Radiologic Findings
The radiologic findings are characteristic; diagnosis
can be made without biopsy.12 The findings
change as the disease progresses, and several stages
have been described.8.12 The first stage appears
with onset of the clinical syndrome and consists of
foci of cysts 1 to 4 mm in diameter throughout the
lung fields, interlaced with coarse, streak-like infiltrates,
0.5 to 1 mm thick, giving the lung a "bubbly"
appearance. There are no cardiovascular abnormalities.