A small boy who is brought to the emergency department by his parents is found to have a spiral fracture of the femur, with a variety of ecchymoses. What is the most likely cause of the injuries –: (A) Automobile hit – and – run accident, (B) Fall from a tree, (C) Child abuse, (D) Fall from a bicycle
Answer is C. The fracture can occur in all the four options given in questions.
But, a variety of ecchymoses suggests child abuse -

"Bruises are the most common manifestation of child abuse and may be found on anybody surface".