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Dermoid cyst ByMomen Ali Khan
Definition
It is a cyst lined by skin and deep to skin
ClassificationCongenitalSequestration dermoidTubolodermoid- thyroglossal cyst, anal dermoidTeratomatous dermoid
Acquired Implantation dermoid
Composition
Composition of dermoid cyst- opaque mixture of Epithelial debris Sweat Sebum Hair follicle
Sequestration dermoidClinical featurePainless swelling arise in second or third decade oflife.ExampleDermoid cyst on centre of foreheadDermoid cyst on roof of nosePost auricular dermoidDermoid cyst on lateral angle of eyeball
Implantation dermoid
Due to minor trauma or prick ,skin implant into deep causes dermoid cyst.Clinical featurePainless slowly progressive swelling
Common siteFingerToeFoot
Teratomatous dermoid�In ovary: dermoid cystTestis: teratoma�Mediastinum: mediastinal cyst�Retroperitoneum: retroperitoneal cyst�Postanal dermoid�
Differential DiagnosisSebaceous cystLipomaFibromaNeurofibroma
Investigation X-ray of part both AP and lateral view CT scan of brain if dermoid in skull ECG RBS
Treatment
Simple excision under local anesthesiaGeneral anesthesia require in some case
Complication Complications of dermoid cyst-
Infection�HemorrhagePressure effect on adjacent structure�Calcification�Rupture and surface ulceration