Although trigger finger is common, pediatric trigger thumb is uncommon. In trigger thumb the finger is held in flexed position. The etiology of trigger finger is unknown and can occur isolated without any relation to other syndromes, however there are some evidences that suggest genetic etiology. We reported 2.5 year old twins both having bilateral trigger thumb. Grandfather of the twins had the disease. Although trigger thumb and finger have the same presentation, they can involve different anatomical structures. Bent or straightening of thumb or finger would produce painful popping and clicking and the affected finger or thumb can get stuck in bent and extended position. Based on physical examination and symptoms trigger finger are classified into four stages and each has its own treatment. There are evidences that support congenital hypothesis in pediatric trigger thumb such as bilateral presentation in identical twins, first degree familiar association and etc. Before the 1st year of life, 30% of trigger thumb will get resolved and it is better to postpone the surgery until 2 year of age. A1 pulley release has a good result in pediatric trigger thumb treatment.
Keywords: Congenital trigger thumb; Trigger finger; Trigger thumb.