 A related category of melanocytic proliferation is "superficial atypical melanocytic proliferations of uncertain significance" (SAMPUS).This category, unlike MELTUMP, which implies as yet undetermined potential for metastases even after complete excision, signifies lesions without metastatic potential at time of excision but with potential to progress upon incomplete excision.The SAMPUS category includes certain atypical junctional melanocytic proliferations and proliferations in both the epidermis and papillary dermis that are not accompanied by intradermal tumorigenic architecture or cell mitosis.