Magnetic resonance arachnoid cyst pending exclusion is usually a descriptor of an imaging test that suggests that further testing is needed to rule out an arachnoid cyst after an MRI.
Intracranial arachnoid cysts are benign, non-neoplastic cystic space-occupying lesions outside the brain parenchyma, which are formed by the arachnoid cyst wall encasing colorless, transparent cerebrospinal fluid.
The causes of arachnoid cysts include congenital factors and encephalitis, etc. Since magnetic resonance imaging (MRI) is not sufficient to determine arachnoid cysts, further investigations, such as enhanced cranial MRI, are needed to make a definitive diagnosis.
Most of the arachnoid cysts do not have any clinical symptoms, and their growth rate is relatively slow, so no special treatment is needed. If the arachnoid cysts increase rapidly within a short period of time and press on the brain tissue, then it is necessary to go to the hospital in time for examination and treatment.