Paget's disease (Intraductal carcinoma)
Early lesion has unilateral, clear, yellow d/c and dry scaling crusts, friable at nipple apex. Speads outward to areola with erythematous halo on aerola and crusted, eczematous, retracted nipple. Later lesion shows nipple reddedned, excoriated, ulcerated, with blood d/c when surface is eroded, and an erythematous plaque surrounding the nipple. symptoms include tingling, burning, itching.