PMC

Gross picture showing opened up thin-walled unilocular cyst (left) and its content—yellowish sebaceous material and tufts of hairs (right).

Intraoperative photograph of gravid uterus (yellow arrow) alongside the ovarian tumour (blue arrow) having glistening intact capsule and tortuous vessels on the surface.

H&E stained sections from the tumour showing (A) Cyst wall lined by keratinised stratified squamous epithelium with hair follicles, sebaceous glands, adipose tissue and smooth muscle bundles (×40). (B) Melanin loaded elongated cells resembling retinal pigment epithelium merging with glial tissue and blood vessels (×40). (C) Higher magnification of the retinal anlage and pigment epithelium (×100). (D) Neuroglial tissue with cell bodies of neurons (×100).