The authors report an exceptional case of primary malignant non-Hodgki
n's lymphoma of cranial vault, with intra(extra-dural)-extra-craial ex
tension. The duration of symptomatology before surgery was six months.
The main clinical and radiological particularities were : large soft-
tissue mass (17x12 cm); extensive osteolytic lesions of the left front
al and parietal bones, with intratumoral calcifications; contribution
of meningeal and scalp vessels. Surgery was performed to relieve progr
essive intracranial compression. According to the international workin
g formulation, it was classified as an intermediary malignant tumor. U
nfortunately, the patient died of a traffic accident, six weeks after
his discharge.