ZMPSTE24 and Hutchinson-Gilford progeria syndrome: Four patients with definite HGPS and eight patients with progerin-related PL (definite HGPS, n = 4; uncertain HGPS, n = 2; ZMPSTE24 deficiency, n = 2) were reported alive on October 2023, and the prevalence of HGPS was estimated to be 1 in 15.5 to 31.1 million.