Pseudotumor of the scalp caused by a chronic hygroma with a traumatic CSF fistula.
A 6 1/2-year-old child, who had suffered a depressed fracture of the skull at the age of 1 1/2, had an extensive tumor of the scalp. Microscopic evaluation showed the growth to be a pseudotumor. The spongy tissue proved to be a chronic subdural hygroma containing structures resembling pacchionian granulations. A CSF fistula was demonstrated surgically. The fistula was assumed to be responsible for the metaplastic proliferation of subcutaneous and galeal connective tissue. A growing fracture was not present.
D002555:Cerebrospinal Fluid; D002648:Child; D004388:Dura Mater / Q000473:pathology; D005402:Fistula / Q000150:complications* / Q000473:pathology; D006801:Humans; D008202:Lymphangioma / Q000209:etiology* / Q000473:pathology; D012535:Scalp / Q000473:pathology; D012878:Skin Neoplasms / Q000209:etiology* / Q000473:pathology; D012886:Skull / Q000473:pathology; D012887:Skull Fractures / Q000150:complications*