title: A case of pseudocyanosis.
abstract: Cyanosis is an ominous physical sign indicating significant cardiac or respiratory disease. However, bluish discolouration mimicking cyanosis could occur in methaemoglobinaemia. The clinical implications being very different, it is important that the aetiology of bluish discolouration of tissues is correctly identified. A case is reported where the antianginal agent nicorandil was identified as the most likely cause for methaemoglobinaemia.
authors.affiliation: Institute of Cardiology, National Hospital of Sri Lanka, Colombo, Sri Lanka.
authors.forename: Ruvan A I
authors.initials: RA
authors.lastname: Ekanayaka
mesh_terms: D000368:Aged; D003490:Cyanosis / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008708:Methemoglobinemia / Q000139:chemically induced / Q000175:diagnosis*; D020108:Nicorandil / Q000009:adverse effects; D010092:Oximetry; D012880:Skin Pigmentation; D014665:Vasodilator Agents / Q000009:adverse effects
chemical_list: D014665:Vasodilator Agents; D020108:Nicorandil