Digital flexor tendon sheath ganglions
Firm, moderately tender masses at the 3rd and 5th finger. Normal appearing skin.
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Smoothly marginated lesions at the proximal phalanges III (mediallly) and V (laterally) with fluid equivalent signal, each adjacent to the respective flexor sheaths.
Ganglion cysts of the finger flexor tendons occur more often in women (2.6:1). The middle finger is most commonly affected. The are located at the A1 and A3 pulleys in 69% of cases1. This is why they are also referred to as annular ligament cysts. On ultrasound, more than half show complex echogenicity2.
- Abe Y, Watson HK, Renaud S. Flexor tendon sheath ganglion: analysis of 128 cases. Hand Surg. 2004;9 (1): 1-4. - Pubmed citation
- Teefey SA, Dahiya N, Middleton WD et-al. Ganglia of the hand and wrist: a sonographic analysis. AJR Am J Roentgenol. 2008;191 (3): 716-20. doi:10.2214/AJR.07.3438 - Pubmed citation