The term pagetoid (i.e., 'Paget-like') is derived from the extramammary Paget's disease, wherein the large tumour cells are arranged singly or in small clusters within the epidermis and its appendages. These cells are distinguished by a clear halo from the surrounding epithelial cells and a finely granular cytoplasm.
The term "pagetoid" (meaning "Paget-like") originates from extramammary Paget's disease, where large tumor cells are found in clusters or singly within the epidermis and its appendages. These cells have a distinct halo around them compared to surrounding epithelial cells and contain finely granular cytoplasm.