Three cases of bullous morphea: histopathologic findings with implications regarding pathogenesis.

Bullous morphea is a rare variant and is not frequently reported. We present three cases of bullous morphea. Although lymphangiectases have been suggested as the most likely mechanism for the development of the bullae in cases of morphea, none of the cases presented with lymphangiectases. To the contrary, all of our cases showed hemorrhagic content in the bullae, which suggests local trauma as a mechanism involved in bulla formation.