Plantar fibromatosis: a benign aggressive neoplasm with a characteristic appearance on MR images.
OBJECTIVE
To define the magnetic resonance (MR) imaging characteristics of plantar fibromatosis.


METHODS
Sixteen patients (19 feet) with proved plantar fibromatosis underwent preoperative MR imaging at 1.5 T. A control group of 19 people (24 feet) also underwent MR imaging.


RESULTS
Twenty-seven lesions (mean size, 2.2 x 1.0 cm) were identified. All had infiltrative upper margins. Four (15%) of the 27 grew deep to the aponeurosis; 25 (92%) exhibited some signal intensity heterogeneity. All 27 of the lesions on T1-weighted conventional spin-echo (SE) images, seven (78%) of the nine on T2-weighted conventional SE images, and 17 (94%) of the 18 on T2-weighted fast SE images were isointense to minimally hyperintense (to the signal intensity of adjacent muscle). Five (83%) of the six lesions on short inversion time inversion-recovery images were hyperintense. Enhancement was variable on contrast material-enhanced images; nine (60%) of the 15 lesions on these images showed marked enhancement.


CONCLUSIONS
Plantar fibromatosis is a benign but infiltrative neoplasm with a characteristic location and appearance on MR images.
Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA 19107.
W B
WB
Morrison
M E
ME
Schweitzer
K L
KL
Wapner
R D
RD
Lackman
D003287:Contrast Media; D004338:Drug Combinations; D005260:Female; D005350:Fibroma / Q000175:diagnosis*; D005528:Foot / Q000473:pathology; D005534:Foot Diseases / Q000175:diagnosis*; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008536:Meglumine; D008875:Middle Aged; D009942:Organometallic Compounds; D004369:Pentetic Acid / Q000031:analogs & derivatives; D012189:Retrospective Studies; D012983:Soft Tissue Neoplasms / Q000175:diagnosis*
D003287:Contrast Media; D004338:Drug Combinations; D009942:Organometallic Compounds; D008536:Meglumine; D004369:Pentetic Acid; D019786:Gadolinium DTPA