A patient with Kaposi’s Sarcoma and Castleman disease presented with acute kidney injury, revealing a complex disseminated infection. Diagnostic workup identified disseminated microsporidiosis, specifically Encephalitozoon intestinalis, alongside an intestinal Cryptosporidium coinfection. The diagnosis relied on electron microscopy and PCR testing of tissue samples, highlighting the challenges in identifying these opportunistic pathogens in immunocompromised individuals. The patient's underlying conditions likely contributed to the severe, multi-organ involvement. This case underscores the importance of considering atypical opportunistic infections in patients with compromised immune systems, even when initial tests are inconclusive, and utilizing advanced diagnostic techniques for definitive identification.
Key note: Advanced diagnostic methods like electron microscopy and PCR are crucial for identifying disseminated opportunistic infections in immunocompromised patients.