title: Priapism as a possible acute side effect of radical radiotherapy for prostate cancer.
abstract: We report a case of a 73 year-old male diagnosed with T1 N0 M0 prostate cancer, Gleason score 7, undergoing a course of radical radiotherapy using 7600 cGY delivered in 38 fractions. Several hours after receiving his 27th fraction, he reported experiencing a painful penile erection lasting more than 6 hours. A history and several investigations were conducted to determine the etiology of this adverse event. Although several possible etiologies were considered, the two most likely possibilities were direct prostate-irradiation and/or his use of alfuzosin, a novel alpha 1-adrenergic antagonist. A literature search revealed one case of priapism secondary to radiotherapy as well as reports of priapism associated with drugs similar to alfuzosin.
authors.affiliation: Medical Student, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Lomaga
authors.forename: Charles
authors.initials: C
authors.lastname: Hayter
mesh_terms: D000317:Adrenergic alpha-Antagonists / Q000009:adverse effects; D000368:Aged; D006801:Humans; D008297:Male; D011317:Priapism / Q000209:etiology*; D011467:Prostate / Q000528:radiation effects; D011471:Prostatic Neoplasms / Q000532:radiotherapy*; D011799:Quinazolines / Q000009:adverse effects; D011878:Radiotherapy / Q000009:adverse effects; D011879:Radiotherapy Dosage
chemical_list: D000317:Adrenergic alpha-Antagonists; D011799:Quinazolines; C047638:alfuzosin