Resected fragments of a brain tumor, and in this case the very dark appearance supports a diagnosis of metastatic pigment-forming melanoma. Brain imaging (neuroimaging such as CT or MRI) is needed to determine the presence of<unk> . In particular, contrast-enhanced MRI is the best method of diagnosing<unk> , though detection is primarily done by CT. Biopsy is often recommended to confirm diagnosis. The diagnosis of<unk>  typically follows a diagnosis of a systemic cancer. Occasionally,<unk>  will be diagnosed concurrently with a primary tumor or before the primary tumor is found. In<unk>  due to malignant melanoma, MRI imaging showed high T1 and low T2 intensity due to the deposition of melanin in the brain. In susceptibility weighted imaging (SWI), it usually shows abnormal SWI hypointensity in larger proportion than<unk>  caused by breast carcinoma.
Brain metastasis
Brain abscess
Leptomeningeal cancer
Central nervous system cavernous hemangioma
Coma
Brainstem glioma
Subdural empyema
Brain tumor