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Dermoscopy of pyogenic granuloma: a morphological study
P Zaballos1, M Carulla, F Ozdemir
1Department of Dermatology, Hospital Sant Pau i Santa Tecla, 43003 Tarragona, Spain. pzaballos@aedv.es
The British Journal of Dermatology
|September 18, 2010
Summary
Dermoscopy aids in recognizing pyogenic granulomas, but histology is crucial for diagnosis, especially when vascular structures are present, to rule out melanoma.
Area of Science:
- Dermatology
- Dermoscopy
- Oncology
Background:
- Pyogenic granuloma is a common benign vascular lesion.
- It can mimic amelanotic/hypomelanotic melanoma and other tumors.
Purpose of the Study:
- To assess the diagnostic value of dermoscopic features in pyogenic granulomas.
- To differentiate pyogenic granulomas from other skin tumors using dermoscopy.
Main Methods:
- Analysis of digital dermoscopic images from 122 pyogenic granulomas and 140 other tumors.
- Calculation of sensitivity, specificity, and interobserver agreement for dermoscopic structures and patterns.
Main Results:
- Vascular structures were found in 45% of pyogenic granulomas.
- A specific pattern (reddish homogeneous area, white collarette, white rail lines) showed 100% specificity for pyogenic granulomas.
- Other patterns demonstrated 100% specificity when compared to melanoma.
Conclusions:
- Certain dermoscopic patterns are helpful for identifying pyogenic granulomas.
- Dermoscopy is not a replacement for histology, particularly when vascular structures are visible, to exclude melanoma.
