Gold standard investigation for recurrent gastrointestinal stromal tumor is: (A) MRI, (B) MIBG, (C) USG, (D) PET CT
Answer is D. .Investigation: - Mainly CT scan - Tumour / molecular marker to differentiate it from sarcomas (immunohistochemistry). - Endosonography guided biopsy/guided FNAC are impoant to get histological confirmation. - 18 FDG PET scan is very useful adjunct to CT but reserved for difficult/equivocal cases. ref:SRB&;S manual of surgery,ed 3,pg no 792