AJNR -- Mukherji and Bradford 27 (2): 243 Figure 2

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Fig 2. Unknown primary detected with PET-CT.

A, Axial PET demonstrates and enlarged left-sided lymph node with avid FDG uptake. Biopsy revealed squamous cell carcinoma but there was no mass seen at endoscopy.

B, Contrast-enhanced CT shows no evidence of an aggressive focal mass.

C, PET-CT demonstrates abnormal focal uptake in the left tonsil. The patient underwent a left tonsillectomy and the pathology revealed squamous cell carcinoma.