We read with interest the very relevant paper by Biagetti et al (2018), which reports some HFE mutations in idiopathic erythrocytosis, postulating that iron metabolism impairment is a possible underlying cause for erythrocytosis.We report here a similar study, but with a larger series of 132 patients with idiopathic erythrocytosis [115 males, 17 females (median age 52 years, range 17-79 years)] defined
Author contributionsFG and BB analysed the data and wrote the paper. FA, CG, SB, CB and VB performed the molecular analysis.