Abstract
The case of a ganglion cyst in the pulp of a fifth finger in an elderly woman initially mimicking a soft tissue tumor is described. Most typical sites of ganglion cysts are well documented at the wrist and in the vicinity of inter-phalangeal and metacarpo-phalangeal joints. In this case, ultrasonography (US) and magnetic resonance imaging (MRI) demonstrated a cystic lesion within the pulp of the fifth finger and indicated carpal osteoarthritis as the distant—and unexpected—origin of the lesion. The suggested diagnosis of ganglion cyst was confirmed by computed tomography arthrography (CT arthrography) of the wrist, which showed opacification of the cyst on delayed acquisitions after intra-articular injection into the mid-carpal joint, through the fifth flexor digitorum tendon sheath. The communications between the degenerative carpal joint, the radio-ulnar bursa, the fifth flexor digitorum tendon sheath and the pedicle of the cyst were well demonstrated.
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Bouilleau, L., Malghem, J., Omoumi, P. et al. Pseudotumoral ganglion cyst of a finger with unexpected remote origin: multimodality imaging. Skeletal Radiol 39, 375–379 (2010). https://doi.org/10.1007/s00256-009-0816-5
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DOI: https://doi.org/10.1007/s00256-009-0816-5