A case of paraneoplastic erosive ulcerative lichen planus rubrum associated with a rectal adenocarcinoma
A case of paraneoplastic erosive ulcerative lichen planus rubrum associated with a rectal adenocarcinoma The erosive ulcerative form of lichen planus ru-brum localized on the oral mucosa is the most resistant to treatment from all types of the disease. It becomes malignant in 3% of cases and quite often is of a paraneoplastic character. We present a clinical case of an aggressive and resistant to treatment paraneoplastic erosive ulcerative lichen planus rubrum of the oral mucosa and the vermilion zone in a patient with polygonal papules typical for this dermatosis. The papules resolved after surgical removal of colorectal cancer tumor that was diagnosed at an early stage (adenocarcinoma in situ). We draw attention to the necessity of timely and careful assessment of patients with erosive ulcerative lichen planus rubrum for malignant neoplasms.