LSTV

Lumbosacral Transitional Vertebrae (LSTV) – Castellvi Classification

Lumbosacral Transitional Vertebrae (LSTV) adalah kelainan kongenital pada tulang belakang dapat berupa sacralisasi dari segmen lumbar terbawah atau lumbalisasi dari segmen sacrum superior.1

Castellvi mengklasifikasikan kelainan ini menjadi 4 tipe berdasarkan morfologinya

Castellvi classification

I: dysplastic transverse processes, defined as measuring at least 19 mm in width –  it can be unilateral (Ia) or bilateral (Ib)
II: incomplete unilateral (IIa) (IIb) lumbarization/sacralization with an enlarged transverse process that has a diarthrodial joint between itself and the sacrum.
III: lumbarization/sacralization with complete osseous fusion of the transverse process(es) to the sacrum, unilateral (IIIa) or bilateral (IIIb)
IV: (Mixed) involves a unilateral type II transition with a type III on the contralateral side

 

Radiographs demonstrate the Castellvi classification of LSTV: (a) Type I: dysplastic enlarged transverse process (arrow); (b) Type II: pseudoarticulation of the transverse process with the sacrum with increased sclerosis (arrows); (c) Type III: fusion with the sacrum (arrows); (d) Type IV: unilateral LSTV type II (long arrow) with type III on the contralateral side (short arrow).

Sumber:

  1. Konin GP, et al. Lumbosacral transitional vertebrae: classification, imaging findings,
    and clinical relevance. AJNR Am J Neuroradiol. 2010 Nov;31(10):1778-86.
  2. Castellvi AE, et al. Lumbosacral transitional vertebrae and their relationship with lumbar
    extradural defects. Spine (Phila Pa 1976). 1984 Jul-Aug;9(5):493-5.3 Castellvi AE, et al. Lumbosacral transitional vertebrae and their relationship with lumbar
    extradural defects. Spine (Phila Pa 1976). 1984 Jul-Aug;9(5):493-5.
  3. Nardo L, Alizai H, Virayavanich W, et al. Lumbosacral transitional vertebrae: association with low back pain. Radiology. 2012;265(2):497–503. doi:10.1148/radiol.12112747
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