At diagnosis, both groups had similar levels of eGFR (59.4 ± 18.2 vs. 57.2 ± 34.5 mL/min) and NT-proBNP [median (IQR) 1806 (967–3104) vs. 1678 (979–4226) pg/mL], and ATTR-CM disease stage was comparable between groups (p = 0.92). The gene discussed is NPPB; the disease is cutaneous mastocytosis.