title: Calcified desmoplastic fibroblastoma of the foot: imaging findings.
abstract: We report a case of desmoplastic fibroblastoma (DF) of the foot in a 65-year-old woman. The tumor presented as a slow-growing, painless mass located in the first intermetatarsal space of the right foot. Ultrasound showed a well-circumscribed hypoechoic lesion containing hyperechoic calcifications confirmed on standard radiographs. At magnetic resonance imaging (MRI), the mass appeared isointense to the muscles on T1-weighted (T1W) images, hyperintense on proton-density-weighted fat-saturated images, and presented scattered internal hypointense foci. Post-contrast T1W spectral presaturation with inversion recovery (SPIR) images showed heterogeneous, mostly peripheral, contrast enhancement. DF must be considered in the differential diagnosis of soft-tissue calcified tumors of the foot.
authors.affiliation: Studio Radiologico Urigo, Sassari, Italy. curigo@sirm.org.|CIM SA Cabinet Imagerie Medicale, Route de Malagnou 40a, Geneva, Switzerland. curigo@sirm.org.
authors.forename: Carlo
authors.initials: C
authors.lastname: Urigo
authors.affiliation: Cabinet de Rhumatologie, Rue de la Faïencerie 6, 1227, Carouge, Switzerland.
authors.forename: Marie Claude
authors.initials: MC
authors.lastname: Schenkel
authors.affiliation: Center for Surgery of the Foot & Ankle, Clinique La Colline, Geneva, Switzerland.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Assal
authors.affiliation: CIM SA Cabinet Imagerie Medicale, Route de Malagnou 40a, Geneva, Switzerland.
authors.forename: Stefano
authors.initials: S
authors.lastname: Bianchi
mesh_terms: D000368:Aged; D002114:Calcinosis / Q000000981:diagnostic imaging* / Q000601:surgery*; D003937:Diagnosis, Differential; D005260:Female; D018220:Fibroma, Desmoplastic / Q000000981:diagnostic imaging* / Q000601:surgery*; D005528:Foot / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D012983:Soft Tissue Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery*; D014463:Ultrasonography
keywords: Calcification; Desmoplastic fibroblastoma; Foot; Pathological; Soft-tissue tumors; Ultrasound