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Re: Pet or Ct scan?
Hi Jackie, I sometimes have PET/CT scan but most times a CT - checking mostly on lung and liver mets status.
My understanding is that the CT is more accurate in viewing and measuring spots, whilst the PET will light up any actual active cancer. Bear in mind that other things may light up, but they can be spots that are showing just high levels of glucose.
As an example, late last year my TM's started to rise. My onc sent me to have a PET to see if my liver tumour was active, which it was, and had doubled in size - no new tumours. If only my liver had lit up, we were going to progress to having the tumour removed from the liver. However, one small lung spot also lit up, so my onc felt it was more important to re-start chemo. So this year I've only had CT scans to watch closely on the reduction of the liver tumour - the lung one never changes in size.
I may well re-investigate the liver resection later this year and I would imagine they would do a PET again. They will only consider removing the liver tumour when they are sure it is active cancer, but won't remove if it if there is other organ active cancer lighting up on the PET.
Hope this makes sense, and I'm sure others will probably have a more learned response!
Best wishes Marie
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dx Dec 2000 dcis 2.5cm clear sentinel node, ER/PR- Her-2+
lumpectomy, 6 cycles AC, 6 weeks rads
October 2007 three x 2.5cm lung mets. 8 months Taxol, started Herceptin and continue. Significant reduction in lung mets.
June 2011 3cm x 4cm liver tumour. Started Abraxane and continue with Herceptin.
November 2011. Finished with Abraxane, continue with just Herceptin. Liver tumour now reduced to 15mm x 12mm. Lung tumour now 10mm x 0.5mm
February 2012. Scans show everything stable, and brain scan clear.
July 2012. PET/CT scans show I'm in remission - no active cancer!
]Dec CT brain cllear, lungs stable, liver tumour has increased to 20mm. PET scans showed active liver met and active lung thinglet, and possible bone met.
Jan 2013 recommence Abraxane, continue with Herceptin.
June 2013 finish Cycle 6 Abraxane, continue with Herceptin. 30% reduction in liver tumour, everything stable.
December 2013. CA15-3 on rise.
February 2014. PET and CT scans show single liver tumour has increased to 35mm. No other activity.
March 2014. Planned for SBRT for liver met, but couldn't have treatment as tumour too close to bowel. Continue Herceptin.
April 2014. Surgeon advises that I am a good candidate for liver resection, so will have operation early May (after camping holiday). Tumour now 44mm x 29mm.
May 7, 2014. Two liver tumours surgically removed. Third of liver removed, and gall bladder. Am I NED?May 2014. Pathology of tumour shows it's now ER+ (95% staining).
June 2014. CA15-3 has decreased to 18 from a pre-surgery reading of 59!
June 2014. Started Femara, continue with Herceptin.
July 2014. Stop Femara due to severe Osteoporosis. Commence Tamoxifen, continue Herceptin. Waiting to hear if I can have Aclasta infusion.
August 2014. CA15-3 has decreased further to 12 - YAY!
October 2014. Aclasta infusion for Osteoporosis. November 2014, CA15-3 decreased to 11. Scans of liver all clear, something new showing up on lung, but just watching at the moment.
November 2015. Started SBRT on solitary lung met.
November 2015. Bone density scan showed very good improvement so back on Femara - yay!
December 2016. 6 treatments of SBRT radiation on lung. Seems to have had some effect.
June 2016. CA15-3 still stable and low at 9.
June 2016. Started subcutaneous Herceptin replacing infusion.
Jan 2017. LVEF dropped to 46%. Stopped Herceptin.
Feb 2017. Started ACE Inhibitor and BETA Blocker. Still off Herceptin.
Aug 2017. Two new mets - Portacaval lymph node and mediastinal lymph node.
Aug 2017. Blood tests show extremely elevated liver enzyme levels. Many tests to investigate.
Sept 2017. Portacaval lymph node blocking liver bile duct causing liver enzyme and Bilirubin problems.
Oct 2017. 8cm stent inserted into liver bile duct. Procedure caused pancreatitis, and hospitalised for 3 days. Liver enzymes improving rapidly.
Nov 2017. Commenced 4 weeks of radiation on Portacaval lymph node. 5 week break before chemo.
Jan 2018. CT scan. 11 new small liver mets, and new superclavical lymph node med.
Jan 2018. Start Kadcyla. CA15-3 426.
Apr 2018. First scans since starting Kadcyla. All tumours reducing. CA15-3 dropped to 30 from 426.
Dec 2019. Still on Kadcyla, but two small brain mets have been treated in the past month with SRS. CA15-3 stable for 12 months at 11.
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