An os supranaviculare is an accessory ossicle of the foot, located at the proximal dorsal aspect of the navicular bone or talonavicular joint. It is also known as Piries bone, talonavicular dorsale, or (dorsal) talonavicular ossicle and is present in ~1% of the population.

Differential diagnosis

An os supratalare is also anatomically seen in close proximity, sitting above the talar beak, but not at the superior margin of the navicular bone.

Quiz questions

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References

1. Ingalls J, Wissman R. The os supranaviculare and navicular stress fractures. Skeletal Radiol. 2011;40 (7): 937-41. doi:10.1007/s00256-011-1154-y - Pubmed citation
2. Mellado JM, Ramos A, Salvadó E et-al. Accessory ossicles and sesamoid bones of the ankle and foot: imaging findings, clinical significance and differential diagnosis. Eur Radiol. 2003;13 Suppl 4 (S06): L164-77. doi:10.1007/s00330-003-2011-8 - Pubmed citation
3. Hoppenfeld S, Zeide M. Orthopaedic dictionary. Lippincott Williams & Wilkins. ISBN:0397513119. Read it at Google Books - Find it at Amazon

Related articles: Anatomy: Lower limb

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
      - postero-inferior
        
        obturator externus bursa
        
        obturator internus bursa
        
        ischiogluteal bursa
  - ossification centers
- knee joint
  - ligaments
  - additional structures
    - extensor mechanism of the knee
      - fat pads
        anterior knee fat pads
        
        infrapatellar fat pad (of Hoffa)
        
        posterior suprapatellar (prefemoral or supratrochlear) fat pad
        
        anterior suprapatellar (quadriceps) fat pad
    - groove for the popliteus tendon
    - knee bursae
      - anterior bursae
        
        suprapatellar bursa
        
        subcutaneous prepatellar bursa
        
        subcutaneous infrapatellar bursa
        
        deep infrapatellar bursa
      - medial bursae
      - lateral bursae
      - posterior bursae
    - knee capsule
      - knee synovial membrane
      - synovial plicae of the knee
        
        ligamentum mucosum
        
        medial patellar plica
    - lateral patellar retinaculum
    - medial patellar retinaculum
    - menisci
      - discoid meniscus
      - ring meniscus
    - pes anserinus (mnemonic)
      - pes anserinus bursa
  - ossification centers
- tibiofibular joints
  - proximal tibiofibular joint
  - distal tibiofibular syndesmosis
    - ligaments
- ankle joint
  - regional anatomy
    - medial ankle
    - lateral ankle
    - anterior ankle
  - ligaments
    - medial collateral (deltoid) ligament
      - superficial layer
        
        tibionavicular ligament
        
        tibiospring ligament
        
        tibiocalcaneal ligament
        
        superficial posterior tibiotalar ligament
      - deep layer
        
        anterior tibiotalar ligament
        
        deep posterior tibiotalar ligament
    - lateral collateral ligament
    - additional structures
    - ankle bursae
      - retrocalcaneal bursa
      - subcutaneous calcaneal bursa
  - ossification centers of the ankle
  - variants
    - ball and socket ankle joint
- foot joints
spaces of the lower limb
- adductor canal
- femoral sheath
  - femoral canal
    - femoral ring
- femoral triangle (contents mnemonic | boundaries mnemonic)
- foot subdivisions
- popliteal fossa (mnemonic)
- spring ligament recess
- tarsal tunnel (mnemonic)
- triangular space of cruciate ligaments
muscles of the lower limb
- muscles of the pelvic group
  - inner hip group
    - iliopsoas muscle
  - gluteal region
    - gluteal muscles
    - tensor fasciae latae muscle
  - lateral rotator group
- muscles of the thigh
- muscles of the leg
  - anterior compartment of the leg
  - posterior compartments of the leg
    - superficial posterior compartment of the leg (calf)
      - triceps surae muscle
        
        medial and lateral heads of the gastrocnemius muscle
        
        soleus muscle
        accessory soleus muscle
      - plantaris muscle
      - calcaneal tendon
    - deep posterior compartment of the leg
  - lateral compartment of the leg
    - peroneus brevis muscle
    - peroneus longus muscle
- muscles of the foot
  - dorsal muscles
    - extensor hallucis brevis muscle
    - extensor digitorum brevis muscle
  - plantar muscles
    - 1st layer
    - 2nd layer
      - quadratus plantae muscle
      - lumbrical muscles
    - 3rd layer
    - 4th layer
      - dorsal interossei muscles
      - plantar interossei muscles
- accessory muscles of the lower limb
  - accessory gluteal muscles
    - gluteus quartus muscle
  - accessory muscles of the ankle
vascular supply of the lower limb
- arterial supply of the lower limb
- venous drainage of the lower limb
  - deep system
    - common femoral vein
      - femoral vein
        
        deep femoral vein
        
        popliteal vein
        
        peroneal vein
        
        posterior tibial vein
        
        anterior tibial vein
  - superficial system
  - venous drainage of the foot
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
  - inguinal lymph nodes
    - superficial inguinal lymph nodes
    - deep inguinal lymph nodes
  - popliteal lymph nodes