PMC7475744_01
Anteroposterior and lateral views of the right forearm demonstrating ring and arc calcifications in the distal forearm at the interosseous area in close proximity to the metadiaphysial region of the ulna.
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Plain X-ray showed ring and arc type calcifications in the distal forearm at the interosseous area, in close proximity to the metadiaphyseal region of the ulna (Figure 1). Mitotic figures were noted occasionally (<1/10 hpf).
MRI showing a well-defined contrast-enhanced image of a soft tissue lesion in the forearm. (a) T1W: hypointense. (b) T2W/STIR: hyperintense. (c) Post contrast.
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A diagnosis of a peripheral nerve sheath tumour was also suggested based on the MRI (Figure 2).
Histology showing intersecting fascicles of spindle cells with elongated nuclei and eosinophilic cytoplasm. Stromal calcification is also seen (H&E stain, x100).
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Histology showed a circumscribed unencapsulated lesion composed of intersecting fascicles of spindle cells with elongated nuclei and eosinophilic cytoplasm in the H&E stain (Figure 3).