Ovarian teratoma has various presentations. We present a 28-year female diagnosed with a tumour after a fainting episode. Medical history was non-contributory except for mild intermittent pelvic pain. Cardiologic and neurological evaluation found no cause of syncope. Abdominal ultrasound revealed a right ovarian tumour that was laparoscopically removed. The menses continued to be normal. The pathological exam showed an encapsulated tumour of 8 cm with hair and small bone parts (mature teratoma with a cystadenoma). Immunohistochemistry was positive for CK34beta E12 in stratified squamous epithelium of skin glands; positive CK7 in kidney tubular parts; positive actin in smooth muscle. The endocrine profile was normal and the patient remained asymptomatic. The challenging in the pathological report was to differentiate a cystic part of a solid tumour to a teratoma associated cystadenoma. No apparent cause of syncope was found so a possible tumour related local pain and inflammation mechanism might be involved.
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