Muckle-Wells syndrome in the setting of basal cell nevus syndrome.

Muckle-Wells syndrome (MWS) is a rare disorder inherited in an autosomal-dominant fashion that belongs to a group of hereditary periodic fever syndromes. It specifically belongs to the cryopyrin-associated periodic syndromes (CAPSs) in which there is a mutation in the NLRP (NLR family pyrin domain containing 3) gene that leads to overproduction of IL-1β, the source of the multisystem inflammatory symptoms. Muckle-Wells syndrome is characterized by a recurrent urticarial eruption that is associated with episodic fever, myalgia, arthralgia, malaise, progressive sensorineural hearing loss, and amyloid nephropathy (the most severe complication). Basal cell nevus syndrome (BCNS), or Gorlin syndrome, is a rare, autosomal-dominant inherited genodermatosis linked to a mutation in the PTCH (patched 1) gene and is characterized by a broad range of anomalies. We report the case of a patient with MWS and BCNS in whom basal cell carcinoma (BCC) treatment was complicated by symptoms of MWS.