Is fabella a sesamoid bone?
The fabella is a sesamoid bone that is embedded in the lateral head of the gastrocnemius muscle and often articulates directly with the lateral femoral condyle. It is present in 10-30% of the general population with a higher incidence in Asians.
How do I know if I have fabella?
Medical professionals search for the fabella bone by palpating at the back of the knee and checking for swelling or tenderness in the surrounding area. If they believe the fabella is indeed the reason, an ultrasound or magnetic resonance imaging (MRI) is used to confirm their diagnosis.
How common is fabella?
The fabella is a sesamoid bone located behind the lateral femoral condyle. It is common in non‐human mammals, but the prevalence rates in humans vary from 3 to 87%.
What percentage of people have a fabella?
Their analysis showed that in 1918, fabellae were present in 11.2 per cent of the world population, and by 2018, they were present in 39 per cent – a 3.5-fold increase.
What is an OS fabella?
The fabella is an accessory ossicle most always found in the lateral head of the gastrocnemius, rarely can occur at the medial head of gastrocnemius 4. It occurs in ~20% (range 10-30%) of the population 1. The fabella articulates with its respective (medial or lateral) femoral condyle.
Is OS Trigonum a sesamoid bone?
Both sesamoid bones and accessory ossicles can be affected by trauma, infection, degenerative disease and osteonecrosis. Due to their locations in the foot, the hallucal sesamoids and the os trigonum are more susceptible to trauma and fracture.
What is OS fabella?
The fabella is a sesamoid bone in the posterolateral capsule of the human knee joint. It articulates with the posterior part of the articular surface of the lateral femoral condyle and is embedded in the muscular fibres of the gastrocnemius muscle [5].
What does the fabella bone look like?
The fabella is a small sesamoid bone found in some mammals embedded in the tendon of the lateral head of the gastrocnemius muscle behind the lateral condyle of the femur. It is an accessory bone, an anatomical variation present in 39% of humans….
| Fabella | |
|---|---|
| Latin | Os fabella |
| TA2 | 1395 |
| FMA | 281591 |
| Anatomical terminology |
Can a fabella be removed?
After the arthroscopic visualization of the fabella along with assessment of damage to the surrounding structures, the fabella is excised. The use of the arthroscopic procedure allows for excision of this sesamoid bone with minimal resection, thereby decreasing the risk of injury to surrounding tissue.
Is fabella normal?
The fabella is a sesamoid bone in the posterolateral capsule of the human knee joint. The presence of the fabella in humans varies widely and is reported in the literature to range from 20% to 87% [1-7].
What is an os bone?
The os trigonum is an extra (accessory) bone that sometimes develops behind the ankle bone (talus). It is connected to the talus by a fibrous band. The presence of an os trigonum in one or both feet is congenital (present at birth).
Does everyone have sesamoid bones?
Most people have five sesamoid bones in each hand. Two at the thumb metacarpophalangeal joint, one at the interphalangeal joint of the thumb, one at the metacarpophalangeal joint of the index finger on the radial side, and one at the metacarpophalangeal joint of the little finger on the ulnar side.