Piezogenic papules--a study of 100 cases

Area of Science:

• Dermatology
• Histopathology

Background:

• Piezogenic papules are a common finding, often presenting as painless papules on the skin.
• These papules are characterized by herniation of subcutaneous fat through dermal defects.

Purpose of the Study:

• To investigate the prevalence and histological characteristics of piezogenic papules on the feet and wrists.
• To compare the histological findings between pedal and wrist piezogenic papules.

Main Methods:

• Examination of 100 individuals for the presence of piezogenic papules.
• Detailed recording of the location (pedal, wrist), laterality, and multiplicity of papules.
• Histopathological analysis of biopsy specimens from affected areas.

Main Results:

• Piezogenic papules were found in 80% (pedal) and 86% (wrist) of the examined individuals.
• 74% had papules on both feet and wrists; most were bilateral and multiple.
• Biopsies demonstrated fragmentation of dermal elastic tissue and herniation of subcutaneous fat, with similar histology for pedal and wrist papules.

Conclusions:

• Piezogenic papules are highly prevalent on both the feet and wrists.
• The histological features of piezogenic papules are consistent regardless of location.
• Piezogenic papules represent a localized herniation of fat due to dermal weakness.