Bilateral leg swelling + rash | Figure 1

Bilateral leg swelling + rash

50 yom, 1 week hx bilateral leg swelling + erythema + pain. Also having flare of chronic bloody diarrhoea, previously investigated for IBD/colitis but histo equivocal. Refractory hypertension on multiple agents needing further work-up, and complex surgical history including nec fasc 10 years ago. No new drugs. On exam is well with scaly papulopustulat rash on anterior shins, well dermacated, tender, slightly violaceous edge, grey centre, calves very tense, not pruritic. Bloods essentially normal - CRP 5.6, platelets 371, elevated d-dimer but DVT scan normal. Awaiting venous duplex. Is this pyoderma gangrenosum / venous insufficiency/ atypical psoriasis or something else? Plan currently is to biopsy.