title: [A 34-year-old man with hemorrhagic cystitis].
abstract: BACKGROUND
  A 34-year-old male presented with macroscopic haematuria, abdominal pain and dysuria while being treated with penicillin for bacterial endocarditis. All blood cultures yielded Streptococcus mutans. After four weeks of treatment he developed haemorrhagic cystitis, thrombophlebitis and eosinophilia. The symptoms disappeared when he was taken off penicillin. After change of medication to ceftriaxone, the patient developed reversible neutropenia and recovered completely.
  
  
  CONCLUSIONS
  Haemorrhagic cystitis caused by penicillin can be potentially fatal; two cases have earlier been described. Because of cross reaction this patient also developed reversible neutropenia. It is well known that beta-lactam antibiotics can induce severe neutropenia.
authors.affiliation: Medisinsk avdeling, Sentralsjukehuset i Rogaland, Postboks 8100, 4068 Stavanger. antb@sir.no
authors.forename: Trygve
authors.initials: T
authors.lastname: Brügger-Andersen
authors.forename: Rolf
authors.initials: R
authors.lastname: Reiersen
mesh_terms: D000328:Adult; D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000009:adverse effects*; D003556:Cystitis / Q000139:chemically induced*; D004697:Endocarditis, Bacterial / Q000188:drug therapy* / Q000382:microbiology; D004802:Eosinophilia / Q000139:chemically induced; D006470:Hemorrhage / Q000139:chemically induced*; D006801:Humans; D008297:Male; D010400:Penicillin G / Q000008:administration & dosage / Q000009:adverse effects*; D013290:Streptococcal Infections / Q000188:drug therapy* / Q000382:microbiology; D013295:Streptococcus mutans / Q000302:isolation & purification; D013924:Thrombophlebitis / Q000139:chemically induced
chemical_list: D000900:Anti-Bacterial Agents; D010400:Penicillin G