RT Journal A1 KEY L, MYERS MC, KROOVAND R, KELLY WS T1 PRiapism following testosterone therapy for delayed puberty JF American Journal of Diseases of Children JO American Journal of Diseases of Children YR 1989 FD September 1 VO 143 IS 9 SP 1001 OP 1002 DO 10.1001/archpedi.1989.02150210017011 UL http://dx.doi.org/10.1001/archpedi.1989.02150210017011 AB Sir.—The article by Kaplowitz1 in the January 1989 issue of AJDC again underscores the usefulness of testosterone as an agent for the diagnosis and treatment of delayed puberty. The safety of this therapy is implied in this and other articles discussing this treatment modality.13 There is a statement in Kaplowitz's article, similar to that in other articles written on this subject: "Although more frequent erections were noted, this was not felt to be excessive in any patient." While such a statement appears true for the majority, it is important to note that prolonged painful erections do occur on occasion during such testosterone therapy. We have recently observed three patients who developed prolonged erections during testosterone therapy, one resulting in clinical priapism.Patient Reports.—Patient 1.—A 14-year-7-month-old boy with Tanner stage I sexual development and a growth rate of 3.2 cm/y during the 18 months prior to