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The page below is a sample from the LabCE course . Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Mucin within goblet cells demonstrated by mucicarmine stain

Mucicarmine: Diagnostic Applications

The mucicarmine staining procedure is very specific in its detection of mucins of epithelial origin. It is often used to identify adenocarcinomas, distinguishing these from squamous-cell carcinomas. It is particularly useful in detecting adenocarcinomas originating from the gastrointestinal tract. 

This procedure can also successfully stain and detect the capsule of a fungal organism known as Cryptococcus neoformans . This fungus is usually identified in the lungs and in nervous tissues. C. neoformans is more likely to infect immunocompromised patients than persons with active immune systems.