von Hippel Lindau disease - multiple haemangioblastomas

Case contributed by Royal Melbourne Hospital

Presentation

Headaches

Patient Data

Age: 30 years
Gender: Male

At least five heterogeneous but predominantly T2 hyperintense and enhancing intra-axial lesions are present within the posterior fossa, the largest within the left inferior cerebellar hemisphere measuring 2.7 x 2.5 cm in transaxial diameter. 2 further punctate foci of enhancement in the right cerebellar hemisphere are suspicious for additional tiny lesions. 

Most of these abut the pial surface and have enlarged supplying and draining vessels adjacent. Oedema and positive mass effect  associated with the largest lesion, resulting in the distortion of the inferior mid brain, pons and fourth ventricle. Up to 13mm inferior tonsillar herniation. Moderated hydrocephalus with minor periventricular T2 hyperintensity. No further supratentorial abnormality, in particular no other intra-axial mass nor abnormal areas of enhancement.

The larger and more anterior left cerebellar hemisphere lesion is markedly hypervascular, with supply from enlarged left anterior inferior cerebellar arteries, as well as posterior inferior cerebellar arteries. No
significant meningeal supply. Other smaller lesions are identified, the larger superior to the 25mm lesion, and better characterised on MRI. No supply from external carotid branches.

Pathology

Histology

The sections show replacement of cerebellar parenchyma by a moderately hypercellular, intensely vascular tumour.  Vascular channels vary from large calibre thin-walled sinusoids to small capillaries.  These are lined by unremarkable endothelial cells.

Intervening tumour is composed of lobules and diffuse sheets of stromal cells with round and oval vesicular nuclei and a variable amount of pale and granular cytoplasm.  No mitotic figures are identified and there is no vascular endothelial cell hyperplasia and no necrosis.  The features are of a capillary haemangioblastoma.

DIAGNOSIS: Posterior fossa capillary haemangioblastoma (WHO Grade I)

Case Discussion

This case illustrates multiple posterior fossa haemangioblastomas, in a patient with confirmed von Hippel Lindau disease.

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Case information

rID: 15908
Case created: 21st Nov 2011
Last edited: 14th Jan 2017
Inclusion in quiz mode: Included

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