NDLI: Cryptococcoma of a transplanted kidney in a patient presenting with recurrent urinary tract infection: a case report

Content Provider	Springer Nature : BioMed Central
Author	Muranda, Albert Z. Greeff, Ludolf Sathekge, Mike M. Lengano, Thabo Karusseit, Victor O. L.
Abstract	Background Cryptococcosis is an important opportunistic infection of organ transplant recipients. It is the third most common fungal infection of transplant patients and occurs especially in kidney recipients. Cryptococcus neoformans is a ubiquitous fungus which infects humans by inhalation of spores. C. gattii has more recently been recognised as a pathogen. Infection commonly is disseminated affecting mainly the central nervous system and the lungs. Cryptococcoma, a localised form of the disease, has been described in various organs. We present a unique case of a cryptococcoma in a transplanted kidney. The lesion was not seen on ultrasound or uncontrasted computerised tomography but was detected by FDG-PET/CT. Case presentation A 30 year old woman received a deceased donor kidney transplant in 2005. Due to chronic allograft nephropathy in 2014, cyclosporine and azathioprine immunosuppression was changed to tacrolimus and mycophenolate. After rapid deterioration of renal function in 2015 due to suspected non-adherence to immunosuppressants, steroid pulses were administered. The patient developed severe recurrent bacterial urinary tract infections and demonstrated several features of severe immunosuppression. She was treated for cytomegalovirus infection and BK virus was demonstrated in the urine. In addition, Kaposi sarcoma of the stomach was diagnosed on endoscopic biopsy. A metabolically-active lesion of the kidney transplant was imaged on FDG-PET/CT scan. Biopsy of the lesion demonstrated infection with cryptococcus. Escherichia coli with the same antibiotic sensitivity spectrum as that in the urine was cultured from the biopsy. Cryptococcus was not cultured from urine at that time or from several subsequent specimens. The lesion was not detected by conventional imaging. The patient manifested no other evidence of cryptococcosis. The lesion responded poorly to treatment with fluconazole. Conclusions This is probably the first report of a case of a cryptococcoma in a transplanted organ. FDG-PET/CT scan, which is dependent on cellular metabolism, proved useful in visualising the lesion. Clinicians should be aware of this rare presentation of cryptococcosis in organ transplant recipients.
Related Links	https://bmcnephrol.biomedcentral.com/counter/pdf/10.1186/s12882-018-0891-8.pdf
Ending Page	5
Page Count	5
Starting Page	1
File Format	HTM / HTML
ISSN	14712369
DOI	10.1186/s12882-018-0891-8
Journal	BMC Nephrology
Issue Number	1
Volume Number	19
Language	English
Publisher	BioMed Central
Publisher Date	2018-04-23
Access Restriction	Open
Subject Keyword	Nephrology Internal Medicine Cryptococcosis Cryptococcoma FDG-PET/CT scan Kidney transplant Urinary tract infection Case report
Content Type	Text
Resource Type	Case study
Subject	Nephrology
Journal Impact Factor	2.2/2023
5-Year Journal Impact Factor	2.6/2023

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