Final answer:
The CXR showing diffuse bilateral ground glass infiltrates in a febrile patient taking high dose immunosuppressants is highly suggestive of Pneumocystis jirovecii pneumonia (PCP). PCP is commonly seen in patients with compromised immune systems and can be fatal if left untreated.
Step-by-step explanation:
The CXR (chest X-ray) showing diffuse bilateral ground glass infiltrates in a febrile patient taking high dose immunosuppressants is highly suggestive of Pneumocystis jirovecii pneumonia (PCP), a fungal infection of the lungs.
PCP is commonly seen in patients with acquired immunodeficiency syndrome (AIDS) and other compromised immune systems. The diagnosis of PCP is typically confirmed by microscopic examination of tissue and fluid samples from the lungs or by PCR-based testing in asymptomatic patients with AIDS. The most effective treatment for PCP is the combination drug trimethoprim-sulfamethoxazole (TMP/SMZ). If left untreated, PCP infections can be fatal.