Basal cell carcinomas are currently considered to have origin from the folliculo-sebaceous-apocrine germ, also known as trichoblast. The differential diagnosis with trichoblastic carcinoma, a rare malignant form of trichoblastoma, can be challenging. Alternatively, one argument is that basal cell carcinoma is trichoblastic carcinoma. Overexposure to sun leads to the formation of thymine dimers, a form of DNA damage.
Carson, Washington. Carson is a small community within Carson River Valley CDP in Skamania County in the southwestern part of the U.S. state of Washington.
Douglas County is in western Nevada in the western United States. Stretching from Carson Valley and running up into the Sierra Nevada, the county is bordered on the west by California, and contains about 13.2% of Lake Tahoe, which is split across the two states. Carson City, the state capital, lies to the north, and Lyon County to the east.