The crocodile tear syndrome.
Gusto-lacrimation, or "crocodile tear syndrome," is a rare complication, with 95 cases reported in the literature. Two patients are presented here, one after a facial fracture which apparently extended into the temporal bone proximal to the optic ganglion, and one after a Bell's palsy. The mechanism appears to be a misdirection of regenerating gustatory fibers destined for the salivary glands, so that they become secretory fibers to the lacrimal gland and cause homolateral tearing while the patient is eating. A simple procedure, involving subtotal resection of the palpebral lobe of the involved lacrimal gland, proved to be an effective corrective measure in these cases. Although it was not done in these cases, it would perhaps be advisable to do a Schirmer's test to assist in determining the amount of gland to be removed.
D000328:Adult; D004435:Eating; D005151:Facial Injuries / Q000150:complications; D005158:Facial Paralysis / Q000150:complications*; D005260:Female; D050723:Fractures, Bone / Q000150:complications; D006801:Humans; D007765:Lacrimal Apparatus / Q000294:innervation; D007766:Lacrimal Apparatus Diseases / Q000209:etiology* / Q000601:surgery; D009416:Nerve Regeneration; D012469:Salivary Glands / Q000294:innervation; D013577:Syndrome; D013666:Tears / Q000378:metabolism*; D013701:Temporal Bone / Q000293:injuries*