Planar worts or plantar verruca refer to superficially based benign epithelial lesions occurring in the dermal / subdermal layers of the skin.
Pathology
They are thought to be caused by infection by human papillomavirus types 1, 2, 4, 60, or 63 and sometimes by types 57, 65, 66, nd 156.
Radiographic features
Ultrasound
The diagnosis is primarily clinical but may be seen as a hypoechoic lesions lying subdermally along the plantar surface of the feet. Associated soft tissue inflammation may be demonstrated by 2
- an increase in sublesional arterial blood flow in the dermis
- an accompanying plantar bursitis
- focal decrease in subcutaneous echogenicity