Multistage surgical treatment of early-onset scoliosis in patients with Ehlers-Danlos syndrome: A series of observations

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Abstract

BACKGROUND: Ehlers–Danlos syndrome (EDS) is a group of hereditary pathological conditions caused by various disorders of collagen biosynthesis. The study analyzed the results of multistage surgical treatment of early scoliosis in patients with severe spinal deformities due to EDS. No similar observations have been found in the literature.

CLINICAL CASES: Four patients with a verified diagnosis of EDS and progressive spinal deformities were subjected to multistage surgical treatment using the VEPTRII instrumentation, which included periodic distractions and “final” spinal fusion with segmental instrumentation. Stage-by-stage surgical treatment was initiated from the age of 3 to 6 years. In 3 of 4 cases, the kyphotic component prevailed over the scoliotic one (86°–140° vs. 21°–110°). The number of staged distractions ranged from 6 to 10. The age of the final stage (correction and dorsal fusion) was 9–14 years (surgery was performed in three of four cases). The primary correction was 30°–56°, the loss of correction before the final stage was 14°–35°, and the correction during the final stage was 22°–40°. A significant correction of the frontal and sagittal imbalances of the spine was noted. Blood loss during the “final” fusion was 540–750 mL, and the operation time was 310–350 min. Ten complications occurred, of which 9 were associated with implants and disappeared during staged distractions. No neurological and vascular complications occurred.

DISCUSSION: Scoliosis occurring in the first decade of life in patients with EDS is characterized by early-onset, rapid progression, and tendency to form a significant kyphotic component of spinal deformity.

CONCLUSIONS: Multistage treatment of early scoliosis in patients with EDS using VEPTRII tools allows for obtaining quite satisfactory results and has not severe complications. The “final” fusion gives a significant corrective effect; however, new research and accumulation of data are needed to optimize the treatment process.

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About the authors

Mikhail V. Mikhaylovskiy

Novosibirsk Research Institute of Traumatology & Orthopedics

Author for correspondence.
Email: MMihailovsky@niito.ru
ORCID iD: 0000-0002-4847-100X
SPIN-code: 5828-8306
Scopus Author ID: 57028305800
ResearcherId: C-5483-2017

MD, PhD, Dr. Sci. (Med.), Professor

Russian Federation, Novosibirsk

Vasiliy A. Suzdalov

Novosibirsk Research Institute of Traumatology & Orthopedics

Email: vsuzdalov@mail.ru
ORCID iD: 0000-0003-2581-1638
SPIN-code: 5287-6560
Scopus Author ID: 57203745429
ResearcherId: AAP-2266-2020

MD, PhD, Cand. Sci. (Med.)

Russian Federation, Novosibirsk

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Supplementary files

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2. Fig. 1. Spondylograms of patient P.: a, b, before surgical treatment (scoliosis 71°, countercurvature 53°, kyphosis 86°, lumbar lordosis smoothed, frontal imbalance to the right 41 mm, and sagittal imbalance +6 mm); c, d, after primary correction (scoliosis 44°, countercurvature 41°, kyphosis 56°, lumbar lordosis 45°, frontal imbalance to the right 4 mm, and sagittal imbalance +20 mm); e, f, before the final fusion (scoliosis 72°, countercurvature 69°, kyphosis 76°, lumbar lordosis 67°, frontal imbalance to the right 24 mm, and sagittal imbalance +5 mm); g, h, after final fusion (scoliosis 65°, countercurvature 55°; kyphosis 54°, lumbar lordosis 36°, frontal imbalance to the right 15 mm, and sagittal imbalance –12 mm)

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3. Fig. 2. Spondylograms of patient T.: a, b, before surgical treatment (scoliosis 110°, kyphosis 142°, lumbar lordosis 71°, frontal imbalance to the left 7 mm, and sagittal imbalance +5 mm); c, d, after primary correction (scoliosis 75°, kyphosis 104°, lumbar lordosis 47°, frontal imbalance to the left 34 mm, and sagittal imbalance +17 mm); e, f, before the final fusion (scoliosis 96°, kyphosis 139°, lumbar lordosis 81°, frontal imbalance to the left 29 mm, and sagittal imbalance +40 mm); g, h, after final fusion (scoliosis 82°, kyphosis 99°, lumbar lordosis 83°, frontal imbalance to the left 25 mm, and sagittal imbalance –12 mm)

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4. Fig. 3. Spondylograms of patient S.: a, b, before surgical treatment (scoliosis 41°, countercurvature 21°, kyphosis 103°, lumbar lordosis 66°, frontal imbalance to the right 18 mm, and sagittal imbalance +10 mm); c, d, after primary correction (scoliosis 33°, countercurvature 16°, kyphosis 47°, lumbar lordosis 50°, frontal imbalance to the right 14 mm, and sagittal imbalance –15 mm); e, f, before the final fusion (scoliosis 56°, countercurvature 49°, kyphosis 77°, lumbar lordosis 36°, frontal imbalance to the left 5 mm, and sagittal imbalance +5 mm); g, h, after final fusion (scoliosis 33°, countercurvature 38°, kyphosis 39°, lumbar lordosis 48°, frontal imbalance to the left 5 mm, and sagittal imbalance –5 mm)

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