Most anal cancers are squamous cell carcinomas (epidermoid carcinomas), that arises near the squamocolumnar junction. It is characterized by clusters of abscesses, epidermoid cysts, sebaceous cysts, pilonidal cysts. Potential complications are development of ameloblastoma, epidermoid carcinoma or mucoepidermoid carcinoma. Lung implantation of B"j"F also induced lung epidermoid carcinomas in 3-month-old female rats. Intracranial epidermoid cysts develop in the early embryonic phases. An epidermoid cyst is one type of vaginal cyst. The most common health issue was "radium jaw" (bone necrosis), anemia, epidermoid carcinomas, and sarcomas. A431 cells are a model human cell line (epidermoid carcinoma) used in biomedical research. Occasionally, an epidermoid cyst will present with trigeminal neuralgia. Soon after, Lacks was told that she had a malignant epidermoid carcinoma of the cervix. The epidermoid cyst may have no symptoms, or it may be painful when touched. In practice, however, the term is still often used for epidermoid and pilar cysts. Epidermoid tumors strongly adhere to the brain stem or cranial nerves. Depending on which part the epidermoid is pressing against can result in varying symptoms. Epidermoid cysts originate in the epidermis and pilar cysts originate from hair follicles.