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Topic:

Osteochondroma

Issue:

​

Category:

Oncology

Title:

Effect of Solitary Osteochondroma on Alignment and Length in the Lower Extremities

Author:

Park, Hoon MD, PhD; Kim, Hyun Woo MD, PhD; Park, Kun-Bo MD, PhD; Kim, Jae Hong MD; Chang, Won June MD; Park, Byoung Kyu MD, PhD

Journal:

Journal of Pediatric Orthopaedics

Date:

April 2024

Reference:

44(4):p e351-e356, DOI: 10.1097/BPO.0000000000002612

Level Of Evidence:

III

# of Patients:

111

Study Type:

Retrospective comparative study

Location:

Single-center

Summary:

This study evaluated the impact of untreated solitary osteochondromas (SO) around the knee on coronal alignment and leg length in children and adolescents. Differences between affected and unaffected limbs were analyzed, focusing on mechanical angles and limb length discrepancies (LLD).

Methods:

Retrospective analysis of clinical and radiographic data. SO characteristics, such as location, type, size, and proximity to the joint line, were recorded. Radiographic evaluation included measurements of mechanical lateral distal femoral angle, medial proximal tibial angle, whole-leg length, femoral length, and tibial length. Statistical comparisons between affected and contralateral limbs were performed.

Exclusions:

Not specified

Results:

SOs around the knee did not result in significant coronal deformities. In patients with femoral lesions, the affected limb was shorter by a mean of 2.1 mm compared to the unaffected limb (P<0.001). No significant length discrepancies were found in tibial lesions. No specific factors were identified as predictors for limb length discrepancy in the univariate analysis.

Conclusions:

SOs around the knee generally do not cause clinically significant deformities or LLD. SOs in the distal femur, however, may result in minor limb shortening, which should be monitored in skeletally immature children. Tibial lesions were not associated with significant LLD.

Relevance:

Limitations:

Perspective:

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