Lymph node cytology

Mycobacterium avium

 

Cervical lymphadenopathy in an HIV+ pt.

 

Microscopically, Mycobacterium avium-intracellulare infection is marked by numerous acid fast organisms growing within macrophages. Lots of bright red rods are seen, particularly in macrophages, in this acid fast stain of lymph node.

 

Cryptococcus neoformans

 

Yeasts of varying size with narrow based budding

Thick polysaccharide capsule