Intralesional cidofovir for the treatment of severe juvenile recurrent respiratory papillomatosis: long-term results in 4 children.
OBJECTIVE
We sought to determine the efficacy of intralesional injection of cidofovir in improving resolution of recurrent respiratory papillomatosis (RRP). Study design and setting We conducted a prospective, observational trial at an academic tertiary children's hospital.


RESULTS
Four children with RRP requiring more than 6 surgical excisions per year were treated with intralesional cidofovir. Cidofovir (5 mg/mL) was injected into airway sites where papillomas had just been excised using sharp technique. Each patient had 6 treatments performed 6 to 8 weeks apart. Biopsies confirmed benign papilloma lesions in all cases. During treatment with intralesional cidofovir there was diminished growth of the papillomas in each patient. Once cidofovir treatment was stopped, the rate of regrowth and frequency of surgical excision returned to pretreatment levels in 3 of the 4 patients.


CONCLUSIONS
Intralesional cidofovir may provide benefit in reducing the rate of RRP growth while under treatment, but RRP severity returned to pretreatment levels once cidofovir treatment was stopped using this treatment program.
Milczuk
Henry A
HA
Department of Otolaryngology-Head and Neck Surgery, Oregon Health and Science University, Portland, OR 97239-3096, USA. milczukh@ohsu.edu
D000998:Antiviral Agents / Q000008:administration & dosage*; D002648:Child; D002675:Child, Preschool; D000077404:Cidofovir; D003596:Cytosine / Q000008:administration & dosage* / Q000031:analogs & derivatives*; D005260:Female; D006801:Humans; D007223:Infant; D015552:Injections, Intralesional; D007822:Laryngeal Neoplasms / Q000188:drug therapy*; D008297:Male; D063065:Organophosphonates; D009943:Organophosphorus Compounds / Q000008:administration & dosage*; D010212:Papilloma / Q000188:drug therapy*; D027383:Papillomaviridae; D030361:Papillomavirus Infections / Q000188:drug therapy*; D011446:Prospective Studies; D012008:Recurrence; D014412:Tumor Virus Infections / Q000188:drug therapy*
D000998:Antiviral Agents; D063065:Organophosphonates; D009943:Organophosphorus Compounds; D003596:Cytosine; D000077404:Cidofovir