Calcifying aponeurotic fibroma of the hand in an adult.

We report a case of CAF in the hand of a young adult woman. This patient's age exceeded the usual range for CAF. While surgical excision led to fifth digit stiffness and bowstringing, further diagnostic delays could have resulted in much worse outcomes due to tumor invasion of the tendons. This case suggests reevaluating the upper age limit for diagnosis and considering CAF in adults with suggestive clinical features.