Snapping knee caused by medial meniscal cyst.

Area of Science:

• Orthopedics
• Sports Medicine
• Musculoskeletal Disorders

Background:

• Snapping knee phenomenon, particularly around the medial aspect, is an uncommon clinical presentation.
• The sartorius muscle is rarely implicated as a cause of snapping knee syndrome.

Purpose of the Study:

• To report a rare case of snapping knee caused by the sartorius muscle.
• To describe the diagnostic findings and successful treatment of a medial meniscal cyst causing this condition.

Main Methods:

• Magnetic resonance imaging (MRI) was utilized to diagnose the cause of the snapping knee.
• The patient underwent arthroscopic surgery, including cyst decompression and limited meniscectomy.

Main Results:

• MRI revealed a large medial meniscal cyst with an associated horizontal tear of the medial meniscus.
• Arthroscopic intervention led to complete resolution of the snapping knee symptoms.
• No recurrence of the meniscal cyst was noted during a two-year follow-up period.

Conclusions:

• The sartorius muscle can cause snapping knee by impinging on a medial meniscal cyst.
• Arthroscopic management of medial meniscal cysts is an effective treatment for associated snapping knee.
• Surgical decompression and meniscectomy offer a durable solution for this rare condition.