Age / Sex : 53 / F

Age / Sex : 37 / M

Chief complaint : palpable mass

GCTTS

Discussion

Findings :

Simple

-       soft tissue mass with bone erosion in volar and ulnar aspect of the middle phalax of the 2^nd finger

MRI

-       well defined mass in the volar and ulnar aspect of the middle phalax of the 2^nd finger with low to intermediate signal intensity on T1WI, slight high signal intensity on T2WI

-       mass attached to bone and flexor tendon

-       erosion of bone

-       no visible enhancement of mass

Differential Diagnosis :

Diagnosis : giant cell tumor of tendon sheath

Discussion:

•      Different form of synovial proliferation with PVNS;  similar histologic finding

•      Localized and diffuse form

•      Common site ; finger

•      R/F ; soft tissue swelling or mass with or without erosion of adjacent bone

•      MR ; variable ; low SI on T1&T2WI (hemosiderin, fibrous tissue) 
      enhancement(+)

•      2^nd most common soft tissue tumor of the hand and wrist

•      Often in middle-aged women

References:

Shankman S, Kolla S, Beltran J;

 MR imaging of tumors and tumor-like lesion of the upper extremity

 Magn Reson Imaging Clin N Am 2004; 12; 349-359

Chung CB, Steinbach LS;

 MRI of the upper extremity, LWW

Resnick : Diagnosis of Bone & Joint disorders, Saunders