Diagnostic perspectives on mixed connective tissue disease with tuberculosis overlap.

The recently published case report describing mixed connective tissue disease coexisting with tuberculosis (TB) provides an important contribution to the growing literature on complex autoimmune-infectious disease interactions. This letter expands on the diagnostic challenges highlighted by the authors by defining its added clinical value: Identifying practical diagnostic "red flags", emphasizing parallel consideration of autoimmunity and infection, and proposing a pragmatic approach to evaluation in TB-endemic settings. Early immunological testing, differentiated pulmonary assessment, and multidisciplinary decision-making are essential when overlapping features obscure timely diagnosis and complicate therapeutic choices.