Siblings' Risk of Adenoid Hypertrophy: A Cohort Study in Children

Area of Science:

• Otolaryngology
• Genetics
• Pediatrics

Background:

• Adenoid hypertrophy (AH) is a common condition in children, potentially leading to various symptoms.
• Understanding familial predispositions to AH can aid in early diagnosis and management.
• Previous studies suggest a potential genetic component in adenoid size and hypertrophy.

Purpose of the Study:

• To compare adenoid size in preschool-age siblings at the same chronological age.
• To analyze the occurrence of adenoid symptoms in siblings.
• To establish a correlation between adenoid hypertrophy and adenoid symptoms within sibling pairs.

Main Methods:

• Flexible nasopharyngoscopy examination (FNE) was used to assess adenoid size.
• 49 pairs of siblings were analyzed, focusing on symptoms and FNE results at the same age.
• Statistical analysis included correlation coefficients (r) and odds ratios (OR) with confidence intervals (CI).

Main Results:

• A significant familial correlation in adenoid size was observed between siblings at similar ages (r = 0.673, p < 0.001).
• Siblings of children with Grade III adenoid hypertrophy (A/C ratio > 65%) had a 26-fold increased risk of developing Grade III AH (OR = 26.30).
• Children who snore and have an older sibling with Grade III AH showed a 46-fold higher risk of developing Grade III AH (OR = 46.67, p < 0.001).

Conclusions:

• A significant familial correlation exists for adenoid size in siblings examined at the same age.
• Overgrown adenoids (Grade III AH) in an older sibling strongly predict similar outcomes in younger siblings presenting with symptoms.
• Snoring in a younger sibling, coupled with Grade III AH in an older sibling, indicates a high probability of developing significant adenoid hypertrophy.