Proximal femur fracture in paediatric patients are very rare and can easily be missed especially when the history of trauma is so trivial, and associated with pathological fracture. We report a case of 6-year-old girl with a history of left knee pain following a fall from a height of 2 feet. She was treated as a soft tissue injury of the left knee as the left knee radiograph was normal. She was reassessed at day 3 of injury with worsening symptoms. Radiograph of the pelvis and left knee revealed a comminuted intertrochanteric fracture of left femur with an underlying bone cyst. We would like to highlight this case report to avoid missing a proximal femur fracture where a trivial trauma resulted In the presentation of a non-specific knee pain. Femur fracture in peadiatric age group can result in the significant complication of growth such as osteoporosis.