Surgical methods: from curettage to resection
Surgical intervention is the basic approach to managing patients with musculoskeletal system neoplasms. The choice of a specific technique is determined by multiple factors: the location of the lesion, its aggressiveness and size, as well as the functional demands and age of the patient.
Among the main surgical options are:
- Curettage (curettage). This involves scraping pathological tissues from the bone cavity. The method is indicated for benign processes and certain low-grade tumors (low-grade). Bone cement or a bone graft (bone graft) is placed into the defect formed after removal. To prevent local recurrences, the frequency of which is quite high with curettage, adjuvant therapy is used: cryotherapy, phenolization, or high-speed burring (high-speed burring). If the bone is severely damaged, internal fixation is performed to maintain its integrity. The main advantage of the method is the preservation of function, especially near joints.
- Resection (resection). Used for aggressive bone and soft tissue neoplasms. It involves excising the tumor along with a layer of healthy tissues. The extent of the structures removed depends directly on the characteristics of the pathological lesion (size, location, grade degree).
- En bloc resection (en bloc resection). A special surgical technique in which the affected area is removed entirely, intact, rather than in parts (piecemeal). This minimizes the risk of leaving residual cells and prevents the spread of the process to adjacent tissues. The procedure is characterized by increased invasiveness, as surrounding muscles, nerves, and blood vessels may be included in the block, and it requires high surgical skill, but it reliably reduces the risk of local recurrence in high-grade tumors.
Limb-sparing surgery (Limb-sparing surgery)
In modern musculoskeletal oncology, priority is always given to limb preservation whenever possible. Such interventions are indicated for localized processes without distant metastasis. The goal of limb-sparing surgery is not only to remove the tumor but also to ensure a high quality of life for the patient while maintaining mobility.
The most critical oncological indicator—disease-free survival (disease-free survival)—after a properly performed resection is completely comparable to the results of amputation.
The intervention usually takes place in three stages:
- Direct resection of the affected area (e.g., marginal en bloc resection).
- Reconstruction of the defect using massive bone grafts, metal implants, or hinged endoprostheses.
- Soft tissue plasty to close the defect.
To decide in favor of limb preservation, the type and stage of the tumor, its location, the patient's general health, and potential functional outcomes are evaluated. Long-term physical therapy and rehabilitation are mandatory after surgery to restore range of motion.
Prophylactic internal fixation
A particular challenge in traumatology is the involvement of long tubular bones against the background of a progressive metastatic process. In such cases, the risk of pathological fractures increases manifold.
To prevent severe consequences and reduce their frequency, prophylactic fixation (prophylactic internal fixation) is used. There are clear predictors indicating a high risk of fracture:
- Pronounced tumor destruction of the cortical bone layer.
- Presence of severe pain syndrome associated with physical exertion.
- Exact location of the lesion in areas with high biomechanical load. For example, involvement of the calcar region (calcar region) of the proximal femur, which bears weight during walking, most often requires prophylactic surgical treatment.
Radiation therapy (Radiation therapy)
In addition to surgery, radiation exposure is used. Radiation therapy can act as an independent non-surgical method or be used in combination with surgery or chemotherapy.
The mechanism of action consists of the targeted damage to the DNA of highly active cancer cells with less impact on surrounding healthy tissues. This prevents division and metastasis. Delivery of rays can be external (using a linear accelerator) and internal (implantation of a radioactive source directly into the tumor area.
Osteology specifics: Bone tissue has high resistance to radiation. To achieve the death of tumor cells inside the bone, higher radiation doses are required than for soft tissues. This significantly increases the risk of specific complications:
- Radiation osteonecrosis (osteoradionecrosis).
- Pathological fractures.
To minimize risks, radiation oncologists and medical physicists carefully plan the treatment schedule, applying fractionation—dividing the dose into a series of daily sessions. This gives healthy tissues time to recover. Common side effects include skin irritation, local damage to normal tissues, and increased fatigue (fatigue).
Briefly: answers to topical questions
Which nosological forms belong to the group of tumor-like bone diseases?
The group of tumor-like bone diseases includes the following nosological forms:
- Simple juvenile bone cyst (Simple juvenile bone cyst) — a benign lesion often presenting with a pathological fracture.
- Aneurysmal bone cyst (Aneurysmal bone cyst, ABC) — an intermediate locally aggressive lesion.
- Fibrous cortical defect (Fibrous cortical defect) — belongs to tumors of fibrous tissue.
- Fibrous dysplasia of bone (Fibrous bone dysplasia, FBD) — Jaffe-Lichtenstein disease.
- Osteofibrous dysplasia (Osteofibrous bone dysplasia, OBD) — Campanacci disease, Kempson disease.
- Eosinophilic granuloma (Eosinophilic granuloma) — Langerhans cell histiocytosis.
What are the characteristic radiological signs of fibrous dysplasia of bone?
Characteristic radiological signs of fibrous dysplasia of bone include a geographic lesion pattern with possible expansion and deformation.
- Matrix mineralization (ground-glass matrix) — diffuse ground-glass appearance mineralization.
- Lesion margins ('rind' sign) — thick sclerotic margin, or the 'rind' sign.
- Lytic lesions — purely lytic lesions may occur, indicating extensive cystic degeneration.
- Bone deformation ('shepherd’s crook' deformity) — varus deformity of the proximal femur resembling a shepherd's crook.
Periosteal reaction is not characteristic of this disease, and the metadiaphyseal zone is typically affected in long tubular bones.
In which cases is limb amputation indicated for malignant bone neoplasms?
Malignant neoplasms are absolute indications for limb amputation. Limb-sparing surgery is preferred whenever possible. The choice between limb-sparing surgery and amputation depends on the type and stage of the tumor, its location, the patient's age and general condition, as well as the potential for preserving limb functionality. With a properly performed limb-sparing surgery, disease-free survival is identical to that after amputation.
Class and exam questions
Does the choice between amputation and limb-salvage surgery affect patient survival?
No, if limb-sparing surgery is performed with high quality, disease-free survival remains the same as with amputation.
What is the purpose of adjuvant therapy during curettage?
Adjuvant therapy (cryotherapy, phenolization, high-speed burring) is necessary to eradicate all remaining neoplastic cells and reduce the risk of local recurrence.
Why are bone tumors more difficult to treat with radiation therapy than soft tissue tumors?
Bone tissue is more resistant to radiation (radioresistant). Destroying a bone tumor requires higher radiation doses, which increases the risk of radiation osteonecrosis and fractures.
What else to study on this topic
- Criteria for choosing between amputation and limb-salvage surgery
- Types of adjuvant local therapy during curettage
- Predictors of impending pathological fracture in long tubular bones
- Specific complications of radiotherapy for bone tumors
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