title: Myositis complicating benzathine penicillin-G injection in a case of rheumatic heart disease.
abstract: A 7-year old boy developed myositis secondary to intramuscular injection of benzathine penicillin-G in the context of secondary prophylaxis for rheumatic heart disease. Side effects of intramuscular delivery of benzathine penicillin-G are well described and include injection site pain and inflammation, but myositis, as depicted on magnetic resonance imaging in this case, has not previously been described.
authors.affiliation: Department of Paediatrics, Royal Darwin Hospital, Darwin, NT, Australia; Northern Territory Medical Program, Flinders University, Darwin, NT, Australia; Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia.
authors.forename: Joshua R
authors.initials: JR
authors.lastname: Francis
authors.affiliation: Telethon Kids Institute, University of Western Australia, Perth, WA, Australia.
authors.forename: Rosemary
authors.initials: R
authors.lastname: Wyber
authors.affiliation: Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia.
authors.forename: Bo
authors.initials: B
authors.lastname: Remenyi
authors.affiliation: Department of Radiology, Royal Darwin Hospital, Darwin, NT, Australia.
authors.forename: David
authors.initials: D
authors.lastname: Croser
authors.affiliation: Telethon Kids Institute, University of Western Australia, Perth, WA, Australia; Department of Paediatric Infectious Diseases, Princess Margaret Hospital for Children, Perth, WA, Australia.
authors.forename: Jonathan
authors.initials: J
authors.lastname: Carapetis
keywords: Acute rheumatic fever; Adverse drug reaction; Penicillin; Rheumatic heart disease