title: Posterior migration of Ahmed glaucoma valve tube in a patient with Reiger anomaly: a case report.
abstract: BACKGROUND
  To describe, a yet non-documented complication of GDI surgery (glaucoma drainage incision surgery)--anterior to posterior segment migration of Ahmed Glaucoma Valve (AGV) tube.
  
  
  METHODS
  We report a young 9 year old boy, diagnosed with refractory glaucoma with Reiger anomaly. History included of poor vision in both eyes, left more than right with glare since childhood. He underwent GDI surgery with AGV implantation following which he developed posterior migration of AGV tube. The detailed ocular history, ophthalmic findings, clinical course, surgical management and development of the posterior tube migration is discussed.
  
  
  CONCLUSIONS
  Posterior Migration of AGV tube has yet not been described. Also there is a role of expectant management of the complication in this case as evidenced by the benign course of events.
authors.affiliation: Eye OPD, VMMC and Safdarjung Hospital, New Delhi 110029, India. me_vsgupta@gmail.com
authors.forename: Vishnu S
authors.initials: VS
authors.lastname: Gupta
authors.forename: Harinder S
authors.initials: HS
authors.lastname: Sethi
authors.forename: Malvika
authors.initials: M
authors.lastname: Gupta
authors.forename: Anuj
authors.initials: A
authors.lastname: Mehta
authors.forename: Shivram
authors.initials: S
authors.lastname: Singh
authors.forename: Pankaj
authors.initials: P
authors.lastname: Yadav
authors.forename: K P S
authors.initials: KP
authors.lastname: Malik
mesh_terms: D015783:Aniridia / Q000150:complications*; D000869:Anterior Eye Segment / Q000002:abnormalities*; D002648:Child; D005500:Follow-Up Studies; D005548:Foreign-Body Migration / Q000175:diagnosis*; D020327:Glaucoma Drainage Implants; D005902:Glaucoma, Open-Angle / Q000150:complications / Q000601:surgery*; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D057972:Posterior Eye Segment; D011475:Prosthesis Failure; D014792:Visual Acuity