Differential Diagnosis for a Round Nodule in the Breast that is Non-Mobile
- Single Most Likely Diagnosis
- Fibroadenoma: This is a common benign breast tumor, especially in younger women. They are often round, firm, and non-mobile, which matches the description provided.
- Other Likely Diagnoses
- Cyst: Breast cysts are fluid-filled sacs within the breast and can present as round nodules. They are usually mobile but can be non-mobile if they are large or if there is surrounding inflammation.
- Lipoma: A benign tumor composed of fat tissue, which can feel like a round nodule in the breast. Lipomas are generally mobile, but their mobility can be limited by their size or location.
- Hamartoma: A benign breast tumor that is a mix of glandular, fibrous, and fatty tissues. It can present as a round, non-mobile mass.
- Do Not Miss Diagnoses
- Breast Cancer (e.g., Invasive Ductal Carcinoma): Although less likely than benign conditions, breast cancer must always be considered, especially if the nodule is non-mobile and hard. Early detection is crucial for treatment and prognosis.
- Phyllodes Tumor: These are rare tumors that can be benign, borderline, or malignant. They can grow quickly and may present as a large, non-mobile mass.
- Rare Diagnoses
- Pseudoangiomatous Stromal Hyperplasia (PASH): A rare benign condition that can mimic breast cancer on imaging. It can present as a non-mobile mass.
- Granular Cell Tumor: A rare tumor that can occur in the breast, usually presenting as a firm, non-mobile mass.
- Metastasis to the Breast: Although rare, metastases from other cancers (like lymphoma, melanoma, or ovarian cancer) can present as round, non-mobile nodules in the breast.
Each diagnosis has a brief justification based on the characteristics of the breast nodule described (round and non-mobile) and the typical presentations of these conditions. The categorization helps in prioritizing the most likely and critical diagnoses for further investigation and management.