Skin and subcutaneous (L00-L99).
- Dermatoses (skin diseases) with clear cells.
- Clear cell acanthoma of the nipple (breast).
- Pagetoid dyskeratosis
- Hyperkeratosis (excessive severe keratinization) of the nipple.
- Acanthosis nigricans – skin disease characterized by planar hyperpigmentation and hyperkeratosis.
- Nevoid hyperkeratosis
- Pregnancy-associated hyperkeratosis
- Nipple eczema (eczema of the nipple).
- Allergic contact dermatitis – skin change triggered by skin contact with certain substances.
- Atopic dermatitis (neurodermatitis).
- Irritant contact dermatitis – skin inflammation caused by either irritant/toxic effects or allergies.
Neoplasms – tumor diseases (C00-D48).
- Other forms of breast carcinoma (breast cancer).
- Malignant melanoma of the nipple