Finger mass Within the volar soft tissues of the fifth digit at the level of the mid diaphysis of the proximal phalanx is a well-defined dumbbell-shaped lesion measuring approximately 1 x 1 x 1 cm. This lesion demonstrates homogeneously high signal intensity on T2-weighted sequences, homogeneously low signal intensity on T1-weighted sequences and demonstrates minimal if any peripheral enhancement. No additional lesions are identified.The underlying flexor tendon is normal in signal intensity and caliber. The marrow signal of the fifth digit is also normal. A small focus of signal abnormality within the head of the first metacarpal may represent a small cyst or other benign entity.
Well-circumscribed mass within the volar soft tissues overlying the proximal phalanx of the fifth finger demonstrates imaging characteristics most consistent with a ganglion cyst.