PMC4882965_01
Right medium-sized (29 mm) vestibular schwannoma in 2007 (a) remaining stable in size in 2009 (b) and then showing a progressive reduction in the maximum intracranial diameter with conspicuous reduction in the degree of central tumor enhancement (c and d). Maximum intracranial diameter of 22 mm at most recent follow-up (e)
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F1
MRI in 2007 disclosed a lesion in the right cerebellopontine angle (CPA) of maximum intracranial diameter (ICD) of 29 mm in continuity with the acoustic nerve, with associated secondary hydrocephalus [Figure 1a]. The tumor remained stable in ICD for 2 years with a maximum ICD of 29 mm [Figure 1b]. MRI at 4 years revealed a slight reduction in the lesion with an ICD of 26 mm [Figure 1c]. Further MRI performed at years 6 and 7 showed progressive reduction in the degree of central tumor enhancement and a reduction in the maximum ICD of, respectively, 24 and 22 mm [Figure 1d and e].
PMC4882965_02
Right medium-sized (25 mm) vestibular schwannoma in 2009 (a) remaining stable in size in 2012 (b) and then showing a progressive reduction in size in 2013 (c) to a maximum intracranial diameter of 20 mm (d) at recent follow-up
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F2
A CT scan demonstrated the presence of a right VS with an extrameatal component in the CPA of maximum ICD of 25 mm [Figure 2a]. A further MRI at 3 years showed the tumor maximum ICD of 25 mm [Figure 2b], and in 2013 the tumor maximum ICD was 24 mm [Figure 2c]. The most recent MRI investigation at 5 years showed a further reduction in the maximum ICD to 20 mm [Figure 2d].