Mammography – Single Breast

Mammography – Single Breast (Unilateral Mammogram) Detailed Overview

A single-breast mammography (unilateral mammogram) is a specialized X-ray examination of one breast, used to detect breast cancer, benign tumors, cysts, or other abnormalities. It is usually performed when a patient has symptoms in one breast, such as a lump, pain, nipple discharge, or following surgery in one breast.

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1. Indications (Why It’s Done?)

✅ Suspicious Lump or Mass – To assess solid vs. cystic nature
✅ Nipple Changes – Retraction, discharge, or skin dimpling
✅ Breast Pain (Unilateral) – To check for underlying pathology
✅ Follow-up of Previous Findings – For monitoring abnormal areas
✅ Post-Surgical or Post-Treatment Evaluation – Checking for recurrence
✅ Screening in High-Risk Patients – BRCA mutation carriers, strong family history

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2. Procedure & Technique

Patient Preparation

🔹 Avoid deodorant, powders, or lotions on the chest and underarms (to prevent artifacts)
🔹 Wear a two-piece outfit for easy undressing
🔹 Inform the technician about pregnancy, breastfeeding, or previous breast surgeries
🔹 Schedule after menstruation (if premenopausal) to reduce discomfort

Imaging Views

A single-breast mammogram includes at least two standard views:
1️⃣ Craniocaudal (CC) View – Top-to-bottom view of the breast
2️⃣ Mediolateral Oblique (MLO) View – Side-angle view to include the axillary region

🔹 Additional views (spot compression, magnification, or lateral views) may be done if needed

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3. Mammogram Findings & Interpretation

✅ Normal Findings

• Uniform breast tissue with no suspicious masses or calcifications

• Well-defined normal fatty and glandular tissue

✅ Common Abnormalities

• Benign Masses (Non-Cancerous)
  🔹 Cysts (well-circumscribed, round, fluid-filled)
  🔹 Fibroadenomas (smooth, oval, mobile tumors)
  🔹 Fat necrosis (benign post-trauma changes)

• Suspicious Findings (Need Further Evaluation)
  🔹 Irregular Mass – Poorly defined edges, spiculated borders
  🔹 Microcalcifications – Clustered or irregular tiny calcium deposits
  🔹 Asymmetry or Architectural Distortion – Possible early malignancy
  🔹 Skin or Nipple Retraction – May indicate underlying cancer

✅ BIRADS Classification (Breast Imaging Reporting and Data System)

Mammogram results are categorized into BIRADS (Breast Imaging-Reporting and Data System):
📌 BIRADS 0 – Incomplete; additional imaging needed
📌 BIRADS 1 – Normal
📌 BIRADS 2 – Benign findings (e.g., cysts, fibroadenomas)
📌 BIRADS 3 – Probably benign; short-term follow-up needed
📌 BIRADS 4 – Suspicious; biopsy recommended
📌 BIRADS 5 – Highly suggestive of malignancy; biopsy necessary
📌 BIRADS 6 – Known biopsy-proven malignancy

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4. Advantages of Mammography

✔ Early cancer detection – Detects abnormalities before symptoms appear
✔ Quick & relatively low radiation exposure
✔ Effective for microcalcifications and mass detection
✔ Good for post-surgical monitoring in one breast

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5. Limitations & Considerations

❌ Limited in dense breasts (additional ultrasound or MRI may be needed)
❌ Discomfort during compression
❌ False positives & false negatives possible
❌ Not suitable for pregnant or breastfeeding women (unless necessary)

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Next Steps After a Single-Breast Mammogram

• Normal Findings – Routine screening or follow-up as advised

• Suspicious Findings – Additional imaging (ultrasound, MRI) or biopsy may be required

• Definitive Diagnosis Needed? – Core needle biopsy or fine-needle aspiration (FNA) may be performed