Germ cell tumors are uncommon neoplasms that develop from the primitive cells that give rise to eggs and sperm. These tumors most commonly develop in the ovaries and testicles but may occur anywhere in the body, including the brain. Germ cell...
The ovaries contain several cell types supporting the eggs. One of these cell types is the granulosa cell, which helps to produce estrogen, other steroids and growth factors for the eggs. Overgrowth of granulosa cells is a granulosa cell tumor....
A benign tumor is an abnormal mass of tissue that lacks the capacity to spread to other locations. The inability to spread is a distinguishing characteristic that separates benign tumors from cancerous tumors. Benign tumors can arise from...
Causes of hard bumps under the skin of your arm include ganglion cysts and giant cell tumors. Both are noncancerous, but these can be alarming without appropriate diagnosis. Problems caught early can be treated more sufficiently, so always seek...
Testicular cancer is a rare but potentially serious problem that may develop in one or both of a man's testicles. Fortunately, testicular cancer is highly treatable and curable. According to the American Cancer Society, about 90 percent of...
Testicular cancer occurs in men, typically around the age of 30 when normal cells in the testis change and become tumorigenic. The majority of testicular tumors originate from germ cells. While most testicular tumors respond favorably to radiation...
Malignant tumors of the central nervous system, or CNS -- meaning the brain and spinal cord -- are relatively rare compared to other cancers, but when they do occur, they are often deadly. The Central Brain Tumor Registry of the United States...
The kidneys are organs designed to filter the blood, and are made up of a number of highly specialized cell types. Cell growth in the kidney is tightly controlled, and defects in cell growth lead to diseases such as cancer. Cancer is the...
Testicular tumors are tumors that develop in the cells of the testicles, the egg-shaped male reproductive glands in the scrotum. There are numerous kinds of testicular tumors, but treatment with surgery, radiation and/or chemotherapy has produced...
Ovarian cancer is a gynecologic cancer that arises from the ovaries. There are various types of ovarian cancer, depending on where in the ovaries the cancer started, and how the cells look under the microscope. The American Cancer Society lists...
Testicular cancer accounts for about 1 percent of all cancers in men and is the most prevalent type of cancer in younger men. With early detection and treatment, testicular cancer has a very high survival rate: About 95 percent of patients with...
The body contains many bones that serve to support it. Bones are constantly being made and broken down. Specifically, bones can break down and result in high calcium levels in your blood. Sometimes, bones may fuse and create movement problems....
Benign bone tumors are noncancerous bone growths, which most commonly occur in the long bones of the arms and legs. Benign tumor types include chondroblastomas, chondromyxoid fibromas, enchondromas, giant cell tumors, nonossifying fibromas,...
Mediastinal germ cell cancer is a rare but dangerous type of cancer usually seen in childhood. A diagnosis of cancer is always frightening, but especially when the patient is a child. Children do not always understand serious illness and rely on...
Ovarian cancer begins in the tissues of the ovary, one of the reproductive glands where eggs are formed. The National Cancer Institute estimates that in 2009, there will be 21,550 new cases of ovarian cancer diagnosed in the United States. Early...
The word "tumor" is the Latin word for "swelling." Simply put, tumors are growths that occur where they are not supposed to.
The American Cancer Society (ACS) reports that there were approximately 8,400 new cases of testicular cancer in 2009, and this disease was fatal in approximately 380 men. As the numbers show, the risk of dying of testicular cancer is relatively...
Although bones are hard and rigid they are made up of living cells. There are two types of bones: flat bones, which are those such as the skull that are responsible for protecting organs; and long bones, which provide support such as the bones in...
Non-Hodgkin's Lymphomas (NHLs) are a diverse group of cancers caused by tumors in the body's lymphocytes, or immune system cells. There are many types of NHLs, each of which is classified according to its rate of growth (slow-growing, intermediate...
A lesion is a localized pathological change in a tissue. Many diseases affect the functioning or structure of bones, which are responsible for support, movement and synthesis of blood cells in the marrow. Bone lesions may be classified in various...
The incidence of testicular cancer in the United States is very low, accounting for only 1 percent of all male cancers. Testicular cancer is most often diagnosed in young, white men between the ages of 20 and 39, according to the National Cancer...
Testicular cancer is cancer that begins in a testicle, which is the primary male sex gland and produces the male sex hormones and sperm. In the United States, testicular cancer is fairly rare, accounting for only 1 percent of all cancers in men....
Estrogen is any substance, natural or artificial, which induces estrogenic activity. Estradiol is the most potent form of estrogen produced by the body. Derived from cholesterol, it is produced by fat cells, arterial walls, adrenal glands, brain...
Cancer cells circulating in the blood are usually tumors of the blood cells themselves, known as leukemias. The World Health Organization recognizes more than 32 unique leukemias arising in children and adults. Acute leukemias usually have a more...
Brain cancer, the abnormal and uncontrollable growth of cells in the brain, most often affects children between the ages of 3 and 12 and adults between the ages of 40 and 70, according to the National Cancer Institute. Because the brain serves as...
Testicular cancer, cancer originating in the male testes, is a rare form of cancer accounting for only 1 percent of all male cancers, according to TC-Cancer.com. Although rare, it is the most common type of cancer affecting men between the ages of...
According to the American Cancer Society, there are three main types of ovarian tumors. Epithelial tumors begin in the cells that cover the outer surface of the ovary. Germ cell tumors begin in the cells producing the eggs. Stromal tumors begin in...
In men, testosterone is created in the testes and in females, it is mainly created in the ovaries. Testosterone levels in the body determine when puberty arrives in boys and also controls sexuality in men. In women, if testosterone levels are...
The ovaries are part of a woman's reproductive system, and are where eggs are formed. When cancer forms in the tissues of these organs, it is called ovarian cancer. The majority of ovarian cancers are epithelial carcinomas, which means the cancer...
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