title: Phenylephrine-induced microvascular occlusion syndrome in a patient with a heterozygous factor V Leiden mutation.
abstract: BACKGROUND
  Cutaneous microvascular occlusion syndromes (MOS) present with noninflammatory retiform purpura with variable outcomes that are dependent on the severity, duration, and specific underlying cause. Transient cases are often associated with few sequelae, while severe forms such as symmetrical peripheral gangrene may be associated with amputation and death.
  
  
  METHODS
  A middle-aged man developed MOS after exposure to phenylephrine hydrochloride and experienced complete resolution when treatment with the vasopressor was discontinued. Further evaluation detected a previously subclinical heterozygous factor V Leiden mutation.
  
  
  CONCLUSIONS
  We propose that phenylephrine-mediated vasoconstriction superimposed on an underlying thrombotic predisposition precipitated the transient MOS. The role of vasopressors in the development of cutaneous MOS is well documented in the critical care literature; however, it is underrepresented in the dermatologic literature, and, to our knowledge, there are no reports of phenylephrine use inducing MOS. We hope to raise awareness of the potential role of vasopressor medications in causing MOS.
authors.affiliation: Division of Dermatology, Department of Medicine, University of Louisville, 310 E Broadway, Floor 2A, Louisville, KY 40202, USA. akalajian@yahoo.com
authors.forename: Andrew H
authors.initials: AH
authors.lastname: Kalajian
authors.forename: Klark B
authors.initials: KB
authors.lastname: Turpen
authors.forename: Kristin O
authors.initials: KO
authors.lastname: Donovan
authors.forename: Janine C
authors.initials: JC
authors.lastname: Malone
authors.forename: Jeffrey P
authors.initials: JP
authors.lastname: Callen
mesh_terms: D003251:Constriction, Pathologic; D004334:Drug Administration Schedule; D005165:Factor V / Q000235:genetics*; D006579:Heterozygote; D006801:Humans; D008297:Male; D008833:Microcirculation / Q000187:drug effects; D008875:Middle Aged; D009154:Mutation; D010656:Phenylephrine / Q000008:administration & dosage / Q000009:adverse effects*; D012074:Remission Induction; D012867:Skin / Q000098:blood supply*; D014652:Vascular Diseases / Q000139:chemically induced* / Q000235:genetics* / Q000473:pathology; D014662:Vasoconstrictor Agents / Q000008:administration & dosage / Q000009:adverse effects*
chemical_list: D014662:Vasoconstrictor Agents; C095381:factor V Leiden; D010656:Phenylephrine; D005165:Factor V