Final answer:
The first step for patients with brain lesions post-CT scan is medical assessment, including clinical history and CT image evaluation. The exception is neurocysticercosis, which requires immediate antiparasitic treatment.
Step-by-step explanation:
The first step in patients presenting with a brain lesion following a CT scan usually involves a comprehensive assessment by medical professionals, which can include evaluating the patient's clinical history, physical examination, and reviewing the CT images for characteristics of the lesion such as its size, location, and the extent of surrounding tissue involvement. The aim is to determine the nature of the lesion, whether it might be benign or malignant, and formulate a plan for further diagnostic tests or treatment.
However, there is an exception to this initial step. If a patient has a brain lesion caused by neurocysticercosis, as indicated by multiple cysts visible on CT scans (Figure 26.26), the treatment may start more immediately with specific antiparasitic medications along with supportive care to manage symptoms.