Castellvi classification of lumbosacral transitional vertebrae
The Castellvi classification is used for lumbosacral transitional vertebra (LSTV):
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type I: enlarged and dysplastic transverse (at least 19 mm)
- Ia: unilateral
- Ib: bilateral
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type II: pseudoarticulation of the transverse process and sacrum with incomplete lumbarisation/sacralisation; enlargement of the transverse process with pseudoarthrosis
- IIa: unilateral
- IIb: bilateral
-
type III: transverse process fuses with the sacrum and there is complete lumbarisation or sacralisation, enlarged transverse process with complete fusion
- IIIa: unilateral
- IIIb: bilateral
- type IV: type IIa on one side and type III on the contralateral side
Related pathology
Related Radiopaedia articles
Anatomy: Spine
-
osteology
- vertebrae
- spinal canal
- cervical spine
- thoracic spine
- lumbar spine
- sacrum
- coccyx
-
anatomical variants
- vertebral body
- neural arch
- transitional vertebrae
- ossicles
- ossification centers
- intervertebral disk
- articulations
- ligaments
- musculature of the vertebral column
- muscles of the neck
- muscles of the back
-
suboccipital muscle group
- rectus capitis posterior major muscle
- rectus capitis posterior minor muscle
- obliquus capitis superior muscle
- obliquus capitis inferior muscle
- splenius capitis muscle
- splenius cervicis muscle
- erector spinae group
- transversospinalis group
- quadratus lumborum
-
suboccipital muscle group
-
spinal cord
- gross anatomy
-
white matter tracts (white matter)
- anterolateral columns
- lateral columns
-
dorsal columns
- fasiculus gracilis (column of Goll)
- fasiculus cuneatus (column of Burdach)
- grey matter
- nerve root
- spinal meninges and spaces
- functional anatomy
- spinal cord blood supply
- sympathetic chain
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