title: [Choroid fundus as protective factor in the development of diabetic retinopathy].
abstract: OBJECTIVE
  To identify whether tessellated fundus unrelated to myopia modifies the rate of diabetic patients with retinopathy.
  
  
  METHODS
  Diabetic patients evaluated ophthalmoscopically for the first time from September 1998 to December 1999 were retrospectively reviewed, and the presence of diabetic retinopathy was compared with those with tessellated fundus (group 1) and without (group 2). Duration of diabetes and presence of retinopathy were evaluated. Differences were analysed with x2.
  
  
  RESULTS
  621 patients were evaluated, 138 of whom (22%) had tessellated fundus. The rate of patients with diabetic retinopathy was statistically lower in group 1 than in group 2 (p = 0.00); this difference was maintained after correction for cumulated diabetes duration.
  
  
  CONCLUSIONS
  The presence of tessellated fundus was associated with a lower rate of patients with diabetic retinopathy and with delayed onset. Manifestations of diabetic retinopathy in patients with tessellated fundus might have a different expression, and this expression might not necessarily reflect the microvascular status of the patient.
authors.affiliation: Servicio de Oftalmología, Hospital Juárez de México.
authors.forename: V
authors.initials: V
authors.lastname: Lima-Gómez
authors.forename: J A
authors.initials: JA
authors.lastname: Rojas-Dosal
authors.forename: N
authors.initials: N
authors.lastname: León-Rivera
mesh_terms: D002829:Choroid / Q000473:pathology; D003930:Diabetic Retinopathy / Q000209:etiology*; D006801:Humans; D011379:Prognosis; D012189:Retrospective Studies; D013997:Time Factors