Related Experiment Video
Updated: Jun 13, 2026

Calcification of Vascular Smooth Muscle Cells and Imaging of Aortic Calcification and Inflammation
Published on: May 31, 2016
Legg-Calve-Perthes disease and risks for cardiovascular diseases and blood diseases
Yasmin D Hailer1, Scott M Montgomery, Anders Ekbom
1Uppsala University Hospital, Department of Orthopaedics, SE-75185 Uppsala, Sweden. yasmin.hailer@surgsci.uu.se
Insights
Patients with Legg-Calvé-Perthes disease (LCPD) face increased risks of cardiovascular and blood diseases, including anemia and coagulation defects. These findings support the role of vascular issues in LCPD pathogenesis.
Area of Science:
- Orthopedics
- Cardiology
- Hematology
Background:
- Legg-Calvé-Perthes disease (LCPD) is a childhood hip disorder of unknown etiology.
- Previous research suggests potential links between LCPD and vascular pathologies.
Purpose of the Study:
- To investigate the long-term risks of cardiovascular and blood diseases in patients diagnosed with LCPD.
- To compare these risks with a matched general population cohort and sibling controls.
Main Methods:
- A cohort study utilizing the Swedish Inpatient Register identified 3141 patients with LCPD (ages 2-15).
- A control group of 15,595 individuals without LCPD was randomly selected and matched by birth year, age, gender, and region.
- Cox proportional-hazard regression analyses, adjusted for socioeconomic index, were employed to estimate relative risks, with sibling comparisons also conducted.
Main Results:
- LCPD patients exhibited a 1.70-fold increased risk of cardiovascular diseases (HR: 1.70, 95% CI: 1.39-2.09), with higher risk observed in those over 30 at follow-up (HR: 2.10).
- Significantly elevated risks were found for blood diseases (HR: 1.41, 95% CI: 1.07-1.86), particularly anemias and coagulation defects, which were more pronounced in the >30 age group (HR: 2.70).
- Higher risks of hypertensive disease (HR: 2.97) and nutritional anemia (HR: 2.92) were also noted in LCPD patients. Sibling analyses confirmed cardiovascular findings.
Conclusions:
- The study supports the hypothesis that impaired blood supply to the femoral head, due to vascular pathology, plays a role in the development of LCPD.
- The findings highlight a potential increased lifelong burden of cardiovascular and hematological conditions for individuals with a history of LCPD.
Objective:
We hypothesized that patients with Legg-Calvé-Perthes disease (LCPD) might have higher risks of cardiovascular and blood diseases.
Methods:
A total of 3141 patients, 2 to 15 years of age, with LCPD diagnosed between 1965 and 2005 were identified with the Swedish Inpatient Register. A total of 15 595 individuals without LCPD were selected randomly from among the Swedish general population, with matching according to year of birth, age, gender, and region of residence. Cox proportional-hazard regression analyses, with adjustment for socioeconomic index, were used to estimate relative risks. The patients also were compared with their same-gender siblings.
Results:
Patients with LCPD had a hazard ratio (HR) of 1.70 (95% confidence interval [CI]: 1.39-2.09) for cardiovascular diseases, compared with individuals without LCPD. The point estimate was slightly higher among subjects >30 years of age at the follow-up (HR: 2.10 [95% CI: 1.52-2.91]). There were statistically significantly higher risks for blood diseases, including anemias and coagulation defects (HR: 1.41 [95% CI: 1.07-1.86]), which were more pronounced among subjects >30 years of age at the follow-up (HR: 2.70 [95% CI: 1.50-4.84]). Patients also had statistically significantly higher risks of hypertensive disease (HR: 2.97 [95% CI: 1.87-4.72]) and nutritional anemia (HR: 2.92 [95% CI: 1.58-5.40]). Analyses using siblings as the comparison group showed consistent results for cardiovascular diseases.
Conclusion:
The results are consistent with the hypothesis that an insufficient blood supply to the femoral head, attributable to vascular pathologic conditions, is involved in the pathogenesis of LCPD.
Related Concept Videos
Cardiovascular System Abnormal Findings I: Inspection and Palpation
Abnormal findings observed during an inspection
Imaging Studies for Cardiovascular System III: X-Ray
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
Assessment of the Cardiovascular System III: Palpation
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above the...
Cardiomyopathy V: Interprofessional Care
Rheumatic Heart Disease I: Introduction
Cardiomyopathy III: Hypertrophic Cardiomyopathy
