RadioGraphics
The glomus tumor is a benign neoplasm derived from the neuromyoarterial glomus (49). It is located in the soft tissue related to the terminal phalanx of the hand. Glomus tumors affect adults in the 4th 5th decades of life and cause joint tenderness and pain.
At radiography, a glomus tumor is seen as a soft-tissue mass, typically along the dorsal surface of the finger, either medially or laterally. In 15% 65% of cases, extrinsic bone erosion or invasion of bone may be seen, often with a sclerotic border reflecting a slowly enlarging process (Figure 13) (5). US reveals a hypoechoic mass, although small subungual lesions may be missed (50). CT shows a nonspecific subungual mass with soft-tissue attenuation. On T2-weighted MR images, these lesions usually have very high signal intensity and are homogeneous (51).