The origin of ovarian @entity4890 is unknown. Sixteen ovarian and 2 paraovarian squamous-lined cysts unassociated with teratomatous elements were studied. The @entity42 represented 1.5% of consecutive ovarian surface @entity5 examined and were one-nineteenth as common as mature cystic @entity44 . The mean @entity1 age was 57 years. All @entity5 were unilateral and the majority were incidental findings. The mean @entity5 size was 1.75 cm and the median, 3.0 cm. In comparison to 120 consecutive @entity1 with mature cystic @entity44 who had a mean age of 41 years and a mean @entity5 size of 6 cm, the @entity42 were significantly smaller and occurred at a significantly older age (P<0.01). All cysts displayed mature squamous epithelium with a granular layer, with @entity5656 in 14 and @entity8286 in 4. In 2 @entity1 , there were contralateral mature cystic @entity44 , and in 2 others the cysts contained rare hairs. Two displayed foci of @entity5 and 1 appeared to arise in @entity46 . In summary, 7 of 16 @entity42 displayed features suggesting they reflected insufficiently sampled @entity44 , @entity5 with @entity1544 , or a metaplastic change in @entity46 . @entity4890 as defined by histology is a heterogeneous group; pure @entity4890 , if it exists at all, probably represents less than 1% of ovarian surface @entity5 .

Ovarian and paraovarian squamous-lined cysts ( XXXX ): a clinicopathologic study of 18 cases with comparison to mature cystic @entity44 .

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity4890 :: ('MESH:D004814', 'Disease') :: ['Epidermoid cyst of the ovary', 'epidermoid cyst'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'Brenner tumors', 'Brenner tumor', 'epithelial tumors', 'tumors'] @entity5656 :: ('MESH:D017488', 'Disease') :: ['hyperkeratosis'] @entity8286 :: ('MESH:D010241', 'Disease') :: ['parakeratosis'] @entity42 :: ('MESH:D010048', 'Disease') :: ['ovarian epidermoid cysts', 'ovarian cysts'] @entity1544 :: ('MESH:D018307', 'Disease') :: ['squamous metaplasia'] @entity46 :: ('MESH:D004715', 'Disease') :: ['endometriosis'] @entity44 :: ('MESH:D013724', 'Disease') :: ['teratoma', 'teratomas']
@entity4890 :: (MESH:D004814,Disease) :: ['epidermoid cysts']
