<prompt> In leprosy neural involvement occurs in what percentage of patients306090100  <response>: A chronic granulomatous disease caused by Mycobacterium leprae, principally affecting peripheral nerves and skin. Nerve involvement is seen in all cases of leprosy. The cardinal signs are: 1. Hypopigmentedhypoanaesthetic patches 2. Peripheral nerve thickening 3. Skin slit smearAFB. 