Unusual Eruptions Associated with Mycoplasma pneumoniae Respiratory Infections: Review of the Literature

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Abstract
Background: Maculopapular or urticarial eruptions and erythema multiforme sometimes occur in patients affected with Mycoplasma pneumoniae respiratory infections. Further eruptions have also been reported. Objective: To review the literature addressing M. pneumoniae respiratory infection and rather unusual eruptions. Methods: Computer-based search in the US National Library of Medicine database as well as in the search engine Google. Results: We found a possible relationship between M. pneumoniae infection and Fuchs' syndrome (n = 37), varicella-like eruptions (n = 8), Henoch-Schönlein syndrome and further leukocytoclastic vasculitides (n = 21) and erythema nodosum (n = 11). A temporal relationship was also observed with 2 cases of Gianotti-Crosti syndrome. Finally, there exists reasonable evidence that pityriasis rosea Gibert and pityriasis lichenoides et varioliformis acuta Mucha-Habermann are not associated with Mycoplasma infections. Conclusion: This review implies that M. pneumoniae may cause, in addition to erythematous maculopapular (or urticarial) eruptions and erythema multiforme, Fuchs' syndrome and varicella-like eruptions. Furthermore, there is an intriguing link with leukocytoclastic vasculitides or erythema nodosum that deserves further investigation.

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