A questionnaire study of 42 Saudi patients with sickle cell anemia revealed that none of them had ever suffered from priapism. A comparison of hematological parameters between Jamaican priapism patients and Saudi non-priapism patients suggested that high Hb F levels and hypochromic microcytosis in Saudi patients might play an important role in preventing this complication.
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Al-Awamy et al. (2009) studied this question.