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Figure 1: (a) Axial T1WI MRI of the right lower arm showing a hyperintense lesion in relation to the ulnar nerve. (b) Coronal fat-suppressed T2WI of right elbow shows a hyperintense lesion on the ulnar aspect of the lower arm in relation to ulnar nerve. (c) Histopathological examination shows a well-encapsulated lesion with large areas of central necrosis (H and E, × 4). (d) Peripheral area shows ill-formed epithelioid cell granulomas admixed with lymphocytes (H and E, × 20). T1WI = T1-weighted imaging, T2WI = T2-weighted imaging, H and E = hematoxylin and eosin

Figure 1: (a) Axial T1WI MRI of the right lower arm showing a hyperintense lesion in relation to the ulnar nerve. (b) Coronal fat-suppressed T2WI of right elbow shows a hyperintense lesion on the ulnar aspect of the lower arm in relation to ulnar nerve. (c) Histopathological examination shows a well-encapsulated lesion with large areas of central necrosis (H and E, × 4). (d) Peripheral area shows ill-formed epithelioid cell granulomas admixed with lymphocytes (H and E, × 20). T1WI = T1-weighted imaging, T2WI = T2-weighted imaging, H and E = hematoxylin and eosin