<prompt> Examination of a patient revealed ipsilateral third nerve paresis and cerebellar ataxia. What is the MOST likely diagnosis?Webers syndromeClaudes syndromeBenedikts syndromeNothnagels syndrome  <response>: In Nothnagels syndrome the area of lesion is superior cerebellar peduncle. These patients presents with ipsilateral third nerve paresis and cerebellar ataxia. In Benedicts syndrome the lesion is in the area of red nucleus. Patients presents with contralateral hemitremor with ipsilateral third nerve paresis. Claudes syndrome has features of both Nothnagels and Benedicts syndrome. In Webers syndrome the lesion is in the coicospinal tract. This leads to ipsilateral third nerve paresis with contralateral hemiparesis. Ref: Textbook of Ophthalmology edited by Sunita Agarwa page 333. 