A case of hypertrophic osteoarthropathy in a 5-year-old Saudi boy is p
resented. The child developed painful joints, was found to have clubbi
ng of fingers and radiologically hypertrophic osteoarthropathy was dem
onstrated. The underlying cause of the condition was ingestion of anim
al fat in infancy, with a history of ghee oil aspiration which caused
a chronic lung inflammation, lipoid pneumonia, proven by lung biopsy.