ICD-10: H50.65

Clinical Description of ICD-10 Code H50.65: Medial Rectus Muscle Entrapment

ICD-10 code H50.65 refers specifically to medial rectus muscle entrapment, a condition that affects the eye's ability to move properly due to the entrapment of the medial rectus muscle. This muscle is one of the six extraocular muscles responsible for controlling eye movement, particularly the inward movement of the eye (adduction).

Pathophysiology

Medial rectus muscle entrapment typically occurs when the muscle becomes trapped within the orbit, often due to trauma, such as a fracture of the orbital bones. This entrapment can lead to restricted eye movement, resulting in strabismus (misalignment of the eyes) and diplopia (double vision). The condition may also be associated with swelling or inflammation in the area surrounding the muscle, further complicating the clinical picture.

Clinical Presentation

Patients with medial rectus muscle entrapment may present with the following symptoms:

• Limited Eye Movement: Difficulty moving the affected eye inward, which can lead to compensatory head postures.
• Diplopia: Double vision, particularly when looking to the side opposite the affected eye.
• Pain: Discomfort or pain around the eye, especially during eye movement.
• Swelling: Possible swelling or bruising around the orbit, particularly if the entrapment is due to trauma.

Diagnosis

Diagnosis of medial rectus muscle entrapment typically involves:

• Clinical Examination: An ophthalmologist will assess eye movements and alignment.
• Imaging Studies: CT scans or MRI may be utilized to visualize the orbit and confirm the presence of muscle entrapment or associated fractures.

Treatment Options

Management of medial rectus muscle entrapment may vary based on the severity of the condition and the underlying cause:

• Observation: In mild cases, monitoring may be sufficient, as some patients may recover spontaneously.
• Surgical Intervention: In cases where there is significant restriction of movement or persistent symptoms, surgical release of the entrapped muscle may be necessary.
• Rehabilitation: Vision therapy may be recommended to help improve eye coordination and reduce diplopia.

Conclusion

ICD-10 code H50.65 encapsulates a specific and clinically significant condition involving the medial rectus muscle. Understanding the pathophysiology, clinical presentation, and treatment options is crucial for healthcare providers in diagnosing and managing this condition effectively. Early intervention can help alleviate symptoms and improve the quality of life for affected individuals, making awareness of this diagnosis essential in clinical practice.