Shrinking lung is a feature of
Shrinking lung syndrome (SLS) is an uncommon feature of systemic lupus erythematosus (SLE) characterized by dyspnea, pleuritic chest pain, diaphragmatic elevation, restrictive ventilatory defect and reduced respiratory muscle strength as measured by volitional tests. Ref - pubmed.com
SLE
Rheumatoid ahritis
Sarcoidosis
Scleroderma
Immune system