George Skelton's column "Setting Speakes Straight on a Matter of Presidential Delicacy" (Op-Ed Page, April 20) contained an item of considerable personal interest to me. He mentioned President Reagan's "gradual curling of a finger because of a rare hereditary malady called Dupertron's Contraction."
I and several members of my family also suffer from this disorder, so I am aware that its correct name is Dupuytren's Contracture. It is so rare that I am not surprised at the error in Skelton's article; I have even seen the name misspelled by physicians.
LIONEL M. STERN