Marcus Gunn Jaw-winking Syndrome Workup

Updated: Jan 24, 2023
  • Author: Barbara L Roque, MD, DPBO, FPAO; Chief Editor: Hampton Roy, Sr, MD  more...
  • Print

Laboratory Studies

Creatine phosphokinase level: If a past medical or family history of any reactions to anesthesia exists, rule out the possibility of malignant hyperthermia prior to any surgery.


Other Tests

Basic tear secretion test: Normal measurement is more than 5-10 mm of Schirmer filter paper wetting after 5 minutes following application of topical anesthetic, such as proparacaine.


Histologic Findings

Light microscopy of surgical specimens usually reveals normal striated muscle. Fibrosis within the muscle has been reported. [16]