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Decubitus ulcers appear to be associated with insidious trauma. Differential diagnosis can be tricky, and etiology is controversial with sustained localized pressure which plays a significant role. Sustained pressure can stretch soft tissues and blood vesels, causing multiple microthrombi around the point of maximum compression. This leads to prolonged ischemia and produces a plaque of dead tissue...
The basic morphology of acne-comedones, papules, pustules, and nodules-and the extent of involvement do not permit simple evaluation due to the number of variables involved. Because these acne lesions may vary in number during the natural course of the disease, various measurements have been developed, based on clinical examination and photographic documentation. These range from global assessments...
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