S52.01 Torus fracture of upper end of ulna

Name of the Condition

• Torus Fracture of Upper End of Ulna
• ICD-10 Code: S52.01

Summary

A torus fracture of the upper end of the ulna is a stable, incomplete break in the proximal portion of the ulna, the inner bone of the forearm near the elbow. This type of fracture typically involves a buckling or compression of the bone cortex without significant displacement. It is most common in children due to their softer, more pliable bones. The fracture may affect the olecranon or coronoid processes, though the specific location is not detailed in this code. Treatment often focuses on immobilization to allow healing.

Causes

This fracture usually results from a direct force applied to the elbow, such as a fall onto an outstretched arm or a blow to the elbow. The torus pattern occurs when the bone bends but does not fully break, typically from low- to moderate-impact trauma. It may also occur during activities involving sudden forceful extension or compression of the elbow joint.

Risk Factors

• Participation in contact sports or activities with a risk of falls
• Childhood age (due to developing bone structure)
• Osteoporosis or weakened bone density
• Previous elbow or forearm injuries

Symptoms

• Pain and swelling around the elbow
• Tenderness at the injury site
• Limited range of motion in the elbow or forearm
• Bruising or mild deformity (less severe than complete fractures)
• Difficulty bearing weight or using the arm

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and range of motion. Imaging tests, such as X-rays, are typically used to confirm the fracture and evaluate bone alignment. The torus pattern appears as a buckled or compressed area of the bone cortex on imaging. Additional scans like CT may be used for complex cases.

Treatment Options

Treatment usually involves immobilization with a cast or splint to stabilize the fracture and allow healing. Pain management with over-the-counter or prescription medications may be recommended. Physical therapy is often prescribed after immobilization to restore strength and range of motion. Most torus fractures heal without surgery.

Prognosis and Follow-Up

Prognosis is generally favorable, with most fractures healing within 4–6 weeks. Follow-up appointments may include repeat imaging to confirm healing and assess alignment. Full recovery of strength and mobility is expected, though some residual stiffness may occur temporarily. Regular monitoring ensures proper healing and prevents complications.

Complications

• Delayed healing or nonunion (rare)
• Persistent pain or stiffness
• Malalignment if not properly immobilized
• Nerve or blood vessel injury (uncommon)
• Recurrence of fracture at the same site

Lifestyle & Prevention

• Use protective gear during sports or high-risk activities
• Maintain bone health through adequate calcium and vitamin D intake
• Avoid falls by using assistive devices if balance is impaired
• Strengthen forearm and elbow muscles to improve stability

When to Seek Professional Help

Seek immediate medical attention if there is severe pain, visible deformity, inability to move the arm, or signs of nerve or vascular compromise (e.g., numbness, coldness). Follow up with a healthcare provider if symptoms worsen or do not improve with initial treatment.

Tips for Medical Coders

Document the specific location (upper end of ulna) and fracture type (torus) to support accurate coding. Include details on trauma mechanism, imaging findings, and treatment to clarify the clinical context. Ensure documentation aligns with the ICD-10-CM guidelines for S52.01, avoiding ambiguity in the fracture description.