Q-6. A patient presented with a 4 cm tumour in the left parietal lobe for which he underwent surgery and radiotherapy. After 2 months, he presented with headache and vomiting. Which of the following would best characterize the lesion in this patient? (A112)
a) Gd-enhanced MRI
b) 99T-HMPAO SPECT brain
c) Digital subtraction angiography with dual source CT scan
d) 18-FDG PET scan
Answer: 18-FDG PET scan
Positron emission tomography (PET) can be used to detect distance metastasis, tumor recurrence after surgery or radio-therapy, treatment response and staging of various tumors.
It is also helpful in pre-operative localization of temporal lobe lesion in refractory epilepsy.