title: Intravascular spread of keratoacanthoma. An alarming but benign phenomenon.
abstract: We report a patient with a keratoacanthoma of the scalp in which there was invasion of several medium-sized vessels by the tumour at a distance from the main lesion. A marked inflammatory response within the invaded vessels as well as a benign clinical course do not suggest that this phenomenon represents malignant transformation.
authors.affiliation: Histopathology Department, Institute of Dermatology, London, United Kingdom.
authors.forename: E
authors.initials: E
authors.lastname: Calonje
authors.forename: E W
authors.initials: EW
authors.lastname: Jones
mesh_terms: D001808:Blood Vessels / Q000473:pathology; D006801:Humans; D007636:Keratoacanthoma / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D012535:Scalp; D012536:Scalp Dermatoses / Q000473:pathology*; D012867:Skin / Q000098:blood supply / Q000473:pathology; D012878:Skin Neoplasms / Q000473:pathology*