Pashtoon Kasi: Here’s a cool precision medicine story about Liquid Biopsies
Quoting Pashtoon Kasi, oncologist and researcher at Weill Cornell Medicine on X/Twitter:
“Here’s a cool precision medicine story about Liquid Biopsies. We did a webinar with the Cholangiocarcinoma Foundation. A patient’s family from Australia reached out inquiring if I could take a look at their tumour’s Next-generation sequencing (NGS) report. 70 gene testing only showed TP53. I call this a “bland” report.
A “bland” report that doesn’t have anything actionable, positive or negative, needs to be investigated further. A more comprehensive test with DNA and RNA is of value to make sure we aren’t missing any fusions. Important for cholangiocarcinoma – a target-rich disease.
Further tissue testing wasn’t feasible due to low cellularity of the tumor specimen. Opportunities for precision medicine are missed up to a third of the time if not more due to specimen issue, and/or delayed due to tissue not being readily available.
A couple months later I heard back from the family in who were able to send a liquid biopsy here to USA. Guess what we found! A RET Fusion. However, RET fusion inhibitors still not approved in Australia. Precision medicine isn’t complete without access to drugs.
By popular demand, here’s an update: Response to RET after just 2 weeks. From a CA19-9 of nearly 5000 down to ~1000. Not surprising when the driver is a fusion, the responses are brisk, robust, and durable. Remember this is 3rd line.”
Source: Pashtoon Kasi/Twitter
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