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World J Radiol. May 28, 2014; 6(5): 177-191
Published online May 28, 2014. doi: 10.4329/wjr.v6.i5.177
Figure 21
Figure 21 Metachronous second primary tumor. A T1N0M0 left floor of mouth squamous cell carcinoma (SCC) (not shown) s/p wide local excision with primary closure and selective neck dissection 3 yr ago. Surveilance positron emission tomography/computed tomography (A-C) showed a recurent SCC at left floor of mouth (yellow arrow) and two metachronous second primaries at the left hypopharyngx (black arrow) and left base of tongue (red arrow).