Michaelis-Gutmann body

Etiology

• pathognomonic for malakoplakia

Pathology

• basophilic inclusions with concentric laminations
• positive staining with periodic acid-Schiff base
• positive staining with von Kossa stain for calcium & Perls Prussian blue stain for iron

Diagnostic procedures

• electron microscopy reveals lysosomes filled with partially digested bacteria

More general terms

• abnormal morphologic structure (malformation)