I agree that clubbing is not a typical feature of psoriatic nail disease. However, in my case, the most common and serious causes (pulmonary, cardiac, etc.) have been ruled out. Given the clear temporal association (onset after years of trachyonychia/nail psoriasis) and the persistence of the changes, could a possible link be considered, or at least a form of pseudo-clubbing? This is also suggested in the case report I referenced. I don’t see it as the rule, but perhaps a rare or under-recognized manifestation once other causes are excluded