[Oral erosive lichen planus associated with Good syndrome].

INTRODUCTION: Good syndrome is characterized by thymoma, hypogammaglobulinemia, low number of peripheral B cells, and variably, peripheral CD4 T cell lymphopenia and inverted CD4/CD8 T cell ratio, associated with infections and autoimmune diseases. CASE REPORT: We report an 85-year-old woman who presented with oral erosive lichen planus and thymic tumor. Improvement of oral erosive lichen planus was observed after resection of a benign thymoma, but was ineffective on the immunodeficiency syndrome. Only 11 patients with Good syndrome and lichen planus have been previously reported and are reviewed.
CONCLUSION: The association of oral erosive lichen planus with Good syndrome is rare, but does not seem to be fortuitous.