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Τετάρτη 21 Μαρτίου 2018

Metastatic primary anorectal melanoma developing in a patient treated for multicentric glioblastoma multiforme: two rare malignancies presenting in synchronicity

Description

A 66-year-old woman presented with complaints of dizziness, headache and forgetfulness, which had been worsening over the last 2 months. General physical examination revealed weakness in the left upper and lower limbs (power 4/5) with spasticity (deep tendon reflexes 3+ on left side). A non-contrast MRI brain revealed a mass lesion involving the right thalamus and another lesion in the right cerebellar peduncle. Both lesions were hyperintense on T2 and hypointense on T1 sequences (figure 1). A stereotactic biopsy from the thalamic lesion revealed glioblastoma multiforme (WHO Grade IV) on histopathological evaluation and immunohistochemistry (Ki67 index: 15%–20%). Due to financial constraints, O(6)-methylguanine-DNA methyltransferase(MGMT) promoter methylation status was not determined.

Figure 1

Pretreatment non-contrast MRI images of multicentric glioma. (A) T1-weighted axial image reveals a hypointense space-occupying lesion in the right thalamus involving the right basal ganglia (red arrow). (B) T1-weighted axial image reveals a hypointense space-occupying lesion in the...



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