Neither seems right the way you have structured them (with the hyphens). Let's see your sentence.
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CliveYou probably understand this already, but . . . diseased means the disease exists.in your body.diagnosed means that a doctor has decided that you have it.In other words, eg you may have a disease that has not been diagnosed.As I said, no doubt you know this.CliveI'm not saying that these two compound adjectives are exact equivalents to each other in mea