Saw this in a tweet from @MRFCureOM: http://talkabouthealth.com/can-a-very-large-choroidal-tumor-truly-be-low-risk-if-shown-so-in-monosomy-3-test-result-i-thought-large-usually-meant-high-risk wherein Dr. William Harbour pretty much discounts the genetic test for monosomy 3 in favor of the Class1/2 Castle Biosciences gene expression test. He says, in part, "I do not trust the monosomy 3 test, so I cannot specifically comment on that aspect of the question. The monosomy 3 test is inferior to the Castle Biosciences test that gives a class 1 or class 2 result. All but 2-3 centers in the US are now using it."
I know the two tests were discussed in the June CURE OM web educational event but my question is, does anyone know what Dr Harbour is basing his opinion on? Is there some study that indicates one is a more effective predictor or metastatic OM or is this just a little salesmanship and a case of "not invented here?"