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Thigh mass - Large Biopsy 3-6 cm
Biopsy
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Biopsy of thigh tumor/mass.
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Thigh Mass - Large Biopsy 3-6 cm
- Why is it done?
- To obtain tissue diagnosis of a thigh mass measuring 3-6 cm that requires histopathological examination
- To differentiate between benign and malignant soft tissue lesions of the thigh
- To identify the specific tumor type and grade when malignancy is suspected
- When imaging studies (ultrasound, MRI, or CT) show an indeterminate lesion requiring tissue confirmation
- To guide treatment planning and prognostic assessment for confirmed soft tissue neoplasms
- When clinical examination reveals a persistent, enlarging, or symptomatic mass in the thigh
- Normal Range
- Negative/Normal Result: Benign tissue histology with no evidence of malignancy, abnormal cellular proliferation, or infectious/inflammatory pathology
- Positive/Abnormal Result: Histological findings consistent with malignancy, specific tumor classification, or significant pathological abnormalities
- Tissue Categories: Specimen adequacy is assessed; adequate tissue is required for accurate diagnosis
- Reporting Units: Descriptive histopathological diagnosis with tumor grade (for sarcomas: Grade 1-3), stage, and immunohistochemical findings when applicable
- Interpretation
- Benign Findings: Lipoma, hemangioma, neurofibroma, or other non-malignant soft tissue tumor; typically requires no urgent intervention but may need monitoring or surgical removal for symptomatic relief
- Low-Grade Malignancy: Grade 1 soft tissue sarcoma or low-grade lymphoma; slower growth rate with better prognosis; requires surgical resection and may need adjuvant therapy
- Intermediate-Grade Malignancy: Grade 2 sarcoma with moderate cellularity and mitotic activity; requires aggressive surgical management and likely adjuvant chemotherapy and/or radiation
- High-Grade Malignancy: Grade 3 sarcoma with significant cellular atypia, high mitotic rate, and necrosis; aggressive tumor requiring multimodal therapy (surgery, chemotherapy, radiation) and close follow-up
- Specific Tumor Types: Liposarcoma, leiomyosarcoma, fibrosarcoma, synovial sarcoma, rhabdomyosarcoma, or other defined entities require specific staging and treatment protocols
- Specimen Adequacy Issues: Insufficient tissue may require repeat biopsy; necrotic material without representative tumor may yield non-diagnostic results
- Molecular/Genetic Findings: Presence of specific translocations (t(9;22) in synovial sarcoma, t(11;22) in Ewing sarcoma) supports diagnosis and may have prognostic significance
- Associated Organs
- Primary Organ System: Musculoskeletal system (soft tissue of the thigh, including muscle, fat, connective tissue, and associated structures)
- Associated Soft Tissue Sarcomas: Liposarcoma (most common), leiomyosarcoma, fibrosarcoma, synovial sarcoma, rhabdomyosarcoma, angiosarcoma, and malignant peripheral nerve sheath tumors
- Associated Benign Conditions: Lipomas, hemangiomas, neurofibromas, ganglion cysts, and lymphoid hyperplasia
- Potential Metastatic Sites: Lungs (most common), liver, bone, lymph nodes, and brain for malignant thigh masses
- Regional Lymph Node Involvement: Inguinal lymph nodes may be involved in high-grade malignancies; assessment required for staging
- Vascular and Neurological Complications: Large masses may compress femoral vessels or sciatic/femoral nerves, causing vascular compromise or neurological deficit
- Follow-up Tests
- Staging Imaging: Chest CT, abdominal/pelvic CT, or PET-CT to detect metastatic disease in patients with malignancy
- Advanced MRI: High-resolution MRI of thigh with contrast for better definition of tumor margins and relationship to surrounding structures prior to surgical resection
- Immunohistochemistry (IHC) and Molecular Studies: Cytogenetic analysis and FISH studies for specific translocations to confirm tumor type and refine diagnosis
- Surgical Consultation: Orthopedic surgery or surgical oncology evaluation for treatment planning and wide local excision
- Oncology Consultation: Medical oncology for chemotherapy, radiation therapy, and systemic treatment planning in malignant cases
- Serial Imaging Follow-up: Repeat MRI at 3-4 months post-diagnosis, then every 6-12 months for surveillance of recurrent disease
- Baseline Cardiac Function: Echocardiography or MUGA scan if chemotherapy (especially anthracyclines) is anticipated
- Pulmonary Function Testing: Baseline assessment if radiation therapy to the thigh is planned
- Repeat Biopsy: If initial biopsy specimen is inadequate, non-diagnostic, or if clinical suspicion remains high
- Fasting Required?
- Fasting: No fasting required
- Anesthesia Consideration: If local anesthesia is used, standard pre-procedural preparations apply; if general anesthesia is planned, NPO (nothing by mouth) for 6-8 hours prior to procedure
- Medications: Discontinue anticoagulants (warfarin, NOACs) 3-5 days before procedure; discontinue antiplatelet agents (aspirin, clopidogrel) 5-7 days prior if possible; discuss with physician regarding continuation of essential medications
- Pre-Procedure Preparation: Arrange for procedural imaging (ultrasound or CT guidance); wear comfortable, loose-fitting clothing; arrange transportation if sedation is anticipated
- Baseline Laboratory Tests: Complete blood count (CBC), coagulation profile (PT/INR, PTT) to assess hemostasis prior to tissue sampling
- Post-Procedure Care: Keep biopsy site clean and dry; apply pressure dressing for 24-48 hours; avoid strenuous activity for 1 week; monitor for infection, excessive bleeding, or hematoma formation
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