Cyamella
Citation, DOI, disclosures and article data
Citation:
Skalski M, Feger J, Walizai T, et al. Cyamella. Reference article, Radiopaedia.org (Accessed on 20 Feb 2025) https://doi.org/10.53347/rID-25083
Permalink:
rID:
25083
Article created:
Disclosures:
At the time the article was created Matt Skalski had no recorded disclosures.
View Matt Skalski's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Joachim Feger had no financial relationships to ineligible companies to disclose.
View Joachim Feger's current disclosures
Revisions:
27 times, by
17 contributors -
see full revision history and disclosures
Systems:
Sections:
Synonyms:
- Popliteal sesamoid bone
- Sesamoid bone of the popliteus muscle
A cyamella is a rare sesamoid bone that exists as a normal variant within the popliteus tendon, characteristically located at the lateral aspect of the distal femur in the popliteal groove.
Cyamella is best seen on the AP view of plain radiograph as opposed to the fabella, which is located in the lateral head of the gastrocnemius and best appreciated on the lateral view.
It is seen more commonly in less advanced primates 3 and in a high proportion of dogs 4.
References
- 1. Keats TE, Anderson MW. Atlas of Normal Roentgen Variants That May Simulate Disease. Elsevier Health Sciences. (2012) ISBN:0323091288. Read it at Google Books - Find it at Amazon
- 2. Le Minor JM. Brief communication: the popliteal sesamoid bone (cyamella) in primates. Am. J. Phys. Anthropol. 1992;87 (1): 107-10. doi:10.1002/ajpa.1330870109 - Pubmed citation
- 3. Benthien JP, Brunner A. A symptomatic sesamoid bone in the popliteus muscle (cyamella). Musculoskelet Surg. 2010;94 (3): 141-4. doi:10.1007/s12306-010-0083-6 - Pubmed citation
- 4. Thrall DE. 2013. Textbook of Veterinary Diagnostic Radiology. Elsevier-Saunders, St. Louis, Missouri. 847 pp.
Incoming Links
Related articles: Anatomy: Lower limb
- skeleton of the lower limb
- joints of the lower limb
-
hip joint
- ligaments
- muscles
- additional structures
- hip joint capsule
- zona orbicularis
- iliotibial band
-
hip bursae
- anterior
- iliopsoas bursa (iliopectineal bursa)
- lateral
- subgluteal bursae
- greater trochanteric bursa (subgluteus maximus bursa)
- subgluteus medius bursa
- subgluteus minimus bursa
- gluteofemoral bursa
- subgluteal bursae
- postero-inferior
- anterior
- ossification centers
-
knee joint
- ligaments
- anterior cruciate ligament
- posterior cruciate ligament
- medial collateral ligament
- lateral collateral ligament
- meniscofemoral ligament (mnemonic)
-
posterolateral ligamentous complex
- arcuate ligament
- patellar tendon and quadriceps tendon
- anterolateral ligament
- posterior oblique ligament
- oblique popliteal ligament
- medial patellofemoral ligament
- additional structures
- extensor mechanism of the knee
- groove for the popliteus tendon
- knee bursae
- anterior bursae
- medial bursae
- lateral bursae
- posterior bursae
- knee capsule
- lateral patellar retinaculum
- medial patellar retinaculum
- menisci
- pes anserinus (mnemonic)
- ossification centers
- ligaments
- tibiofibular joints
-
ankle joint
- regional anatomy
- medial ankle
- lateral ankle
- anterior ankle
- ligaments
- medial collateral (deltoid) ligament
- lateral collateral ligament
- additional structures
- ankle bursae
- ossification centers of the ankle
- variants
- regional anatomy
- foot joints
- subtalar joint
- mid-tarsal (Chopart) joint
-
tarsometatarsal (Lisfranc) joint
- ligaments
- intermetatarsal joint
- metatarsophalangeal joint
- interphalangeal joint
- ossification centers
-
hip joint
- spaces of the lower limb
-
muscles of the lower limb
- muscles of the pelvic group
- muscles of the thigh
- muscles of the leg
- anterior compartment of the leg
- posterior compartments of the leg
- lateral compartment of the leg
- muscles of the foot
- dorsal muscles
- plantar muscles
- 1st layer
- 2nd layer
- 3rd layer
- 4th layer
- accessory muscles of the lower limb
- accessory gluteal muscles
-
accessory muscles of the ankle
- accessory peroneal muscles
- accessory flexor digitorum longus muscle
- accessory soleus muscle
- peroneocalcaneus internus muscle
- tibiocalcaneus internus muscle
- extensor hallucis capsularis tendon
- anterior fibulocalcaneus muscle
- accessory extensor digiti secundus muscle
- tibioastragalus anticus of Gruber muscle
- vascular supply of the lower limb
- arterial supply of the lower limb
- venous drainage of the lower limb
- innervation of the lower limb
- lymphatic system of the lower limb
- lymphatic pathways
- anteromedial group
- anterolateral group
- posteromedial group
- posterolateral group
- lower limb lymph nodes
- lymphatic pathways