1. History
  2. Exam
  3. Photos
  4. Diagnosis
  5. Teaching Points
  6. Comments

Case 2 Diagnosis

Cone-rod dystrophy

Differential Diagnosis

  • Cone dystrophy: less likely given impaired rod function
  • Chloroquine or other toxicity: negative based on history
  • Pattern dystrophy: ERG is usually nearly normal
  • Stargardt’s: ERG should be nearly normal
  • Neuronal ceroid lipofuscinosis: may present with bulls-eye maculopathy and cone dysfunction but have progressive neurologic failure and death by 20 years
Last Modified: Friday, 27-Jun-2008 10:30:21 EDT