Sitting in the chemo chair getting GAC #30 as I type. Just got my CA19-9 result a few minutes ago. All the data I have from one lab is in the attached graph.

Data in short:
-- GAC worked better for me than Folfirinox.
-- Reducing Abraxane aligned with increasing CA19-9.
-- Missing a treatment aligned with increasing CA19-9.
-- Restoring full Abraxane aligned with two small decreases in CA19-9.
-- Reductions of CA19-9 after missed Tx (131 -> 129 -> 122) not as sharp as last time at similar levels (158-> 105).
-- Upward slope after missed Tx not quite as steep as slope between recurrence suspected & confirmed.
-- CA19-9 will rise and tumors will grow quickly when off treatment.
---- Warrants consideration if washout period is required before a clinical trial.

Perception:
The slower response to full doses after missed Tx _seems_ to suggest some resistance is developing, or at least less control with current dose. Aligns w/ tumor growth shown on recent scans after the missed Tx.

Click on graph to enlarge.