Thigh Bruise Anatomy
To better understand a leg contusion, it helps to understand the anatomy of the leg.
The entire leg contains four bones:
The thigh contains the largest bone in the body, called the femur. The femur begins at the hip and ends at the knee. The muscles of the thigh control movement of the knee and hip. The patella, or kneecap, protects the front of the knee.
The lower leg contains two long bones, called the tibia and fibula. The muscles of the lower leg control movement of the foot and ankle.
Leg anatomy examples:
- Beiner JM, Jokl P. Muscle contusion injuries: current treatment options. J Am Acad Orthop Surg. 2001 Jul-Aug;9(4):227-37. 
- Berg E. Deep muscle contusion complicated by myositis ossificans (a.k.a. heterotopic bone). Orthop Nurs. 2000 Nov-Dec;19(6):66-7. 
- Centeno CJ, Freeman M, Elkins WL. A review of the literature refuting the concept of minor impact soft tissue injury. Pain Res Manag. 2005 Summer;10(2):71-4. 
- Guzman J, Yassi A, Cooper JE, Khokhar J. Return to work after occupational injury. Family physicians' perspectives on soft-tissue injuries. Can Fam Physician. 2002 Dec;48:1912-9. 
- Tull F, Borrelli J Jr. Soft-tissue injury associated with closed fractures: evaluation and management. J Am Acad Orthop Surg. 2003 Nov-Dec;11(6):431-8.