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Magnetic resonance imaging of pilomatricoma
L H De Beuckeleer1, A M De Schepper, I Neetens
1Department of Radiology, University Hospital of Antwerp, Edegem, Belgium.
Abstract:
Two patients (a 16-month-old boy and a 53-year-old man) were referred for MR imaging of a small, subcutaneous nodule at the forearm. Plain films were available in one patient and showed a non-specific well-circumscribed lesion. Upon ultrasonography (1 patient), a nodular, well-circumscribed, hyperechoic lesion was seen. In both cases spin-echo (SE) T1-weighted images (T1WI) showed homogeneous, intermediate signal intensity (SI). On gadolinium-enhanced T1WI (1 patient), no enhancement was observed. Both lesions showed predominant low-to-intermediate SI on T2WI. At histological examination characteristic findings of pilomatricoma were observed.