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. 2021 Aug 13;13(8):e17143. doi: 10.7759/cureus.17143

Figure 2. MRI of the brain one day and four weeks post craniotomy.

Figure 2

(A-D) MRI [(A): T1 (longitudinal relaxation time) without contrast, (B): T2 (transverse relaxation time), C: Fluid-attenuated inversion recovery (FLAIR), and D: Susceptibility-weighted angiography (SWAN)] of the brain post craniotomy with EVD. Postsurgical changes of right suboccipital craniotomy and resection of the right cerebellar tumor. Blood present within the resection cavity and at the periphery limited evaluation for enhancement. However, there was no evidence of intra- or perilesional enhancement to suggest residual disease.

(E) MRI of the brain with contrast four weeks post craniotomy. A mixed solid and cystic mass in the right cerebellar hemisphere with a heterogeneous enhancement of the solid component that measures approximately 63 x 52 x 34 mm engulfing the prior resection cavity. The lesion extends to the left cerebellar hemisphere and causes a mass effect on the right side of the brainstem, and results in effacement of the fourth ventricle. The mild dilatation of the lateral and third ventricles is suggestive of developing hydrocephalus.