Magnetic Resonance Imaging Findings of Desmoplastic Fibroblastoma: A Report of Two Cases

Abstract

This report describes differrented magnetic resonance imaging (MRI) findings of two cases of desmoplastic fibroblastoma. Case 1 was a 25-year-old male referred to our clinic for a mass on his right arm. The mass was iso-intensity on T1-weighted images and mixed low and high intensity on T2-weighted images. T1-weighted images after Gd showed inhomogeneous enhancement. Case 2 was a 34-year-old man with a mass in the deltoid muscle. The mass was iso-and low-intensity on T1-weighted images, and low intensity on T2-weighted images. T1-weighted images after Gd showed inhomogeneous enhancement and the rim area was more enhanced. Previous reports indicate that on MR imaging, low density areas represent areas of low cellularity with abundant collagen content, and high density areas represent areas of high cellulality. Our findings suggest that desmoplastic fibroblastoma shows various patterns of cellularity and myxoid matrix on T2-weighted images.