Dr Samiullah Hasan, Dr Chandra Bhushan Singh, Dr Aishwerya Singh


BACKGROUND: The cavum septum pellucidum is a potential space between the two leaflets of septum pellucidum. It is a normal anatomical variant seen in premature and newborn infants and usually disappears with brain maturation. Although moderate cystic dilatation of the cavum septum pellucidum may sometimes be observed, a true cyst is extremely rare with only a handful of reported cases, mostly in children and adolescents.

CASE REPORT: We present a case of arachnoid cyst of the cavum septum pellucidum diagnosed on MRI in a 10 year old girl with the complaint of headache and decreased scholastic performance.

CONCLUSION: Accurate diagnosis of the arachnoid cysts of the cavum septum pellucidum is important as they may cause serious symptoms which can be reversed by surgical treatment.


Arachnoid cyst, septum pellucidum, cavum septum pellucidum, MRI

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