mask phenomenon

Post-emetic purpura that follows prolonged vomiting—‘retching’—appearing as evanescent punctate macules on the face/upper neck, thought to be due to abruptly increased intrathoracic pressure; similar lesions occur in violent coughing, Valsalva maneuver, or strangulation, accompanied by conjunctival petechiae

Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

mask phenomenon

Post-emetic purpura that follows prolonged vomiting–'retching', appearing as evanescent punctate macules on the face/upper neck, thought to be due to abruptly ↑ intrathoracic pressure; similar lesions occur in violent coughing, Valsalva maneuver, or strangulation, and accompanied by conjunctival petechiae

McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.