Desmoplastic infantile ganglioglioma: a rare tumor with an unusual presentation.

Desmoplastic infantile ganglioglioma (World Health Organization grade I) is a rare neoplasm. Despite their common large size and spectacular radiologic and histologic features, the prognosis after surgical resection is good. We present a new case of this tumor in a 14-month-old boy with a recent history of intracranial hypertension. Magnetic resonance imaging revealed a large tumor involving the left collateral trigone with dilatation of the lateral ventricles. Surgery revealed two separate solid tumors: one in the left falco-tentorial region and the other in the left rolandic area. Microscopic examination showed a proliferation of neoplastic astrocytes in reticulin-rich desmoplastic stroma associated with scattered ganglion cells. One year after surgery follow-up magnetic resonance imaging did not show tumor progression.