Amyloidosis initially only manifesting as oral mucosal hemorrhagic lesions: a case series report.

Amyloidosis is a heterogeneous series of diseases associated with extracellular amyloid protein depositions, which can involve multiple organs and tissues, leading to tissue structure alterations and organ dysfunction. The tongue is the most frequently involved site of oral amyloidosis, and one of its characteristic clinical presentations is macroglossia. Here, we report 3 extremely rare cases of amyloidosis exclusively appearing as multiple blood blisters, petechiae, and ecchymoses of the oral mucosa, in the absence of common clinical manifestations of oral and systemic amyloidosis. In a word, we highlight the possibility of oral mucosal hemorrhagic lesions as the initial clinical signs of systemic amyloidosis and the significance of the early and timely diagnosis of amyloidosis.