DermNet provides Google Translate, a free machine translation service. Note that this may not provide an exact translation in all languages
Author: Assoc Prof Patrick Emanuel, Dermatopathologist, Auckland, New Zealand, 2013.
Tinea nigra is a superficial mycosis caused by Hortaea werneckii.
The epidermis and dermis of the acral skin infected with tinea nigra are largely unremakarkable at low power magnification (figure 1). In the superficial aspects of the stratum corneum, numerous short, segmented hyphae and spores are seen These organisms have a characteristic brown-yellow colour on routine haematoxylin and eosin sections (figure 2, arrows).
Tinea nigra pathology
The organisms are typically easy to identify at high power with haematoxylin and eosin sections. PAS and GMS stains can also be used to highlight the morphology.
Tinea – The fungal forms of tinea (dermatophyte infection) lack the characteristic brown-yellow pigment and typically shows more of an inflammatory response.
© 2021 DermNet New Zealand Trust.
DermNet NZ does not provide an online consultation service. If you have any concerns with your skin or its treatment, see a dermatologist for advice.