Abstract

Case 1: A 79 year old woman with a history of hypertension presents with a one week history of extremity weakness, progressive gait instability, urinary incontinence, headache, and disorientation. Neuroimaging reveals a hemorrhagic lesion centred on the septum pellucidum and splenium of the corpus callosum.
Case 2: A 36 year old healthy woman presented with “clumsiness” of her right hand and was found to have a heterogeneously-enhancing posterior fossa lesion, thought to be a meningioma with atypical imaging features. Her clinical symptoms spontaneously resolved but the lesion increased in size from 10 x 8 x 8 mm to 19 x 18 x 17 mm over an eight-year period. The patient opted to undergo resection of the slowly growing lesion.

What is/are?

1 : What is the (shared) diagnosis of these two cases?
2 : What type of pathophysiologic process is occurring in these lesions?