Skip to main content

Table 3 Medical history of symptomatic spinal stenosis (SSS) in adults with achondroplasia (n = 34)

From: High prevalence of symptomatic spinal stenosis in Norwegian adults with achondroplasia: a population-based study

Age at symptom onset (years) Affected spine level based on imaging reports Narrowest AP spinal canal diameter (mm) a Total number of surgeries Age at first surgery (years) Time from symptom onset to first surgery (years)
10 T12-L2, L3-S1   2 10 0.3 b
11 T12-L3   2 14 3
12 T11–12, L1-S1   1 22 10
12 T10–12, L2-S1   3 30 18
13 C3–7, T9–11, L1–5   1 25 12
13 C4–5, L1–5   2 17 4
14 L3–5   1 41 27
14 L1–3 L2–3: 7.9 0   
16 L2–4   1 30 14
16 L3–4 L3–4: 7.7 0   
17 T1–12, L1-S1   2 18 1
21 C3–4, L1–4   1 25 4
25 L1-S1   1 60 35
26 C4–5, L2-S1   1 28 2
26 T10–11, L2-S1   3 26 0.4 c
27 T7–11 T7–8: 3.8 0   
29 C3–4, T8–12, L2–5   1 47 18
30 L3–4 L3–4: 8.0 0   
30 T12-L2   1 62 32
32 C4–6, L3–4   2 48 16
33 L2–5   1 45 12
34 T10-T12, L3–4   2 35 1
35 C4–7, L1–5   3 36 1
35 T8–11, L1–5   4 36 1
39 L3–5   1 46 7
41 T10–12, L1-S1   3 43 2
42 L2–4   1 44 2
43 C6-T1, T9–10, L3–5   1 63 20
43 L2–5   1 45 2
45 L2–5   1 53 8
46 C2, C4–5, C6–7, L1–3 L1–2: 5.9 0   
57 C3–4, L4–5 L1–2: 8.8 0   
60 C1-T1, L1–5   2 63 3
67 C3–5, L1–2   1 70 3
  1. Abbreviations: C: Cervical, T: Thoracic, L: Lumbar
  2. a Narrowest anteroposterior (AP) spinal canal diameter assessed on sagittal MRI in non-operated individuals (n = 6) with SSS
  3. b 4 months
  4. c 5 months