title: Administration of nonsteroidal anti-inflammatory drugs accelerates spontaneous healing of osteoid osteoma.
abstract: BACKGROUND
  It has been reported that osteoid osteoma may heal spontaneously.
  
  
  METHODS
  To elucidate the efficacy of conservative treatment with nonsteroidal anti-inflammatory drugs (NSAIDs) for osteoid osteoma, clinical courses of the 15 patients with osteoid osteoma conservatively treated with NSAIDs were observed. Twelve out of the 15 patients took a usual dose of NSAIDs regularly (regular group).
  
  
  RESULTS
  Except for one patient, all the patients of the regular group maintained pain-free state. Eight out of the 12 patients of the regular group were free of pain even after discontinuing NSAIDs in the average of 18.3 months (range 2-36 months). Because one patient of the regular group required twice the usual dose to maintain pain-free state, we performed surgical excision. The remaining three patients of the regular group were asymptomatic and still taking NSAIDs. The healing rate of the osteoid osteoma with regular dose of NSAIDs was 8/12 (67%) at the time of this study, which may be improved up to 11/12 (92%). On the other hand, mean period of time until spontaneous diminution of pain in the 14 patients conservatively observed without NSAIDs so far reported in the literature was 75 months (range 24-180 months).
  
  
  CONCLUSIONS
  Thus, osteoid osteoma is highly likely to heal spontaneously and administration of NSAIDs accelerates spontaneous healing. Therefore, conservative treatment with NSAIDs can be an important option other than surgical excision in treating osteoid osteoma.
authors.affiliation: Department of Orthopaedic Surgery and Musculoskeletal Oncology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, 3-18-22 Hon-Komagome, Bunkyo-ku, Tokyo 113-8677, Japan. goto-tky@cick.jp
authors.forename: Takahiro
authors.initials: T
authors.lastname: Goto
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Shinoda
authors.forename: Tomotake
authors.initials: T
authors.lastname: Okuma
authors.forename: Koichi
authors.initials: K
authors.lastname: Ogura
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Tsuda
authors.forename: Kiyofumi
authors.initials: K
authors.lastname: Yamakawa
authors.forename: Takahiro
authors.initials: T
authors.lastname: Hozumi
mesh_terms: D000293:Adolescent; D000328:Adult; D001859:Bone Neoplasms / Q000188:drug therapy* / Q000473:pathology; D002574:Cervical Vertebrae; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010017:Osteoma, Osteoid / Q000188:drug therapy* / Q000473:pathology; D012598:Sclerosis; D013125:Spinal Neoplasms / Q000188:drug therapy / Q000473:pathology; D055815:Young Adult