Temporal lesions

Cystic or calcified metastases favor lung, breast and gastrointestinal primary sites. Hematogeneous spread is common for metastases in the brain parenchyma. Direct tumour extension can occur from the calvarium to the dura, e.g. in prostatic carcinoma, directly through the skull-base, via foramina and fissures, e.g. in nasopharyngeal carcinoma ... ................
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