scaly eruption

Gottron's sign is an erythematous, scaly eruption occurring in symmetric fashion over the MCP and interphalangeal joints (can mimic psoriasis).

Any man who broke out in nodes that turned to ulcers, or pallid, scaly eruptions of the skin, or running sores, was set down as a leper, though Cadfael had his suspicions that many such cases arose from uncleanliness, and many others from too little and too wretched food.