MRI of the Wrist

Marcos Loreto Sampaio, MD; Nicholas M. Kolanko, MD

Disclosures

Appl Radiol. 2014;43(10) 

In This Article

Ganglia

Ganglia are the most common benign tumors of the soft tissues of the hands, found in both the volar and dorsal periarticular topographies. A ganglion is defined as a cyst in contact with a joint capsule or tendon sheath. It contains thick, gelatinous material and a thin capsule, without internal synovial lining. Ganglia may be connected to injured ligaments or demonstrate intra-osseous extension. However, their etiology is still not clear. They present with high signal intensity on fluid-sensitive sequences and low signal on T1-weighted sequences, and they may be complex, with debris, loculations or septations. Not infrequently, ganglia may be occult or incidental, sometimes insinuating through the extrinsic ligaments of the wrist (Figure 19).[34]

Figure 19.

Ganglion cyst. (A) Sagittal GRE T2* reformat and (B) axial T2-weighted images with fat suppression. A dorsal cyst (arrow) insinuates through the dorsal extrinsic ligaments.

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