Is OS Peroneum painful?

The os peroneum (OP) is a small sesamoid bone located inside the peroneus longus tendon (PLT), close to the cuboid. The OP can be the cause of pain and can be associated with lesions of the PLT.

Does peroneal tendonitis show on MRI?

MRI is a useful diagnostic tool for detecting peroneal tendinopathy in patients with chronic lateral ankle instability.

Does OS Peroneum require surgery?

Background. The os peroneum is a sesamoid bone in the peroneus longus tendon. Fractures of the os peroneum are rare. Some authors recommend surgery for active patients.

What does small OS Peroneum mean?

An os peroneum is a small accessory bone of the foot located at the lateral plantar aspect of the cuboid within the substance of the peroneus longus tendon as it arches around the cuboid.

What is OS Peroneum fracture?

The os peroneum is an accessory ossicle whose malposition can suggest injury to the peroneus longus tendon and can be diagnosed with radiography. Fractures of this ossicle can also occur and can be associated with tendon injury, but must be distinguished from bipartite or multipartite ossicles.

What causes peroneus longus pain?

Symptoms and Causes Peroneal tendon inflammation can develop over time with repetitive overuse of the tendons. Or it might happen suddenly due to an acute ankle injury like a sprain. The tendons or the lubricated sheath that surrounds the tendons can swell, making it hard for them to move smoothly.

What can peroneal tendonitis be mistaken for?

Acute peroneal dislocations are misdiagnosed in up to 40% of cases, often mistaken for lateral ankle ligament sprains.

Can you see peroneal subluxation on MRI?

MRI Evaluation. Although a small shell-like avulsion fracture off of the lateral malleolus may occasionally be found radiographically (type III SPR injury), this is absent in the majority of cases of peroneal tendon subluxation/dislocation.

Is OS Peroneum an extra bone?

The os peroneum is an accessory bone that is located in the peroneus longus tendon which passes over the lateral aspect of the foot. About 1 in 5 people have this extra bone.

Where is the OS Peroneum located?

Os peroneum is one of several accessory ossicles of the foot and ankle, located lateral to the cuboid within the distal peroneus longus tendon.

What causes a OS Peroneum fracture?

[1] Acute fracture of the os peroneum is most commonly caused by strong contraction of the peroneus longus muscle with associated inversion or supination.

What is painful OS peroneum syndrome?

In about 20% of individuals, the peroneus longus has as a sesamoid bone within the tendon, the os peroneum, which can cause pain and lead to tendon tear called the Painful Os Peroneum Syndrome or POPS. The POPS syndrome is caused by a fracture of the Os, a tear of the peroneus longus tendon, or entrapment by an enlarged peroneal tubercle laterally.

What is the role of MRI in the diagnosis of OS peroneum?

Radiographic images can help in demonstrating any abnormal displacement of the os peroneum, fracture, or diatasis of a bipartite sesamoid. MRI is considered to be the gold standard for the detection of painful os peroneum syndrome.

How is OS peroneum syndrome (OSP) diagnosed?

Clinical diagnosis of os peroneum syndrome should involve physical examination that can help reveal swelling over the cuboid with pain felt during palpation. The patient will feel this pain intensify during plantar flexion, and during the heel elevation stage of the gait process.

What is the pathophysiology of peroneus longus tendon pain syndrome (Pops)?

POPS can result in tenosynovitis or discontinuity of the peroneus longus tendon with a clinical presentation of pain in the lateral aspect of the midfoot. Authors report a typical case of POPS, illustrating this entity through different imaging methods (radiographs, ultrasound, and magnetic resonance imaging).