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According to this https://www.sciencedirect.com/science/article/abs/pii/S0190962213010554, and this, https://onlinelibrary.wiley.com/doi/full/10.1111/bjd.14499, sensitivity and specificity for BCC as a whole is pretty good. Predictive values for the different types of BCC is pretty good in some variants but not so much in others.


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Kassi et al. (2012) does state that there is low yield in some cases as you pointed out in your quote and was highlighted in the Reddit cross-post. Again, pointed out in Reddit, you are sucking up individual cells and not taking a piece of tissue and therefore it can have an incredibly low yield and sometimes produce false negative results. With the figures ...


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