other diseases ruled out. She was operated and she had no relapses after 1.5 years follow up.