Large palpable painless mass. Laboratory findings are normal.
The differential diagnosis of a large cystic mass with internal echoes in the lower abdomen in a female patient include a hemorrhagic ovarian cyst, a cystic ovarian carcinoma and a dermoid cyst. The mixed very echogenic contents are very suggestive for a dermoid cyst.
A dermoid cyst or cystic teratoma can contain developmentally mature skin complete with hair follicles and sweat glands, sometimes clumps of hair, and often pockets of sebum, blood, fat, bone, nails, teeth, eyes, cartilage, and thyroid tissue. Because it contains mature tissue, a dermoid cyst is almost always benign.
Surgery confirmed the presence of a benign dermoid cyst.