read more, insect bites, seborrheic keratoses Seborrheic Keratoses Seborrheic keratoses are superficial, often pigmented, epithelial lesions that are usually warty but may occur as smooth papules. Examples include nevi, warts, lichen planus Lichen Planus Lichen planus is a recurrent, pruritic, inflammatory eruption characterized by small, discrete, polygonal, flat-topped, violaceous papules that may coalesce into rough scaly plaques, often accompanied. Papules are elevated lesions usually < 10 mm in diameter that can be felt or palpated. The most serious of these are discussed elsewhere in THE MANUAL and include Stevens-Johnson syndrome and toxic epidermal necrolysis, hypersensitivity. read more (can also have papules and plaques), and some allergic drug eruptions Drug Eruptions and Reactions Drugs can cause multiple skin eruptions and reactions. It is characterized by fever, cough, coryza, conjunctivitis, an enanthem (Koplik spots) on the oral mucosa. read more, measles Measles Measles is a highly contagious viral infection that is most common among children. read more, rubella Rubella ( See also Congenital Rubella.) Rubella is a contagious viral infection that may cause adenopathy, rash, and sometimes constitutional symptoms, which are usually mild and brief. read more, and the rashes of rickettsial infections Overview of Rickettsial and Related Infections Rickettsial diseases (rickettsioses) and related diseases (anaplasmosis, ehrlichiosis, Q fever, scrub typhus) are caused by a group of gram-negative, obligately intracellular coccobacilli. Port-wine stains are capillary vascular malformations that are present at birth and that manifest. Examples include freckles, flat moles, tattoos, and port-wine stains Capillary Malformations Capillary malformations are present at birth and appear as flat, pink, red, or purplish lesions. Macules represent a change in color and are not raised or depressed compared to the skin surface. Macules are flat, nonpalpable lesions usually < 10 mm in diameter.
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