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Figure 583 Ventrodorsal projection of hip joints and pelvis.
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To simplify the labelling each structure has been numbered on one side or the other but not on both sides. Also the vertebral column has not been fully labelled.


A Ilium


1 Crest


2 Gluteal surface


3 Cranial dorsal iliac spine


4 Caudal dorsal iliac spine


Numbers 3 and 4 form the tuber sacrale or dorsal iliac spine.


5 Wing


6 Cranial ventral iliac spine


7 Caudal ventral iliac spine


Numbers 6 and 7 form the tuber coxae or ventral iliac spine.


8 Body


B Pubis


9 Pecten


Pubic symphysis, part of the symphysis of the pelvis, is not recognisable due to superimposition of coccygeal or caudal vertebrae.


C Ischium


10 Ischiatic symphysis, part of the symphysis of the pelvis


11 Obturator foramen


12 Ischiatic spine


13 Ischiatic table


14 Ischiatic tuberosity


15 Ischiatic arch


D Acetabulum


16 Cranial acetabular edge


17 Dorsal acetabular edge


18 Ventral acetabular edge


19 Acetabular fossa


20 Acetabular notch


E Femur


21 Head


22 Neck


23 Greater trochanter


23(a) Trochanteric fossa


24 Lesser trochanter


25 Body


F Sacrum


26 Cranial articular process


27 Wing


28 Lateral sacral crest


29 Intermediate sacral crest


30 Median sacral crest


31 Articular surface with ilium wing


32 Sacroiliac joint


32(a) Region of synchrondrosis


32(b) Region of synovial joint


G 7th lumbar vertebra


H Coccygeal or caudal vertebra



Figure 584 Lateral projection of hip joints and pelvis. British Domestic Short Haired cat 4 years old, neutered female. (Approximately 170% of original size.)
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Figure 585 Lateral projection of hip joints and pelvis.
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A Ilium


1 Crest


2 Cranial dorsal iliac spine


3 Caudal dorsal iliac spine


Numbers 2 and 3 form the tuber sacrale or dorsal iliac spine.


4 Cranial ventral iliac spine


5 Caudal ventral iliac spine


Numbers 4 and 5 form the tuber coxae or ventral iliac spine.


6 Wing


7 Body


B Pubis


8 Iliopubic eminence


9 Pecten


10 Pubic tubercle. Cranial limit of the pubic part of the pelvic symphysis.


C Ischium


11 Pelvic symphysis


12 Obturator foramen


13 Ischiatic spine


14 Ischiatic tuberosity


15 Ischiatic table


D Acetabulum


E Femur


16 Head


17 Greater trochanter


18 Lesser trochanter


F Sacrum


19 Sacroiliac articulation


20 Median sacral crest


21 Vertebral canal


G 7th lumbar vertebra


H Coccygeal or caudal vertebra


Femur, including craniocaudal illustrating medial fabella: Figures 586590



Figure 586 Mediolateral projection of femur. British Domestic Short Haired cat 6 years old, neutered male. (Approximately 150% of original size.)
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Figure 587 Mediolateral projection of femur.
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A Ilium


B Acetabulum


C Pubis


D Ischium


1 Obturator foramen


E Femur


2 Head


3 Neck


4 Greater trochanter


5 Lesser trochanter


6 Trochanteric fossa


7 Body


8 Trochlear groove


9 Trochlear ridge


10 Superimposed lateral and medial condyles


11 Base of intercondyloid fossa


F Tibia


12 Lateral condyle


13 Medial condyle


14 Intercondyloid eminence (more caudal shadow is that of the lateral intercondyloid tubercle)


15 Tibial tuberosity


16 Cranial border or ‘tibial crest’ as formerly known


G Fibula


H Patella


I Fabella of lateral head of m. gastrocnemius. (No ossified fabella visible on the medial side in this cat. This is a common finding in the cat. Figures 586 and 588 of the femur are of the same cat.)


J Fabella of m. popliteus



Figure 588 Craniocaudal projection of femur. British Domestic Short Haired cat 6 years old, neutered male. (Approximately 130% of original size.)
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Figure 589 Craniocaudal projection of femur.
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A Ilium


B Pubis


C Acetabulum


1 Cranial acetabular edge


2 Dorsal acetabular edge


3 Ventral acetabular edge


4 Acetabular fossa


4(a) Acetabular fissure


D Ischium


5 Obturator foramen


6 Ischiatic tuberosity


E Coccygeal or caudal vertebrae


F Femur


7 Head


8 Neck


9 Greater trochanter


9(a) Trochanteric fossa


10 Lesser trochanter


11 Body


12 Medial condyle


13 Lateral condyle


14 Intercondyloid fossa


G Tibia


15 Medial condyle


16 Lateral condyle


17 Intercondyloid eminence (medial and lateral intercondyloid tubercles are clearly seen)


H Patella


I Lateral fabella of m. gastrocnemius. (No ossified medial fabella is visible in this cat. This is a common finding in the cat. Figures 586 and 588 of the femur are of the same cat.)


