Non-small cell lung carcinoma presenting as carcinomatous meningitis.

Meningeal carcinomatosis is a diffuse infiltration of leptomeninges and sub arachnoid space by malignant cells metastasizing from systemic cancer. Primary bronchogenic carcinoma presenting as carcinomatous meningitis is a very rare occurrence in clinical practice, often occurring during the treatment course of the underlying malignancy. We present this rare presentation in a young non-smoker male.