title: Giant calcifying epithelioma of Malherbe (pilomatrixoma): imaging features.
abstract: We present a case of giant calcifying epithelioma of Malherbe (pilomatrixoma) in the right upper arm of a 62-year-old man. It measured 18 x 12 x 8 cm in size, making it the largest of all the cases reported previously. CT clearly demonstrated a well-defined, subcutaneous mass with amorphous calcifications. The mass showed intermediate signal intensity on T2*-weighted MR images and slight contrast uptake on contrast-enhanced MR images. Histopathologically, this tumor showed no aggressive or malignant nature. The patient is without evidence of recurrence or metastasis 3 years following the resection.
authors.affiliation: Department of Radiology, Yamanashi Medical College, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ichikawa
authors.forename: Y
authors.initials: Y
authors.lastname: Nakajima
authors.forename: H
authors.initials: H
authors.lastname: Fujimoto
authors.forename: A
authors.initials: A
authors.lastname: Koyama
authors.forename: M
authors.initials: M
authors.lastname: Honma
authors.forename: M
authors.initials: M
authors.lastname: Yatsuzuka
authors.forename: K
authors.initials: K
authors.lastname: Ohtomo
authors.forename: G
authors.initials: G
authors.lastname: Uchiyama
authors.forename: S
authors.initials: S
authors.lastname: Ushigome
authors.forename: S
authors.initials: S
authors.lastname: Ohba
mesh_terms: D001132:Arm; D001916:Brachial Artery / Q000000981:diagnostic imaging; D002114:Calcinosis; D006201:Hair Diseases / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D018296:Pilomatrixoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D012878:Skin Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed