Cytotoxic lesions of the corpus callosum (CLOCCs) with a flow gap in straight sinus on magnetic resonance venography.

Cytotoxic lesions of the corpus callosum (CLOCCs) are cytotoxic lesions observed in the splenium of the corpus callosum and are also called mild encephalitis or encephalopathy with reversible splenial lesions or reversible splenial lesion syndrome. It was first reported in patients with epilepsy and since then has been observed in a wide variety of diseases, including infections, trauma, metabolic disorders (hyperglycaemia, hypernatraemia and hyponatraemia), mountain sickness and cerebral venous sinus thrombosis. Here, we present a patient with CLOCCs accompanied by a flow gap in the straight sinus on magnetic resonance venography without any evidence of cerebral venous sinus thrombosis and discuss the possible clinical implications.