“…AC has classically been described in young adolescent girls from tropical and subtropical countries, although adult cases have been reported from temperate zones as well [9,12,[26][27][28]. However, because this condition has also affected men, premenopausal women, and children, there seems to be little support for these theories [7,9,29]. Results from our study with large number of patients indicated that most of the ACs in the Chinese population occur in male adults, which is in contrast to some of the the data reported by others [9,12,30,31].…”