"pleural effusion: ~ 50%"
"Pulmonary fibrosis may be diagnosed as UIP at histology. CT may show features that suggest an underlying diagnosis of CTD:"
"A prerequisite for the diagnosis of mixed connective tissue disease is the presence, in the serum, of high titres of antibodies against uridine-rich RNA-small nuclear ribonucleoprotein (snRNP) 2."