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Systemic Bevacizumab for Recurrent Respiratory Papillomatosis: Comparison
Please note this is a comparison between Version 1 by Maria Angelica Guerra and Version 2 by Jason Zhu.

Respiratory recurrent papillomatosis (RRP) is a fatal disease with no known cure. In severe RRP cases, systemic bevacizumab (SB) could be used as adjuvant therapy. SB may be a promissory treatment and control option for RRP. More research is needed to evaluate the efficiency and adverse effects in various populations.

  • adjuvant therapy child
  • adult
  • adult-onset recurrent respiratory papillomatosis juvenile-onset papillomatosis

1. Introduction

Recurrent respiratory papillomatosis (RRP) and recurrent cutaneous papillomatosis (RCP) are devastating diseases with a high risk of long-term complications that impact patients’ and their families’ quality of life. The juvenile-onset RRP (JO-RRP) incidence rate is 4.3 per 100,000, whereas the adult-onset RRP (AO-RRP) incidence rate is 1.8 per 100,000 [1]. The two types of human papillomavirus (HPV) that cause RRP and RCP are HPV 6 and HPV 11. RRP and RCP are distinguished by the recurring growth of papillomas in the respiratory and gastrointestinal tracts, which can obstruct them in severe cases. There is no treatment for systemic papillomatosis [2].
Extra laryngeal papillomatosis has been seen in up to 30% of cases, with the oral cavity, trachea, and bronchi being the most common sites [3][4][3,4]. These patients have recurrent bronchiectasis, pneumonia, and decreased lung function [3][4][3,4].

2. Systemic Bevacizumab Studies

Table 1 summarizes the clinical characteristics of patients with RRP before SB treatment. The studies included were published between 2009 and 2021. A total of 34 patients were described in these studies from the United States (three case reports; n = 3, four case series; n = 12), India (one case report; n = 1), Germany (one case report; n = 1, one case series; n = 5), Colombia (one case series; n = 3), Argentina (one case report; n = 1), Chile (one case report; n = 1), and Spain (one case series; n = 2). In total, In total, 17 and 34 patients were under 18 years old and were adults, respectively. The median age for those under 18 years old was 8 yr (min = 0.58 and max = 16), and the median for adults was 34 years (min = 18 and max = 87). There were 23 males (67.6%).
Table 1. Clinical characteristics of patients with RRP prior systemic bevacizumab treatment. CR, Complete Regression, PR, Partial Regression, VGPR, very good partial remission, NA Not Applicable.
Study Author Country Year Age at Treatment Start Gender Age at Onset Larynx Trachea Lung Number of Surgical Interventions Needed Surgical Intervals Prior Therapy
summarizes SB treatment, dosage, and outcomes in patients with RRP. Various doses were reported at various schemes. The most commonly reported SB dose was 10 mg/kg, which was received by 25 (73.5%) patients. The initial dose intervals with this dose ranged from 2 to 5 weeks. Two patients received 5 mg/kg with a 2-week interval between doses, and one received the same dose but with a 3-week interval. Two patients were given 15 mg/kg at 3-week intervals. The authors reported an initial dose of 5 mg/kg in four patients, followed by one increase to 7.5 mg/kg and two increases to 10 mg/kg.
Twenty-six of the 34 patients had laryngeal lesions, 19 had tracheal lesions, and 17 had lung lesions. Twelve patients had tracheal, laryngeal, and lung lesions. Before bevacizumab therapy, 24 of the 34 patients had undergone surgical procedures. The reported interventions had a median of 13 interventions (min = 3 interventions and max = 500 interventions). Table 2
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