Eruptive Keratoacanthomas AssociatedWith Leflunomide The keratoacanthoma (KA) is a rapidly growing, welldifferentiated epidermal neoplasm that may be locally invasive or may spontaneously resolve. Most often, KA presents as a solitary lesion; however,multipleKAs canbe seen in various syndromes, including Muir-Torre syndrome, the autosomal dominant Ferguson-Smith syndrome, and Grzybowskitype eru...

Assessment of volcanic hazards is necessary for risk mitigation. Typically, hazard assessment is based on one or a few, subjectively chosen representative eruptive scenarios, which use a specific combination of eruptive sizes and intensities to represent a particular size class of eruption. While such eruptive scenarios use a range of representative members to capture a range of eruptive sizes ...

Xanthomas are localized lipid deposits in the skin, tendons and subcutaneous tissue associated with lipid abnormality. The hyperlipidemia responsible for this disorder can be caused by a primary genetic defect, a secondary disorder, or both. That kind of skin exanthema may be the first signal of cardiovascular risk. We present a 24-year-old woman with a skin eruption that had appeared a few mon...

CONTEXT Pulmonary Langerhans cell histiocytosis is the most common and best known pulmonary histiocytic lesion; however, the realm of pulmonary histiocytic lesions also includes an assortment of uncommon diseases that may exhibit pulmonary involvement. OBJECTIVE To review pulmonary Langerhans cell histiocytosis and other pulmonary histiocytoses to better ensure correct diagnosis and optimal a...

The submarine volcanic eruption occurring near El Hierro (Canary Islands) in October 2011 provided a unique opportunity to determine the effects of such events on the microbial populations of the surrounding waters. The birth of a new underwater volcano produced a large plume of vent material detectable from space that led to abrupt changes in the physical-chemical properties of the water colum...

Finally, familial cutaneous collagenoma must be differentiated from two distinct types of eruptive collagenoma. Eruptive collagenoma type 1 is clinically and histologically similar to familial cutaneous collagenoma but without documented familial inheritance. Eruptive collagenoma type 2 presents cutaneous lesions smaller than those of familial cutaneous collagenoma and arranged on the extremiti...

Pre-Eruptive Intracronal Radiolucency (PEIR) is seen as a radiolucent anomaly at coronal dentin of unerupted teeth. PEIR is often confused because of similarities with dental caries. Pre-eruptive intracoronal resorptions are typically observed as radiolucency in dentin tissue, and the lesions are close to the enamel dentin junction. Lesions are often coincidentally noticed on the radiographs of...

BACKGROUND Langerhans cell histiocytosis affects mainly young children and features an accumulation of CD1a+ dendritic Langerhans cells in the bone, skin, and other organs. A few cases of Langerhans cell histiocytosis on the penis have been reported in the literature. We present a case of Langerhans cell histiocytosis on the penis and review the similar cases in the literature. CASE PRESENTAT...