Differential Diagnosis for Yeast Under Breast
- Single most likely diagnosis
- Intertrigo with candidal infection: This is the most likely diagnosis due to the warm, moist environment under the breast, which is a common site for fungal infections, particularly candidiasis. The presence of yeast suggests a fungal etiology, and intertrigo is a type of skin inflammation caused by friction and moisture, often complicated by fungal or bacterial infections.
- Other Likely diagnoses
- Eczema (atopic dermatitis): Could be considered if the rash is itchy and there's a history of atopic diseases. However, the presence of yeast points more towards a fungal infection.
- Contact dermatitis: An allergic or irritant reaction could occur under the breast, especially if there's been exposure to new soaps, detergents, or other products. But again, yeast suggests a fungal component.
- Folliculitis: An infection of the hair follicles, which could be bacterial or fungal. The presence of yeast might suggest a fungal folliculitis, but this is less common under the breast compared to intertrigo.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Inflammatory breast cancer: Although extremely rare and unlikely, any new onset of breast skin changes should prompt consideration of inflammatory breast cancer, especially if there's rapid progression or other systemic symptoms.
- Cellulitis: A bacterial infection of the skin and subcutaneous tissues that can spread rapidly and become serious. While yeast is mentioned, a bacterial component could be present, especially if there's significant redness, swelling, or systemic symptoms.
- Rare diagnoses
- Tinea corporis (ringworm): A fungal infection that can occur anywhere on the body, including under the breast, but it's less common in this location compared to other areas.
- Pityriasis versicolor: A skin condition caused by a yeast infection, characterized by patches of discoloration on the skin. It's more common on the trunk but could potentially occur under the breast.