Signs and symptoms are quite variable, and may not be present at all in "occult"<unk> . Rapid onset of symptoms is typical; the breast often looks swollen and red, or "inflamed", sometimes seemingly changing overnight.<unk>  is frequently misdiagnosed as mastitis. Invasion of the local lymphatic ducts, the hallmark sign of<unk> , impairs lymphatic drainage and causes edematous swelling of the breast. Because the skin of the breast is tethered by the suspensory ligament of Cooper, the accumulation of fluid within the lymphatic system of the skin may cause the breast skin to assume a dimpled appearance similar to an orange peel (peau d'orange). A palpable tumor is not always found as it would be in other forms of breast cancer. Symptoms may include: *Sudden swelling of the breast *Skin changes on breast *Reddened area with a texture resembling the peel of an orange (peau d'orange) *Nipple retraction (flattened look) or discharge *Pain in the breast *Itching of breast *Swelling of lymph nodes under the arm or in the neck *Unusual warmth of the affected breast *Breast is harder or firmer Other symptoms may rarely include: *Swelling of the arm *Breast size may seem to decrease instead of increasing *Although a dominant mass is present in many cases, most<unk>  cancers present as diffuse infiltration of the breast without a well-defined tumor. *A lump may be present and grow rapidly Most patients do not experience every known symptom of<unk> . Not all symptoms need to be present to make an<unk>  diagnosis.
Inflammatory breast cancer
Benign proliferative breast disease
Pre-cancer of the breast
Medullary breast carcinoma
Paget's disease of the breast
Breast eczema
Mucinous carcinoma of the breast
Hereditary lobular breast cancer