Commonly it is the left supraclav nodes that are from colon cancer as those nodes are connected to the abdomen. It can show up on the right but this is less common. That combined with the recent PET scan would mean you have a good chance of it not being cancer. However only a biopsy will tell you.
40 yo Male. BC Canada Sigmoid Colectomy Dec. 2016
Pathology T3N2bM1 19 of 24 Nodes Positive + tumour deposits
PET scan - Para-Aortic and Iliac Lymph node spread. Stage VI.
Moderately differentiated. MSS. KRAS/BRAF Wild.
Mutations: TP53, ERBB4, MLL3, PDCD1LG2, PRKDC, SMAD3
FOLFOX Commenced Jan 9/2017 - Avastin(Bev) added after round 1.
June 2017 Dose Reduction on Round 11 due to Neuropathy.