Digital mixoid cyst
Background
- Also known as digital mucous cyst or mixoid pseudocyst
- Collection of gelatinous material on finger, from degeneration of connective tissue
- Typically affects DIP joint, with swelling over distal phalanx
Clinical Features
- Swelling to distal finger, usually radial aspect +/- pain
- Aspiration yields clear, gelatinous fluid
- May communicate with joint space
Differential Diagnosis
Evaluation
- Swelling to distal finger
- May cause longitudinal depressed groove in nail plate
Workup
- XR of digit may be useful to show joint degeneration, but not required
Management
- Aspiration or I&D
- Digital compression
- May require surgical excision if recurring
Disposition
- Discharge