“…Over 70 years, PP was dominant; sex-ratio tended to equilibrate similarly to what was reported in France. 3 However, PF incidence is remarkably high in the elderly (50%) compared to studies performed in central Tunisia (21%) 4 or France (28%). 3 In France, PV is dominant in young patients 5 as well as the elderly, 3 whereas in south Tunisia, PF is endemic in young patients 1 and remains frequent in the elderly.…”