Infants with Tay-Sachs disease appear to develop normally for the first few months of life. Then, as nerve cells become distended with fatty material, a relentless deterioration of mental and physical abilities occurs. The child becomes blind, deaf, and unable to swallow. Muscles begin to atrophy and paralysis sets in.nfants with Tay-Sachs disease appear to develop normally for the first few months of life. Then, as nerve cells become distended with fatty material, a relentless deterioration of mental and physical abilities occurs. The child becomes blind, deaf, and unable to swallow. Muscles begin to atrophy and paralysis sets in.
The following medical conditions are some of the possible causes of Behind knee pain. There are likely to be other possible causes, so ask your doctor about your symptoms. 1  Diabetes. 2  Patellofemoral syndrome. 3  Patellar Subluxation dislocation. 4  Articular cartilage injury. 5  Bakers cyst. 6  Meniscal disorders.
Finding the Cause. 1  Location: Where on the knee the patient feels pain can offer some clues about what type of injury or condition is causing the pain. 2  Timing: Just as the location of knee pain may indicate what's causing the problem, the time of day the patient experiences the pain can also offer insight.