title: An unusual cause for cyanosis.
abstract: Cyanosis is a common physical sign in clinical medicine. Cardiac or respiratory conditions are the usual causes. We report a patient with an unusual cause for cyanosis and highlight the salient clues that lead to the diagnosis.
authors.affiliation: Department of Cardiology, Singapore General Hospital.
authors.forename: K H
authors.initials: KH
authors.lastname: Mak
authors.forename: A T
authors.initials: AT
authors.lastname: Tan
authors.forename: E
authors.initials: E
authors.lastname: Jacob
authors.forename: L F
authors.initials: LF
authors.lastname: Chio
mesh_terms: D000328:Adult; D003490:Cyanosis / Q000209:etiology*; D006801:Humans; D008297:Male; D008708:Methemoglobinemia / Q000151:congenital*; D010375:Pedigree