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Metastatic primary anorectal melanoma developing in a patient treated for multicentric glioblastoma multiforme: two rare malignancies presenting in synchronicity
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  1. Irfan Ahmad1,
  2. Irfan Bashir1,
  3. Neeraj Dhingra1,
  4. Vijay Hangloo2
  1. 1Radiation Oncology, Batra Hospital and Medical Research Centre, New Delhi, Delhi, India
  2. 2General Surgery, Batra Hospital and Medical Research Centre, New Delhi, Delhi, India
  1. Correspondence to Dr Irfan Ahmad, irfan.a{at}icloud.com

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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 right middle cerebellar peduncle (blue arrow). (C, D) T2-weighted axial image reveals the heterogeneously hyperintense nature of the lesions involving the right thalamus (yellow arrow) and right middle cerebellar peduncle (green arrow). Note the relative lack of extensive perilesional oedema. (E, F) T2-weighted sagittal and coronal images demonstrate the discontinuity of both lesions, the right thalamic lesion located supratentorially (yellow arrow) and the right middle cerebellar peduncle …

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