The document details the case presentation of a 64-year-old woman with persistent dry cough and progressive dyspnea, diagnosed with interstitial pneumonia with autoimmune features suspected secondary to Sjögren's syndrome. Her medical history includes thyroid goiter and the clinical examinations reveal multiple health complaints and significant laboratory findings, including autoantibody positivity. The patient has undergone various diagnostic tests and treatment interventions, leading to a tentative diagnosis involving interstitial lung disease associated with autoimmune conditions.