However, in our case, mycobacterium genus-specific PCR (HSP-65) was performed on the kidney tissue, as recommended by international guidelines that suggest that Mycobacterium genus-specific PCR should be considered if histopathology shows non-caseating granulomas and foamy swollen macrophages with or without acid-fast bacilli (Class IIa, Level C”) [7]. This evidence concerns the gene HSPD1 and Granuloma.