Reticular erythematous mucinosis (REM) is rare form of cutaneous mucinosis. It most often affects middle-aged women. It is also called ‘midline mucinosis’ or ‘plaque-like cutaneous mucinosis’. Papules (small bumps) develop on the mid-back or chest and form a net-like pattern (hence the name, ‘reticular’).
The cause is unknown. However, exposure to sunlight may contribute to the condition. Generally, REM is not associated with other systemic diseases but it can appear very similar to mucinosis developing in association with systemic lupus erythematosus.
Diagnosis is made by skin biopsy, which shows typical mucinous deposits between bundles of collagen in the deeper layer of the skin, the dermis.
REM usually responds well to treatment:
