Final answer:
A 65-year-old female with a left cerebellar infarct and mass effect on the brain stem and fourth ventricle is at risk for symptoms such as persistent headache, ataxia, sensory deficits causing balance problems, and other neurological symptoms.
Step-by-step explanation:
The patient with a left cerebellar infarct and mass effect on the brain stem and fourth ventricle is at risk for developing various symptoms. These may include persistent headache, ataxia (loss of full control of bodily movements), sensory deficits causing balance problems, problems in gait and station, and potentially other neurological symptoms like memory problems, confusion, and dizziness.
It's important for the patient to receive further medical evaluation and appropriate treatment based on their specific symptoms and diagnosis.