Patients who have compatible radiologic signs and are at risk for development of invasive pulmonary aspergillosis and invasive pulmonary zygomycosis will have specimens of bronchoalveolar lavage (BAL) fluid supernatant and /or tissue from lung biopsy when available, obtained for the measurement of diagnostic PCR for Aspergillus and Zygomycete identification, proteomics, cytokines and for the presence of galactomannan and (1-3)-Beta-D-glucan. The BAL will be performed only if clinically indicated as part of the patient's routine care of pneumonic infiltrates.