This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
Person having cerebellar signs on the same side with hearing loss. Site of damage is 
Select and explain. 
A. Left cerebellopontine angle, B. Left pons, C. Left medulla, D. Middle ear
A: Left cerebellopontine angle
Answer: A: Left cerebellopontine angle 
Explanation: (A) Left cerebellopontine angle # CEREBELLOPONTINE ANGLE TUMORS:> Tumors within the nerve canaliculi initially present with unilateral sensorineural hearing loss, unilateral tinnitus, or disequilibrium (vertigo is rare, on account of the slow growth of neuromas).> Speech discrimination out of proportion to hearing loss, difficulty talking on the telephone are frequent accompaniments.> Tumors extending into the CPA will likely present with disequilibrium or ataxia depending on the amount of extension on the brainstem.> With brainstem extension, midfacial and corneal hypesthesia, hydrocephalus, and other cranial neuropathies become more prevalent.> Cerebellopontine angle (CPA) tumors are the most common neoplasms in the posterior fossa, accounting for 5-10% of intracranial tumors.> Most CPA tumors are benign, with over 85% being vestibular Schwannomas (acoustic neuromas), lipomas, vascular malformations, & hemangiomas.> Most frequent non acoustic CPA tumors are meningiomas, epidermoids (primary cholesteatomas), and facial or lower cranial nerve Schwannomas.> Primary malignancies or metastatic lesions account for less than 2% of neoplasms in the CPA.> Presenting symptoms of CPA tumors (including acoustic neuromas) include the following: Hearing loss - 95% Tinnitus - 80% Vertigo/unsteadiness - 50-75% Headache - 25% Facial hypesthesia - 35-50% Diplopia-10%> Presenting symptoms can vary according to the size and location of the lesion.