Limits...
Scanning electron microscopy of tinea nigra.

Guarenti IM, Almeida HL, Leitão AH, Rocha NM, Silva RM - An Bras Dermatol (2014 Mar-Apr)

Bottom Line: This infection presents as asymptomatic brown to black maculae mostly in palmo-plantar regions.The examination of the outer surface of the sample showed the epidermis with corneocytes and hyphae and elimination of fungal filaments.The inner surface of the sample showed important aggregation of hyphae among keratinocytes, which formed small fungal colonies.

View Article: PubMed Central - PubMed

Affiliation: Catholic University of Pelotas, Pelotas, RS, Brazil.

ABSTRACT
Tinea nigra is a rare superficial mycosis caused by Hortaea werneckii. This infection presents as asymptomatic brown to black maculae mostly in palmo-plantar regions. We performed scanning electron microscopy of a superficial shaving of a tinea nigra lesion. The examination of the outer surface of the sample showed the epidermis with corneocytes and hyphae and elimination of fungal filaments. The inner surface of the sample showed important aggregation of hyphae among keratinocytes, which formed small fungal colonies. The ultrastructural findings correlated with those of dermoscopic examination - the small fungal aggregations may be the dark spicules seen on dermoscopy - and also allowed to document the mode of dissemination of tinea nigra, showing how hyphae are eliminated on the surface of the lesion.

Show MeSH

Related in: MedlinePlus

SEM examination of the inner surface of the sample showing aggregation of hyphaeamong keratinocytes, forming small fungal colonies. KS = keratinocyte innersurface. (8000-16000 x)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4008070&req=5

f03: SEM examination of the inner surface of the sample showing aggregation of hyphaeamong keratinocytes, forming small fungal colonies. KS = keratinocyte innersurface. (8000-16000 x)

Mentions: On the outer surface of the sample scanning electron microscopy showed the epidermiswith corneocytes and hyphae and elimination of fungal filaments (Figure 2). The inner surface of the sample was also examined, sincesome fragments were placed inverted for the examination on the stub. In these specimens,important aggregation of hyphae among keratinocytes was seen, which formed small fungalcolonies (Figure 3).


Scanning electron microscopy of tinea nigra.

Guarenti IM, Almeida HL, Leitão AH, Rocha NM, Silva RM - An Bras Dermatol (2014 Mar-Apr)

SEM examination of the inner surface of the sample showing aggregation of hyphaeamong keratinocytes, forming small fungal colonies. KS = keratinocyte innersurface. (8000-16000 x)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4008070&req=5

f03: SEM examination of the inner surface of the sample showing aggregation of hyphaeamong keratinocytes, forming small fungal colonies. KS = keratinocyte innersurface. (8000-16000 x)
Mentions: On the outer surface of the sample scanning electron microscopy showed the epidermiswith corneocytes and hyphae and elimination of fungal filaments (Figure 2). The inner surface of the sample was also examined, sincesome fragments were placed inverted for the examination on the stub. In these specimens,important aggregation of hyphae among keratinocytes was seen, which formed small fungalcolonies (Figure 3).

Bottom Line: This infection presents as asymptomatic brown to black maculae mostly in palmo-plantar regions.The examination of the outer surface of the sample showed the epidermis with corneocytes and hyphae and elimination of fungal filaments.The inner surface of the sample showed important aggregation of hyphae among keratinocytes, which formed small fungal colonies.

View Article: PubMed Central - PubMed

Affiliation: Catholic University of Pelotas, Pelotas, RS, Brazil.

ABSTRACT
Tinea nigra is a rare superficial mycosis caused by Hortaea werneckii. This infection presents as asymptomatic brown to black maculae mostly in palmo-plantar regions. We performed scanning electron microscopy of a superficial shaving of a tinea nigra lesion. The examination of the outer surface of the sample showed the epidermis with corneocytes and hyphae and elimination of fungal filaments. The inner surface of the sample showed important aggregation of hyphae among keratinocytes, which formed small fungal colonies. The ultrastructural findings correlated with those of dermoscopic examination - the small fungal aggregations may be the dark spicules seen on dermoscopy - and also allowed to document the mode of dissemination of tinea nigra, showing how hyphae are eliminated on the surface of the lesion.

Show MeSH
Related in: MedlinePlus