Chondrosarcoma
Chondrosarcoma is a type of bone cancer that originates in cartilage cells, the gristly connective tissue from which most bones develop. It primarily affects the femur, arm, pelvis, or knee, though it can also occur in other areas like the ribs. As the second most common primary bone cancer, chondrosarcoma rarely affects individuals under 20, with risk increasing until age 75. Incidence is equal between males and females.
Characteristics and Behavior
Unlike cancers that spread to bones from other organs, primary bone cancers like chondrosarcoma begin in the bone itself. Chondrosarcoma is characterized by the development of malignant tumors in cartilage cells. These tumors typically grow slowly but can vary in their aggressiveness.
Symptoms
Chondrosarcoma symptoms can vary depending on the tumor’s location. Common signs include a noticeable mass on the bone, pressure sensation around the mass, and increasing pain that’s particularly bothersome at night. This pain typically responds to anti-inflammatory medications like ibuprofen but not necessarily to rest. Additionally, there may be local swelling associated with the tumor.
Causes
The cause of chondrosarcoma is not fully understood, but it may involve genetic or chromosomal factors that increase susceptibility to this type of cancer. Additionally, chondrosarcomas can sometimes develop as a delayed effect of radiation therapy used to treat other cancers.
Risk Factors
Chondrosarcoma often originates from normal cartilage cells or can develop from preexisting benign bone or cartilage tumors. Some benign conditions associated with the development of chondrosarcoma include enchondromas (affecting the hands primarily), multiple exostoses or osteochondromas (multiple growths near growth plate ends), Ollier disease (cluster of enchondromas), and Maffucci syndrome (combination of multiple enchondromas and angiomas).
Treatment Options
Treatment for chondrosarcoma primarily involves surgical removal of the tumor, as this cancer is generally resistant to chemotherapy and radiation therapy. The goal of surgery is complete excision of the tumor with clear margins while preserving as much function as possible. The type and extent of surgery depend on the tumor’s size, location, grade, and whether it has spread. In select cases, such as tumors that cannot be fully removed or are located in challenging areas, radiation therapy may be considered to help control disease. Treatment planning should be individualized and managed by a multidisciplinary team experienced in bone sarcomas to optimize outcomes and long-term function.