Paget's disease is a rare type of cancer that most commonly affects the skin of the nipple and the areola of the breast. However, when considering extramammary Paget's disease (EMPD), it is found on the skin of areas such as the vulva.
Extramammary Paget's disease is significantly associated with vulvar cancer. This type of Paget's disease occurs in the anogenital region and has a strong correlation with an underlying malignancy in the affected area.
Therefore, when examining cases or questions related to Paget's disease and its association with other types of cancers, the vulva is recognized as the correct association.
Therefore, the correct answer to the question "Paget's is associated with which other cancer" is Vulva.