Correct!
2. Complete blood count with differential
The imaging findings could be caused by fungal infection, but other, more likely, considerations remain, and none of the data provided thus far directly suggests fungal infection. 18FFDG-PET scanning would likely not provide management-altering information- elevated tracer uptake in the lung opacities could be the result of inflammation or neoplasm, whereas lack of tracer utilization would not obviate the need for investigation of the abnormal chest radiography and thoracic CT findings. Surgical lung biopsy is not an incorrect choice, given that it is a very useful technique for the evaluation of diffuse lung disease. However, such an invasive approach is premature at this point. Percutaneous transthoracic lung biopsy is generally not the procedure of choice for the investigation of diffuse lung abnormalities. A simple test- a complete blood count with differential- is the best choice among those provided. The results of the complete blood count, in combination with the thoracic CT findings, may provide enough information for a working diagnosis.
Which of the following results of the complete blood count correlate best with the differential diagnostic considerations based on the imaging findings?