<prompt> All of the following clinical findings are seen in Horners syndrome, except:MiosisAnhidrosisHeterochromia of irisApparent exophthalmos  <response>: Ref: Harrisons 18e p 225 The triad of miosis with ipsilateral ptosis and anhidrosis constitutes Horners syndrome, although anhidrosis is an inconstant feature. Brainstem stroke, carotid dissection, and neoplasm impinging on the sympathetic chain occasionally are identified as the cause of Horners syndrome, but most cases are idiopathic. 