This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lung Tumors, Subject name: Pathology
Superior sulcus tumor of the lungs characteristically presents with: 
Select and explain. 
A. Horner's syndrome, B. Breathlessness, C. Hemoptysis, D. Sweating
A: Horner's syndrome
Answer: A: Horner's syndrome 
Explanation: Ans: A. Ref: Robbins Pathologic Basis of Disease, 8th edition Explanation: Apical lung cancers in the superior pulmonary sulcus tend to invade the neural structures around the trachea, including the cervical sympathetic plexus. It produces a group of clinical findings that includes severe pain in the distribution of the ulnar nerve and Horner syndrome (enophthal- mos, ptosis, miosis, and anhidrosis) on the same side as the lesion. Such tumors are also referred to as Pancoast tumors.