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What is Dermoid cyst are commonly seen in: September 2011 and explain in detail?
Ans. C: Skull Dermoid cysts are included in group of swellings related to the supraorbital margin (skull) They are usually external angular cysts although they may occur medially Swellings of the skin: Lipoma: Universal tumour - Slipping margin sign - MC site is trunk Dercum's disease: Muliple lipomata Cavernous hemangioma: Arises from veins Plxiform hamengioma: Arises from aeries Was: Caused by human papilloma virus Marjolins ulcer: Squamous cell Ca Potts puffy tumour: Osteomyelitis of skull Rasp berry tumour: Adenoma of umbilicus Cavernous lympahngioma: - Cystic hygroma - Fluid filled lesions of lymphatic origin - MC arises in neck - Associated with Turners syndrome, trisomies, fetal alcohol syndrome - rilliantly translucent Positive cough impulse - Excision is treatment of choice Cock's peculiar tumour: Complication of sebaceous cyst/ retention cyst Rhinophyma/ potato nose: Acne rosacea Branchial cyst: Remnant of 201 branchial cleft