Treatment of Low-Grade Osteochondral Lesions

Diagnosis and Assessment

The National Comprehensive Cancer Network recommends that low-grade osteochondral lesions be evaluated and graded to determine appropriate treatment, as they can range from benign to malignant 1, 2
Contrast-enhanced MRI is essential for revealing high-grade areas and guiding biopsy location, according to the Annals of Oncology 4
Pain at the site of a cartilaginous lesion may indicate malignancy, though many lesions present as painless masses, as noted by the Annals of Oncology 4
The differentiation between benign lesions and low-grade malignant lesions can be difficult and requires expert assessment, as stated by the Annals of Oncology 4

For resectable low-grade intracompartmental lesions, the National Comprehensive Cancer Network recommends intralesional excision with or without adjuvant therapy 1, 2, 4
For low-grade lesions with larger size or intraarticular/pelvic location, the National Comprehensive Cancer Network recommends wide excision with negative margins 1, 2
For unresectable low-grade lesions, the National Comprehensive Cancer Network recommends radiation therapy, with proton-beam radiotherapy showing excellent local tumor control and long-term survival in patients with low-grade skull base chondrosarcomas 1, 2

For femoral head lesions <2 cm, the American Academy of Orthopaedic Surgeons recommends microfracture as the first-line treatment, and mosaicplasty or osteochondral allograft transplant as the second-line treatment 5, 6
For femoral head lesions 2-6 cm, the American Academy of Orthopaedic Surgeons recommends osteochondral allograft 5, 6
For acetabular lesions <2 cm or 2-6 cm, the American Academy of Orthopaedic Surgeons recommends microfracture as the primary treatment, and suture repair for delaminated chondral flaps with viable cartilage 5

The National Comprehensive Cancer Network recommends post-treatment surveillance to include physical examination, imaging of the lesion, chest radiograph every 6-12 months for 2 years, and functional assessment at every visit 1, 2

The National Comprehensive Cancer Network recommends that local recurrence of low-grade lesions be treated with wide excision if resectable, and radiation therapy after wide excision with positive surgical margins 1
Unresectable recurrences should be treated with radiation therapy, according to the National Comprehensive Cancer Network 1

The National Comprehensive Cancer Network states that histologic grade and tumor location are the most important variables in determining primary treatment 1, 2
Low-grade cartilage tumors are unlikely to metastasize but may recur locally, as noted by the Annals of Oncology 4
The National Comprehensive Cancer Network recommends that chemotherapy is generally not effective for low-grade chondrosarcomas 1, 2