<unk>  (MELTUMP) are<unk>  lesions in the dermis that cannot be classified by morphology as either benign naevi (moles) or<unk>  melanomas because the mass shows features of both. Several lesion types may be classified as MELTUMPs: these include atypical<unk>  proliferations with features that may overlap with atypical Spitz naevi/tumors, dysplastic naevi, pigmented epithelioid melanocytoma, deep penetrating naevi, congenital neavi, cellular nodules in congenital naevi, possible naevoid melanomas, and cellular blue naevi. A related category of<unk>  proliferation is superficial atypical<unk>  proliferations of<unk>  significance (SAMPUS). This category, unlike MELTUMP, which implies as yet undetermined<unk>  for metastases even after complete excision, signifies lesions without metastatic<unk>  at time of excision but with<unk>  to progress upon incomplete excision. The SAMPUS category includes certain atypical junctional<unk>  proliferations and proliferations in both the epidermis and papillary dermis that are not accompanied by intradermal<unk> genic architecture or cell mitosis.
Melanocytic tumors of uncertain malignant potential
Eccrine angiomatous hamartoma
Basaloid follicular hamartoma
Littoral cell angioma
Papillary eccrine adenoma
Zosteriform speckled lentiginous nevus
Melanoma with features of a Spitz nevus
Proliferating epidermoid cyst