Close
  Indian J Med Microbiol
 

Figure 5: A 53-year-old patient initially presented with pain in abdomen and underwent anal polypectomy. Biopsy report revealed anorectal melanoma with immunohistochemistry results positive for HMB 45 and S100 protein. Follow-up USG done revealed left liver lobe hypoechoic suspicious lesion. USG done six months later showed increase in the size of suspicious left liver lobe lesion. FNAC revealed metastatic malignant melanoma consistent with known primary in the anorectum. FDG PET/CT done for restaging showed no abnormal focus of increased tracer uptake in the scan as seen in MIP (a) and fused transaxial images (b and c); triphasic diagnostic CT scan done a week after shows subcentimeter size enhancing liver lesions in segment VIII and III (d and e), best appreciated in portovenous phase. Thus, PET/CT did not detect the subcentimeter size metastatic liver lesions. FDG: Fluorodeoxyglucose; PET/CT: Positron emission tomography/computed tomography; USG: Ultrasonography; FNAC: Fine-needle aspiration cytology

Figure 5:  A 53-year-old patient initially presented with pain in abdomen and underwent anal polypectomy. Biopsy report revealed anorectal melanoma with immunohistochemistry results positive for HMB 45 and S100 protein. Follow-up USG done revealed left liver lobe hypoechoic suspicious lesion. USG done six months later showed increase in the size of suspicious left liver lobe lesion. FNAC revealed metastatic malignant melanoma consistent with known primary in the anorectum. FDG PET/CT done for restaging showed no abnormal focus of increased tracer uptake in the scan as seen in MIP (a) and fused transaxial images (b and c); triphasic diagnostic CT scan done a week after shows subcentimeter size enhancing liver lesions in segment VIII and III (d and e), best appreciated in portovenous phase. Thus, PET/CT did not detect the subcentimeter size metastatic liver lesions. FDG: Fluorodeoxyglucose; PET/CT: Positron emission tomography/computed tomography; USG: Ultrasonography; FNAC: Fine-needle aspiration cytology