Background: Hidradenitis suppurativa is uncommon in patients of pediatric age, and differentiation with adult-onset disease is controversial. Treatment of pediatric hidradenitis suppurativa is scarcely standardized, and specific guidelines are lacking.
Objective: We report the clinical features, relevant risk-factors, comorbidity profile, and treatment patterns of a hospital-based cohort of pediatric hidradenitis suppurativa.
Methods: In a cross-sectional study data on patients' demographics, disease-specific characteristics, early/pre-pubertal onset of disease, comorbidities, and treatment management were retrieved. Reference population data and clinical data from the national hidradenitis suppurativa disease registry were used for comparison.
Results: From a database of 870 patients with hidradenitis, 71 (15 males and 56 females) patients aged <18 years (mean age: 15.3 years; range 8-17 years), with mild (Hurley I, 45.1%) and moderate-severe disease (Hurley II-III, 54.9%), were retrieved. Smoking (23.9%) and overweight/obese frequencies (59.2%) were higher than reference population standards. Patient's older age at baseline (OR 1.43, 95% CI: 1.01 to 2.02) and higher BMI (OR 1.26, 95% CI: 1.07-1.48) were the only factors associated with moderate-severe disease. Family history and early/pre-pubertal onset of disease were not associated with severity or extent of disease. Sebaceous-follicular comorbid conditions were associated with cigarette smoking (P = .002). Among 81 treatment courses, clindamycin-based and zinc-sulphate-based combination regimens were most frequently used (59.3%). Female preponderance, family history of disease and extensive involvement were significantly different from the general hidradenitis suppurativa population.
Conclusions: Pediatric hidradenitis suppurativa presents a clinical spectrum comparable to adult-onset disease. Increased preventive measures should target obesity and smoking in this population.
Keywords: acne inversa; adolescent; children; hidradenitis suppurativa; pediatric population.