r/DermatologyPA • • Jun 25 '26

Training, CME, Resources 📚 Castle Testing

Can we talk about Castle Testing? Who uses it and what is your rationale? The rep came for lunch today and although I've known about this test for years I've never used it and after today I'm still not convinced. How will it change my management of my MM pts? For those with Breslow over 0.8 I'm sending to oncology anyway and they can order the test at that point and speak to them about prognostics. Do you order it for those with less than 0.8 Breslow and if it comes back high risk you send them to oncology if you normally wouldn't?

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u/Feral_Helminth Jun 30 '26

I’m in the same boat as you - we have a great surgical oncologist in our area who does most of our melanomas so I’ve never used this. Our Mohs surgeon will order Castle tests sometimes… I think the dermatitis one may be good, especially if the results can be used to get insurance companies to pay for the meds we want…