Unusual Presentation of Prostate Cancer: A Case Report.

Prostate cancer is the second-most common malignancy in males. Despite more frequently metastasizing to the bone, regional lymph nodes, and liver, the brain can also be affected. These metastases can simulate meningiomas, making the diagnosis more difficult. Here, we report the case of a 62-year-old male with a sudden onset of confusion and dysarthria with spontaneous resolution but amnesia for the event. On a neurological exam, the patient had left exophthalmos and palpebral ptosis. He was referred to the emergency room, where he underwent a cranioencephalic CT, which revealed a left anterior temporal lesion with adjacent edema suggestive of meningioma, later confirmed by an MRI. Due to the worsening of the symptoms and an increase in the size of the lesion, total resection was proposed. The anatomopathological study revealed a poorly differentiated carcinoma. To study the primary tumor, a CT of the thorax, abdomen, and pelvis; a spine MRI; and a complementary study with prostate-specific antigen were requested. These studies revealed a prostate adenocarcinoma with brain and bone metastases. After the diagnosis, the patient underwent hormone therapy, chemotherapy, and palliative radiotherapy.