Study Design: A systematic review.Purpose: This study aimed to evaluate the prevalence of coexisting lumbar spondylosis (LS) and knee osteoarthritis (KOA), which has clinical implications on the screening, diagnosis, and management of orthopedic patients.Overview of Literature: Due to current global health trends, the number of affected patients is expected to increase substantially. However, no prior systematic reviews have discussed this topic.Methods: A systematic literature search was conducted in June 2021 in the PubMed, Embase, Scopus, CINAHL, and Cochrane CENTRAL databases. Clinical and epidemiological studies that reported quantitative data on the prevalence of coexisting LS and KOA were included. Studies which reported data on only LS or KOA alone were excluded. Odds ratios (ORs) and 95% confidence intervals (CI) for LS or KOA were retrieved or calculated for meta-analysis. Fixed-effects and random-effects models were used, and statistical significance was considered when <i>p</i><0.05. Heterogeneity was evaluated using Cochran’s Q test and the <i>I²</i> statistic. Risk of bias was assessed using the MINORs (methodological index for nonrandomized studies) criteria.Results: This review included nine studies (5,758 patients). Four studies (4,164 patients) defined KOA and LS by a Kellgren-Lawrence (KL) grade of ≥2 and were included in the meta-analysis. Two other studies defined KOA and LS by a joint space narrowing grade of ≥2. The remaining three studies reported other outcomes. The combined ORs of having KOA of KL grade ≥2 due to LS was 1.75 (95% CI, 1.22–2.50; <i>p</i>=0.002), while the combined OR of having LS of KL grade ≥2 due to KOA was 1.84 (95% CI, 1.23–2.77; <i>p</i>=0.003).Conclusions: In patients with either KOA or LS, the odds of having a concurrent knee-spine presentation are significantly increased. This may have implications for clinical decision-making and treatment strategies. Further high-level studies with larger patient populations are required to confirm these results in specific populations.

Background: Patients with ankylosing spondylitis (AS) are especially prone to sustaining spinal fractures. A 72-year-old male with AS had a previous T10/11 chalkstick fracture requiring a T8-L1 fusion 1 year ago. He subsequently presented with a newly diagnosed acute chalkstick fracture of L1 which was treated without surgery. Case Description: A 72-year-old male with AS and a T10/11 chalkstick fracture had undergone a T8-L1 thoracolumbar fusion 1 year ago. He newly presented after a fall from his bed with a new acute L1 chalkstick fracture that was successfully managed nonsurgically. Conclusion: Patients with AS are at high risk for spinal fractures. Here, elderly male, following an original T10/11 chalkstick fracture and a T8-L1 fusion 1 year ago, presented with a new acute L1 chalkstick fracture managed without surgery.