For almost 2% of cancer patients, the cancer is only found after it has spread to a secondary site. These cancers are called carcinoma of unknown primary site or cancer of unknown primary (CUP). The primary site at times is unidentifiable because the tumor may be very small, the body caused it to shrink, or it was unintentionally removed during surgery. These cancers could be adenocarcinoma, poorly differentiated carcinoma, squamous cell carcinoma, or neuroendocrine carcinoma. The American Cance... Learn More

  Cancer in children can transpire anywhere in the body in the blood and lymph node systems, brain and spinal cord (central nervous system; CNS), kidneys, and other organs and tissues. The types of cancer that infect the young mostly belong to one of these categories; leukemia, brain and spinal cord tumors, neuroblastoma, Wilms tumor, lymphoma (including both Hodgkin and non-Hodgkin), rhabdomyosarcoma, retinoblastoma, and bone cancer (including osteosarcoma and Ewing sarcoma). Statistics1... Learn More

The testicles are two small, egg-shaped glands positioned close to the penis, with the scrotum—a loose skin —surrounding them. Testicles contain germ cells and other cells that make sperm and secrete testosterone. The origin of most testicular cancers is the sperm-producing germ cells, hence are referred to as germ cell tumors. The major categories of testicular cancers are germ cell tumors, stromal tumors, and carcinoma in situ of the testicle. StatisticsTesticular cancer is rampan... Learn More

The vaginal walls have a thin layer of cells called the epithelium made from squamous epithelial cells. Below the epithelium are connective tissue, involuntary muscle tissue, lymph vessels, and nerves. Vaginal intraepithelial neoplasia (VaIN), or vaginal dysplasia, occurs when abnormal cells in the vagina become cancer. These abnormal cells also have a precancerous lesion of the cervix known as cervical intraepithelial neoplasia (CIN). 85% of cancers that incorporate the vagina spread from other... Learn More

Vulvar cancer starts in the vulva of women. Although the most common type is squamous cell carcinoma, adenocarcinoma, melanoma, sarcoma, and verrucous carcinoma. Squamous cancer progresses through a “precancerous” condition, which may develop into cancer called vulva intraepithelial neoplasia (VIN). VIN is a premalignant growth of cells on the vulva that is still not cancerous but can develop into one.Usual-type VIN emerges in younger women and is concomitant with human papillomaviru... Learn More