GGT is mainly present in kidney, liver, and pancreatic cells, but small amounts are present in other tissues. Optic atrophy MedGen UID: 18180 •Concept ID: C0029124 • Disease or Syndrome Atrophy of the optic nerve. [ncbi.nlm.nih.gov]

PMID: 18206410Free PMC Article Prognosis Koller A, Fazzini F, Lamina C, Rantner B, Kollerits B, Stadler M, Klein-Weigel P, Fraedrich G, Kronenberg F J Intern Med 2020 May;287(5):569-579. Epub 2020 Feb 9 doi: 10.1111/joim.13027. [ncbi.nlm.nih.gov]

Persistent head lag Poor eye contact Progressive neurologic deterioration Spasticity Abnormality of the respiratory system Respiratory failure Respiratory insufficiency Ear malformation Sensorineural hearing loss disorder Growth abnormality Failure to thrive Etiology [ncbi.nlm.nih.gov]