Background: Weston Hurst syndrome (WHS), also known as acute hemorrhagic leukoencephalitis (AHLE), has not been previously associated with mixed connective tissue disease (MCTD), a rare rheumatologic disorder.Case presentation: We report a case of a 35-year-old female who presented with deep coma with features of previously undiagnosed MCTD and responded favorably to intravenous immunoglobulin (IVIG) therapy. On detailed historical enquiry, clinical examination, and investigation, AHLE was diagnosed. Furthermore, our patient showed significant improvement with IVIG administration, even though initial steroid therapy was unsuccessful.Conclusion: AHLE, an associated novel neurological manifestation of MCTD, can be responsive to IVIG, which makes this case reportable from the diagnostic as well as the therapeutic point of view.