Soft tissue chondroma of the thumb mimicking a glomus tumor

A 28-year-old man presented with a 12-year history of a right thumbnail deformity and a two-year history of pain. Clinical examination revealed an 8×8 mm pale, reddish, tender mass beneath the posterior nail fold. The overlying nail plate was flattened. Magnetic resonance imaging (MRI) showed a well-defined lesion with homogeneous low signal intensity on T1-weighted images and high signal intensity on T2-weighted images, with marginal enhancement. Based on Carroll's classic triad - pain, localized tenderness, and cold sensitivity - and the subungual location, a glomus tumor was clinically suspected. [...].