Apparent late‐onset Cockayne syndrome and interstitial deletion of the long arm of chromosome 10 (del(10)(q11.23q21.2))

Abstract We present the history and data on a 24‐year‐old man with clinical and neurological symptoms similar to the findings in patients with late‐onset Cockayne syndrome. Prometaphase chromosome studies documented an interstitial 10q211 deletion in all cells. This finding may indicate that the gene for late Cockayne syndrome is at 10q211.