Lesión en la planta del pie, ¿qué puede ser? / Lesion in the sole of the foot: what could it be?

Las lesiones por cuerpos extraños son frecuentes en la edad pediátrica. La situación en la que un pelo del cabello puede actuar como un cuerpo extraño es infrecuente, reportándose escasos casos clínicos. Se conoce como pili migrans cutáneo a la lesión causada por un pelo del cabello que se encuentra en epidermis y se caracteriza por ser lineal, oscura y muchas veces serpiginosa, con superficie eritematosa, por lo cual es frecuente que se confunda con otras patologías como la larva migrans o la escabiosis. A continuación, se presenta el caso de una niña de 3 años que presentó una lesión en la planta del pie, asintomática y de reciente aparición (AU)

Foreign body injuries are common in the paediatric age group. However, instances in which a hair strand becomes a foreign body are rare, with few clinical cases reported in the past. Cutaneous pili migrans is defined as a lesion caused by a hair embedded in the epidermis, and it manifests as a linear, dark and often serpiginous eruption with an erythematous surface, for which it is frequently confused with other conditions, such as larva migrans or scabies. We report a case in a girl aged 3 years who presented with a lesion in the sole of the foot that was asymptomatic and had appeared recently. (AU)

US-guided Localization and Removal of Soft-Tissue Foreign Bodies.

US-guided foreign body removal is a nonsurgical highly effective technique used to manage symptomatic foreign bodies and should be considered as a first-line treatment procedure. The authors describe a technique used for US detection and US-guided removal of various types of foreign bodies and discuss the efficacy of the procedure. Soft-tissue foreign bodies can result from accidents or medical procedures, and they are a relatively frequent reason that patients obtain medical consultation. Foreign body objects include vegetal, metallic, and glass objects, and they may be medical devices such as contraceptive implants. Frequently, physical examination is not sensitive enough to detect the presence of a foreign body, and imaging is necessary. US has demonstrated high specificity and moderate sensitivity for detection of foreign bodies, and it has the advantage of depicting all types of materials. Thus, US has become the imaging technique of choice for evaluating suspected foreign bodies. Although the US features are dependent on the foreign body type and shape, all foreign bodies are echogenic and frequently demonstrate posterior shadowing or reverberation artifact. US has an added value in that it can be used to plan the removal of a foreign body and also guide the entire percutaneous removal procedure. Through a small incision in the skin, just wide enough for the foreign body to pass through, surgical forceps can be inserted and directed under US guidance to reach the foreign body and remove it. The effectiveness of US-guided percutaneous removal can be near 100%. Online supplemental material is available for this article. ©RSNA, 2020.