<prompt> A 32 years lady present with shoulder tip pain and diagnosis is pan coast tumour and presents with miosis. Diagnosis isHorner syndromeThoracic outlet syndromeAberrant right subclan aeryUpper trunk of brachial plexus injury  <response>: Pan-coast tumor can cause compression of sympathetic ganglion resulting in Horner syndrome. These tumors are associated with Pancoast syndrome, characterized by pain, that may arise in shoulder chest wall characteristically radiates to ulnar surface of hand Features of Horners syndrome: P - Ptosis M - Miosis E - Enophthalmos A- Anhidrosis L - Loss of ciliospinal reflex 