Whenever I see this I think of Impetigo, Fungi or Pustular psoriasis and would order a PAS stain.
Munro microabscesses are collections of neutrophils in the stratum corneum.
Bullous impetigo View Slide
Tinea pedis View Slide
Neutrophils in the epidermis can be seen in a variety of inflammatory conditions but remember Acne and folliculitis, Gonococcemia, Necrolytic migratory erythema, Pemphigus erythematosus or foliaceous, Neonatal pustular melanosis, Scabies and Halogenodermas.
If you see Pustules in the epidermis the mnemonic is II
I - Infective Viral, Bacterial, Fungal, Rickettsial, Protozoa
I Inflammatory eg Drugs, Pustular psoriasis, Rare ( Scabies, Necrolytic migratory erythema, Subcorneal pustular dermatosis, Neonatal pustular melanosis, Erosive pustular dermatosis, Acrodermatitis enteropathica, Halogenodermas)
