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Fibroadenoma - Large Biopsy 3-6 cm
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Fibroadenoma - Large Biopsy 3-6 cm
- Why is it done?
- To obtain a definitive tissue diagnosis of a large breast fibroadenoma (3-6 cm) that has been identified on imaging studies such as ultrasound or mammography
- To confirm benign nature of the lesion and rule out malignancy, phyllodes tumor, or other breast pathology
- To assess for complex features within the fibroadenoma that may require surgical intervention or closer monitoring
- Typically performed when imaging characteristics are ambiguous or when the lesion is enlarging and requires pathological evaluation
- Performed in women of reproductive age presenting with a palpable breast mass or incidentally discovered lesion on imaging
- Large biopsy technique (3-6 cm core or excisional) is preferred over smaller biopsies due to lesion size and need for complete histological evaluation
- Normal Range
- Histopathological Result: Benign fibroadenoma
- Positive Interpretation: Microscopic findings show characteristic fibroadenoma histology with well-circumscribed lesion composed of epithelial and stromal components, no evidence of malignancy
- Negative Result (Abnormal): Any finding indicating malignancy, phyllodes tumor, complex features, or atypia requiring further intervention
- Size Measurement: Fibroadenoma specimen typically measures 3-6 cm in greatest dimension, correlating with imaging findings
- Units: Millimeters (mm) for microscopic measurements; centimeters (cm) for gross specimen dimensions
- Normal findings equate to benign diagnosis allowing conservative management with clinical follow-up; abnormal findings may necessitate surgical excision or additional imaging
- Interpretation
- Benign Fibroadenoma (Expected Finding):
- Well-defined, non-encapsulated or partially encapsulated lesion
- Mixture of epithelial and stromal (fibroblastic) components
- Absence of nuclear atypia or mitotic activity
- Indicates benign disease with excellent prognosis
- Complex Fibroadenoma:
- Presence of cysts, sclerosing adenosis, papillomas, or hyperplasia within fibroadenoma
- Still benign but may warrant closer follow-up or excision
- Phyllodes Tumor:
- Increased stromal cellularity, increased mitoses, stromal overgrowth
- Classified as benign, borderline, or malignant based on histological features
- Requires wider surgical margins or mastectomy depending on grade
- Atypical Findings:
- Nuclear atypia, increased mitotic figures, or other worrisome features
- May suggest malignancy or high-risk lesion requiring immediate surgical consultation and possible excision
- Factors Affecting Interpretation:
- Adequacy of tissue sampling (large biopsy reduces sampling error)
- Tissue fixation and processing quality
- Pathologist expertise in breast pathology
- Concordance with imaging findings
- Benign Fibroadenoma (Expected Finding):
- Associated Organs
- Primary Organ System:
- Breast tissue - specifically evaluating lesions in the mammary gland
- Integumentary system as the breast is a modified sweat gland
- Diseases/Conditions Associated with Abnormal Results:
- Invasive ductal carcinoma
- Invasive lobular carcinoma
- Malignant phyllodes tumor
- Atypical hyperplasia
- Breast lymphoma
- Sarcoma of breast tissue
- Potential Complications Associated with Abnormal Results:
- If malignancy diagnosed: metastatic disease, need for chemotherapy/radiation, possible mastectomy
- If phyllodes tumor diagnosed: risk of recurrence, potential need for wider excision or mastectomy
- If atypical hyperplasia identified: significantly increased lifetime breast cancer risk requiring surveillance
- Primary Organ System:
- Follow-up Tests
- If Benign Fibroadenoma Confirmed:
- Clinical breast examination every 6-12 months for first 2 years
- Mammography or ultrasound in 6 months to assess for interval change
- Annual imaging thereafter if stable
- If Complex Fibroadenoma:
- Ultrasound or MRI in 3 months to assess features
- Consider surgical excision if rapid growth or patient anxiety
- More frequent imaging (every 3-6 months) compared to simple fibroadenoma
- If Phyllodes Tumor Identified:
- Immediate surgical oncology consultation
- Wide surgical excision with adequate margins (1-2 cm) based on grade
- MRI or CT imaging to assess for metastatic disease
- Close follow-up imaging and clinical examination every 3-6 months for 2 years, then annually
- If Malignancy Identified:
- Urgent surgical oncology consultation and multidisciplinary tumor board review
- Staging studies: CT chest/abdomen/pelvis, bone scan, or PET-CT
- Immunohistochemistry (ER, PR, HER2) and genetic testing if appropriate
- Surgical resection, chemotherapy, radiation, and/or hormonal therapy as determined by oncology team
- If Atypical Features Present:
- Surgical excision recommended
- Risk assessment for breast cancer development
- Enhanced surveillance mammography every 6-12 months
- Consider risk reduction strategies (tamoxifen) in select cases
- If Benign Fibroadenoma Confirmed:
- Fasting Required?
- Answer: No
- Fasting is not required for a breast fibroadenoma biopsy as this is a tissue sampling procedure, not a laboratory blood test
- Medications:
- Discontinue aspirin, NSAIDs, and anticoagulants (warfarin, DOACs) 3-5 days prior to procedure if possible to minimize bleeding risk
- Consult with interventional radiologist or surgeon regarding specific anticoagulation management if patient is on warfarin or other anticoagulants
- Continue all other routine medications unless otherwise instructed
- Patient Preparation:
- Wear comfortable, easily removable clothing with front-opening top
- Avoid applying deodorant, lotions, or powders to breast area on day of procedure
- Perform procedure during follicular phase of menstrual cycle if possible (less breast tenderness)
- Arrange for transportation as sedation may be used and driving is not recommended immediately after procedure
- Wear supportive bra on day of procedure; bring it with you if performing excisional biopsy
- Bring photo ID and insurance information
- Arrive 15 minutes early for check-in
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