Info
Descriptions of skin manifestations of seronegative spondyloarthritis
- Psoriasis:
- Erythematous plaques with sharply defined margins
- Often with thick silvery scale
- Circinate balanitis:
- Shallow, painless ulcers of glans penis and urethral meatus
- Keratoderma blennorrhagica:
- Hyperkeratosis of palms/soles, scrotum, trunk, scalp
- Erythema nodosum:
- Red tender nodules in subcutaneous fat (panniculitis)
- Typically on shins
- Differential diagnosis includes
- idiopathic,
- infection,
- sarcoidosis,
- drug reaction,
- vasculitis,
- Inflammatory Bowel Disease (IBD),
- and lymphoma
- Pyoderma gangrenosum