Differential Diagnosis for Palpable Abnormality and Pain in the Left Breast
The following differential diagnosis is based on the provided mammography and ultrasound findings.
- Single Most Likely Diagnosis
- Intradermal Sebaceous Cyst: This is the most likely diagnosis given the ultrasound findings of a 0.5 cm intradermal sebaceous cyst correlating with the palpable lump in the left breast.
- Other Likely Diagnoses
- Fibrocystic Changes: The patient's symptoms of a palpable abnormality and pain, combined with the mammography findings of scattered areas of fibroglandular density, could also suggest fibrocystic changes.
- Breast Cyst: Although not specifically identified on ultrasound, a breast cyst could also present as a palpable lump and cause breast pain.
- Do Not Miss Diagnoses
- Breast Cancer: Although the mammography and ultrasound findings do not suggest malignancy, breast cancer must be considered in the differential diagnosis, especially given the patient's Tyrer-Cuzick lifetime risk of 7.8%.
- Inflammatory Breast Cancer: This rare and aggressive form of breast cancer can present with skin changes, pain, and a palpable abnormality, making it a crucial diagnosis not to miss.
- Rare Diagnoses
- Lipoma: A benign tumor made up of fat tissue, which could present as a palpable lump in the breast.
- Hamartoma: A rare, benign breast tumor that could cause a palpable abnormality and breast pain.
- Phyllodes Tumor: A rare breast tumor that can be benign, borderline, or malignant, and may present as a palpable lump.