Granulomatous rosacea in Cornelia de Lange syndrome.

It is true that mycological culture has a higher specificity, but it has lower sensitivity as compared to histopathology with periodic acid-Schiff staining (HP/ PAS).[1,2] HP/PAS is relatively quick, and a specificity of 72% cannot be overlooked.[3] In most cases, morphological aspect of the hyphae and/or spores can suggest the group to which pathogens belong.[3] In personal view of the authors, cost of HP/PAS is not so high considering all these informations obtained after doing this test, and when compared to the cost of onychomycosis therapy.