Doi's sign is a clinical sign in which absent deep tendon reflexes can be elicited after a short period of maximal muscle contraction. This occurs in patients with Eaton-Lambert syndrome, but is not seen in patients with neuropathy.Jane M. Orient, Joseph D. Sapira. Sapira's art & science of bedside diagnosis, 3rd edition, page 610. Google books
The sign is named after Hitoka Doi, M.D., who described it in 1978.
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