Patient consultation: the child is now 14 years old, the face and the back of the hand gradually grow flat Brown macula, there is an increasing trend recently, diagnosed as flat wart in the local hospital, excuse me: what are the clinical characteristics of flat wart?
Answer: the clinical characteristics of verruca plana: 1. The rash is a flat and smooth papule from the size of a needle to a soybean, round, oval or polygonal, with normal skin color, light brown or light red. The number of rashes is large, scattered or dense, and occasionally the rash is arranged in a strip along the scratch marks. 2. It often occurs on the face, back of hand or forearm. 3. It is common in teenagers. 4. The disease is chronic, and it can take 1-2 years or more, and some of them can subside by themselves. 5. Histopathology: light microscopy showed that the spinous layer was hypertrophic, but there was no papilloma like hyperplasia. Enlarged vacuole cells were seen in the granular layer and the upper part of the spinous layer, and the nucleus was deeply stained. Under the electron microscope, the virus particles in the nucleus could be seen.