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.
The city has served as the capital of Nevada since statehood in 1864 and for much of its history was a hub for the Virginia and Truckee Railroad, although the tracks were removed in the 1950s. Prior to 1969, Carson City was also the county seat of Ormsby County. In 1969, the county was abolished, and its territory was merged with Carson City to form the Consolidated Municipality of Carson City. With the consolidation, the city limits today extend west across the Sierra Nevada to the California state line in the middle of Lake Tahoe.