FOB: BAL may be diagnostic in cases due to lymphoma (however, lymphocytosis, >35%, may also be seen in sarcoid, berylliosis, hypersensitivity pneumonitis, drug-induced ILD, LIP)
Normal BAL lymphocyte percentage: <15%
TBB: may be diagnostic
CXR/Chest CT
Miliary pattern (2-3 mm):
May occur with/ without lymphangitic pattern in lymphoma cases
May occur with/ without larger lung nodules in renal cell and melanoma cases
Clinical
Miliary Lung Nodules
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References
Miliary opacities diagnosed as lung metastases of a thyroid carcinoma after 13 years of stability. Chest September 1993 vol. 104 no. 3 981-982
Association of miliary lung metastases and bone metastases in bronchogenic carcinoma. Chest September 1993 vol. 104 no. 3 948-950