Squamous Cysts Involving the Skull and Distal Phalanges

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Abstract
Over 150 cases of squamous cyst in the skull and over fifty-five such cysts in the distal phalanges have been reported. The clinical data and pathological findings in eleven patients with squamous inclusions in the skull and in ten patients with squamous inclusions in the phalanges are reported. Three of these were unique: one was the first recorded case of squamous cysts in the distal phalanges of two different fingers in the same patient; the second, the first recorded case of squamous cyst of the distal phalanx of a toe; and the third, the youngest reported patient (two months old) with a squamous cyst of the skull. The absence of a history of trauma in the phalangeal cases reported here is believed to be explained by the poor data on the cases registered at the Armed Forces Institute of Pathology and possibly by the minor nature of the trauma necessary to displace the epithelium and cause subsequent erosion of the periosteum. Adequate therapy consists in removal of the cyst and its wall by curettement or removal of the involved portion of bone.

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