J Fabella of m. popliteus


K Fibula



Figure 590 Craniocaudal projection of femur. British Domestic Short Haired cat 11 months old, neutered female. (Approximately 160% of original size.)
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The radiograph has been included to demonstrate the ossified medial fabella in the tendon of the m. gastrocnemius. The medial fabella is commonly not seen in radiographs. This is usually due to non-mineralisation of the sesamoid fibrocartilage rather than agenesis.


Stifle joint: Figures 591594



Figure 591 Mediolateral projection of stifle joint. British Domestic Short Haired cat 2 years old, neutered female. (Approximately 200% of original size.)



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Figure 592 Mediolateral projection of stifle joint.
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A Femur


1 Trochlear groove


2 Medial trochlear ridge


3 Lateral trochlear ridge


4 Medial condyle


5 Lateral condyle


6 Intercondyloid fossa


B Patella


C Lateral fabella of m. gastrocnemius. (No ossified medial fabella is visible in this cat. Also not seen in radiographic and drawing Figures 593 and 594 of the 6 year old cat.)


D Fabella of m. popliteus


E Tibia


7 Medial condyle


8 Lateral condyle


9 Intercondyloid eminence


10 Tibial tuberosity


11 Cranial border or ‘tibial crest’ as formerly known


F Fibula


12 Head



Figure 593 Caudocranial projection of stifle joint. British Domestic Short Haired cat 6 years old, neutered male. (Approximately 190% of original size.)
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Figure 594 Caudocranial projection of stifle joint.
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A Femur


1 Medial condyle


2 Lateral condyle


3 Intercondyloid fossa


4 Popliteal fossa


B Patella


C Lateral fabella of m. gastrocnemius. (No ossified medial fabella is visible in this cat. Also not seen in radiographic and drawing Figures 591 and 592 of the 2 year old cat.)


D Fabella of m. popliteus


E Tibia


5 Medial condyle


6 Lateral condyle


7 Intercondyloid eminence (medial and lateral intercondyloid tubercles)


8 Tibial tuberosity


9 Cranial border or ‘tibial crest’ as formerly known


F Fibula


10 Head


Tibia and fibula: Figures 595598



Figure 595 Mediolateral projection of tibia and fibula. British Domestic Short Haired cat 2 years old, neutered female. (Approximately 150% of original size.)
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Figure 596 Mediolateral projection of tibia and fibula.
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A Femur


1 Lateral condyle


2 Medial condyle


3 Base of intercondyloid fossa


B Tibia


4 Lateral condyle


5 Medial condyle


6 Intercondyloid eminence


7 Tibial tuberosity


8 Cranial border or ‘tibial crest’ as formerly known


9 Medial malleolus


C Fibula


10 Head


11 Lateral malleolus


D Fabella of m. popliteus


E Tibial tarsal bone or talus


12 Medial trochlear ridge


13 Lateral trochlear ridge


F Fibular tarsal bone or calcaneus


14 Calcaneal tuber


15 Sustentaculum tali



Figure 597 Caudocranial projection of tibia and fibula. British Domestic Short Haired cat 2 years old, neutered female. (Approximately 150% of original size.)
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Figure 598 Caudocranial projection of tibia and fibula.
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A Femur


1 Medial condyle


2 Lateral condyle


3 Intercondyloid fossa


B Patella


C Lateral fabella of m. gastrocnemius. (No ossified medial fabella is visible in this cat.)


D Fabella of m. popliteus


E Tibia


4 Medial condyle


5 Lateral condyle


6 Intercondyloid eminence (lateral and medial intercondyloid tubercles)


7 Medial malleolus


F Fibula


8 Head


9 Lateral malleolus


G Fibular tarsal bone or calcaneus


H Tibial tarsal bone or talus



Figure 599 Plantarodorsal projection of tarsus, metatarsus and phalanges. British Domestic Short Haired cat 3 years old, neutered male. (Approximately 150% of original size.)
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Figure 600 Plantarodorsal projection of tarsus, metatarsus and phalanges.

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A Tibia


1 Medial malleolus


1(a) Groove for tendon of m. flexor digitorum longus


2 Distal articular borders


B Fibula


3 Lateral malleolus


3(a) Groove for tendon of m. fibularis longus


3(b) Groove for tendon of m. fibularis brevis and m. extensor digitorum lateralis


C Tibial tarsal bone or talus


4 Medial trochlear ridge


5 Lateral trochlear ridge


6 Head


D Fibular tarsal bone or calcaneus


7 Calcaneal tuber


8 Sustentaculum tali


E Central tarsal bone


F Tarsal bone 1


G Tarsal bone 2


H Tarsal bone 3


I Tarsal bone 4


J Metatarsal bone 1


K Metatarsal bone 2


L Metatarsal bone 3


M Metatarsal bone 4


N Metatarsal bone 5


9 Base


10 Body


11 Head


O Proximal sesamoids. Present on the plantar aspect.


P Proximal phalanges


Q Middle phalanges


12 Base


13 Body


14 Head


R Distal phalanges


15 Ungual crest


16 Ungual process


17 Flexor tubercle



Figure 601 Mediolateral projection of tarsus, metatarsus and phalanges. British Domestic Short Haired cat 3 years old, neutered male. (Approximately 160% of original size.)
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Jun 23, 2017 | Posted by in ANIMAL RADIOLOGY | Comments Off on Hindlimb
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