Table 1 Subsets of Lichen myxedematosus and their diagnostic criteria

● Generalized papular and sclerodermoid eruption.

● Mucin deposition, fibroblast proliferation, and fibrosis.

● Monoclonal gammopathy.

● Absence of thyroid disease.

● Papular or nodular plaques.

● Mucin deposition with variable fibroblast proliferation.

● Absence of both: monoclonal gammopathy and thyroid disease.

● Features that mix between the generalized and the localized forms.