Osteomyelitis Caused by Bacillus Calmette-Guérin Vaccination in a Healthy Toddler.

Bacillus Calmette-Guerin (BCG) osteomyelitis in immunocompetent children is a rare complication of BCG immunization which presents with nonspecific findings and often leads to delayed diagnosis. We report a 1-year and 10-month-old male infant with complaining of knee pain and limping for 5months. He received surgical debridement due to suspicion of malignancy but BCG osteomyelitis of the distal femur was diagnosed with the culture of the specimens which revealed to have Mycobacterium bovis-BCG strain. He was successfully treated with antituberculous therapy lasting for 1 year.