Lichenoid infiltrates can be caused by various conditions, including autoimmune diseases, drug reactions, infections, and idiopathic disorders. Among the most common causes are:
- [Lichen Planus](): An autoimmune disorder that primarily affects the skin and mucous membranes. - [Lichenoid Drug Eruptions](): Reactions to medications such as beta-blockers, nonsteroidal anti-inflammatory drugs (NSAIDs), and anti-malarial drugs. - [Graft-Versus-Host Disease (GVHD)](): A complication following bone marrow transplant. - [Viral Infections](): Infections such as hepatitis C and human papillomavirus (HPV) can also present with lichenoid infiltrates.
