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ISSN 0210-5187 (Electronic)

2003, Number 6

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Med Cutan Iber Lat Am 2003; 31 (6)

Seborrheic Keratosis: a Clinical, Dermatoscopical and Histopathological Evaluation

Donato PC, Prado SSA

Language: Portugués
References: 20
Page: 363-366
PDF size: 102.36 Kb.


ABSTRACT

Background: Seborrheic keratosis is a benign epithelial tumor, with multiple clinical aspects, suggestive dermatoscopical structures, and diverse histopathological classifications.
Objectives: Evaluation of the distribuition of the lesions over the body, and the correlation between its clinical, dermatoscopical, and histopathological aspects as well as search for the Leser-Trélat signal.
Method: A total of 101 pacients were examined and interviewed, with a total of 7929 lesions, which body distribution was analysed. The 215 resected lesions had their clinical and dermatoscopical aspects related to the histopathological findings.
Results: Out of the 7,929 lesions; 29.70% were on the head and neck; 61.81% in the trunk; 4.41% in the upper limbs; 4.07% in the lower limbs. This points to a larger concentration in the region of head and neck, if taken into account the surface area of each region. Itch was mentioned by 31 patients (30.69%). Out of the 215 resected lesions; 3.72% showed rosy or yellowish color, and 96.28% were brown or black. The surface of the lesions was classified by the aspect, smooth or rough, the presence of grooves or keratotic plugs. These surface aspects were correlated to the histopathological classification. Dermatoscopy showed horny pseudocysts, or pseudofollicular openings in 78.60% of the lesions. The histopatological classification showed 64.65% of the lesions as acanthotic; 30.09% as hyperkeratotic, and 3.26% as reticulated.
Conclusions: The head and neck regions present the larger concentration of keratosis. According to the histopathology, the color of the lesions is related to the presence of melanin, and the rough surface, or with grooves, to the hyperkeratotic type. The presence of horny pseudocysts, or pseudofollicular openings in 78.60% of the lesions, suggests that the dermatoscopy can help in the diagnosis. The sign of Leser-Trélat was not seen.


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