What exactly are these lesions and how as long as they be treated? After a beach holiday in Thailand, a 23-year-old guy developed pruritic, serpiginous cords on the sole and medial aspect of his left foot . The cords acquired commenced with an itchy papule, which over the following three weeks shaped an erratic intersecting design with focal areas which were eroded, crusted, haemorrhagic or pustular. A skin biopsy demonstrated subepidermal and intraepidermal blisters with eosinophils that expanded diffusely in to the underlying dermis and subcutis . No organisms were seen.. A serpiginous burrow on the foot A man presents with pruritic, serpiginous cords about his left feet.However, the technique of beginning the evaluation with ultrasonography and obtaining additional imaging when needed on the basis of the judgment of the emergency department physician resulted in decreased contact with radiation. Patients with nephrolithiasis frequently undergo do it again imaging over time; our results showed that replacing preliminary CT with ultrasonography for this often-recurring disease decreased overall radiation exposure. When the accuracy of imaging was analyzed according to the first imaging check an individual underwent, CT had greater sensitivity than ultrasonography, a discovering that was in keeping with prior research.17,18 The specificity for CT was lower than in prior analysis, probably because we used a stringent reference regular of stone diagnosis, which did not rely on the CT results.