Answer of November 1999

Clinical History:

M/60 Bilateral lower limbs weakness

Figure 1 NECT brain
Figure 2 NECT brain
Figure 3 CECT brain

What is your diagnosis?

                           Figure 1

                           Figure 2

                           Figure 3

                           Figure 4

Diagnosis:

Primary cerebral lymphoma

Discussion:

Figure 1 NECT brain shows a hyperdense mass in the corpus callosum and adjacent peritumour oedema.

Figure 2 NECT brain shows the mass to be seperated from the falx.

Figure 3 CECT brain demontrates the strong and homogenous contrast enhancement of the mass.

Figure 4 Coronal reformat image of the brain clearly shows the mass to be in the corpus callosum. Biopsy revealed lymphoma of brain.