Benign Soft Tissue and Osseous Tumours of the Hand: a Pictorial Essay

Epidermoid inclusion cyst in a 53-year-old man whopresented with left index finger mass: (a) Sagittal T2-weightedmagnetic resonance image showing a lobulated circumscribedmass (arrow) over the volar aspect of the index finger, at the distalphalangeal level with homogeneous hyperintense signal and thinhypointense internal septum. (b) Post-contrast T1-weighted axialmagnetic resonance image showing mild peripheral incompleterim enhancement while its internal content remains non-enhancing. Giant Cell Tumours of the Tendon Sheath Tenosynovial giant cell tumours are a group of generally benign soft tissue tumours with common histological findings. Giant cell tumour of tendon sheath in a 48-year-oldwoman who presented with right thumb nodularity: (a) T2-weightedfat-saturated axial magnetic resonance image showing multi-lobulatedlesion (arrow) at the volar aspect of the thumb at theinterphalangeal level with intermediate signal intensity. Neurogenic tumour in a 68-year-old woman who presented with first webspace nodule: (a) T2-weighted axial magnetic resonanceimage showing an oval hyperintense lesion (arrow) in the subcutaneous tissue of the dorsal aspect of the first webspace. (b) T1-weightedpost-contrast fat-saturated magnetic resonance image showing corresponding contrast enhancement.