Digital Myxoid Cyst

Diagnosis: Digital Myxoid Cyst

Digital mucous cyst at proximal nail fold with longitudinal grooving or depression of the nail plate.

Clinical Presentation

Digital mucous cyst at proximal nail fold with longitudinal grooving or depression of the nail plate.

Clinical History

Submitted by Alaa Saad. Originally posted September 20, 2010.

Treatment

See case discussion.

Differential Diagnosis

• Epidermal inclusion cyst • Ganglion cyst • Giant cell tumor of tendon sheath • Gout (tophus)

Key Learnings

• Also called myxoid pseudocyst or digital mucous cyst • Translucent, dome-shaped, fluctuant nodule on dorsal distal finger near nail • Contains viscous, jelly-like mucinous material • Associated with osteoarthritis (DIP joint) • Can cause longitudinal nail grooving by compressing nail matrix • Not a true cyst (no epithelial lining)

Tags: digital, myxoid, cyst, alaa saad