"Tumour necrosis factor receptor-associated periodic syndrome (or sometimes abbreviated as TRAPS) is a condition characterised by recurrent (periodic) episodes of fever as well as a spectrum of dermatologic findings that includes migratory patches, oedematous plaques, periorbital oedema, and/or conjunctivitis."
"It is characterised by a perivascular dermal infiltrate of lymphocytes and monocytes. Its thought to be dominantly inherited mutations in TNFRSF1A, the gene encoding the 55-kDa tumour necrosis factor (TNF) receptor."