[Clinical characteristics of 6 children with idiopathic interstitial pneumonia]

Area of Science:

• Pediatric Pulmonology
• Respiratory Medicine
• Pediatric Critical Care

Background:

• Idiopathic interstitial pneumonia (IIP) is a rare group of lung diseases in children.
• Understanding the clinical spectrum and outcomes of pediatric IIP is crucial for effective management.
• Limited data exists on the specific characteristics and prognosis of IIP subtypes in pediatric populations.

Purpose of the Study:

• To delineate the clinical features, diagnostic findings, and treatment outcomes of pediatric IIP.
• To identify common subtypes of IIP in children.
• To evaluate the long-term prognosis of children diagnosed with IIP.

Main Methods:

• Retrospective analysis of 6 pediatric patients with IIP hospitalized between January 2015 and March 2020.
• Review of clinical manifestations, high-resolution computed tomography (HRCT) findings, pulmonary function tests, and lung biopsy results.
• Assessment of treatment responses, primarily to systemic glucocorticoids, and long-term follow-up data.

Main Results:

• The study included 6 children (2 males, 4 females) aged 4.8–10.6 years with subacute onset, presenting with cough, dyspnea, and cyanosis.
• HRCT revealed diffuse bilateral lung abnormalities; pulmonary function tests indicated moderate to severe mixed defects in most patients.
• Four patients were diagnosed with cryptogenic organizing pneumonia (COP) showing HRCT resolution, while two with nonspecific interstitial pneumonia (NSIP) had residual fibrosis; all patients responded well to glucocorticoids with no recurrence during follow-up.

Conclusions:

• Pediatric IIP is characterized by subacute onset, respiratory symptoms, and characteristic HRCT findings.
• Cryptogenic organizing pneumonia (COP) and nonspecific interstitial pneumonia (NSIP) are common subtypes in children.
• Systemic glucocorticoid therapy demonstrates efficacy in treating pediatric IIP, associated with an overall favorable prognosis.