Hiraoka K, Horie A, Kunisaki M
J UOEH. 1985 Jun 1;7(2):229-35. doi: 10.7888/juoeh.7.229.
A case of precancerous hair follicle tumor of a 60-year-old woman is reported. The tumor was detected in the large pudendal lip of an ATL-suspected patient. Microscopic findings showed that the tumor was a hair follicle tumor of low malignancy, such as a "malignant trichilemmoma", or "follicular Bowen's disease". Histogenesis and pathogenesis of this tumor are discussed including the relationships to ATL and "Trichilemmal horn".