Articles

  • Disease

    Leiomyosarcoma

    Superficial muscles are close to the surface of the skin. Muscles which lie closer to bone or internal organs are called deep muscles.

    A leiomyosarcoma is a rare cancerous tumor of the smooth muscle cells. It is most often found in the uterus or abdomen.

  • Disease

    Leukemia

    A small amount of bone marrow is removed during a bone marrow aspiration. The procedure is uncomfortable, but can be tolerated by both children and adults. The marrow can be studied to determine the cause of anemia, the presence of leukemia or other malignancy, or the presence of some storage diseases, in which abnormal metabolic products are stored in certain bone marrow cells.

    Leukemia is a type of blood cancer that begins in the bone marrow. Bone marrow is the soft tissue in the center of the bones, where blood cells are...

  • Disease

    Leukemoid reaction

    Antigens are large molecules (usually proteins) on the surface of cells, viruses, fungi, bacteria, and some non-living substances such as toxins, chemicals, drugs, and foreign particles. The immune system recognizes antigens and produces antibodies that destroy substances containing antigens.

    A leukemoid reaction is an increase in the white blood cell count, which can mimic leukemia. The reaction is actually due to an infection or another disease...

  • Disease

    Leydig cell tumor

    
The male reproductive structures include the penis, the scrotum, the seminal vesicles and the prostate.

    A Leydig cell tumor is a tumor of the testicle. It develops from Leydig cells. These are the cells in the testicles that release the male hormone, testosterone.

  • Disease

    Liver cancer - hepatocellular carcinoma

    The esophagus, stomach, large and small intestine, aided by the liver, gallbladder and pancreas convert the nutritive components of food into energy and break down the non-nutritive components into waste to be excreted.

    Hepatocellular carcinoma is cancer that starts in the liver.

  • Disease

    Liver metastases

    A liver biopsy is not a routine procedure, but is performed when it is necessary to determine the presence of liver disease and to look for malignancy, cysts, parasites, or other pathology.  The actual procedure is only slightly uncomfortable.  Most of the discomfort arises from being required to lie still for several hours afterwards to prevent bleeding from the biopsy site.

    Liver metastases refer to cancer that has spread to the liver from somewhere else in the body. Liver metastases are not the same as cancer that starts in the...

  • Disease

    Lung cancer

    Lung cancer is cancer that starts in the lungs. The lungs are located in the chest. When you breathe, air goes through your nose, down your windpipe...

  • Disease

    Lung cancer - non-small cell

    The major features of the lungs include the bronchi, the bronchioles and the alveoli. The alveoli are the microscopic blood vessel-lined sacks in which oxygen and carbon dioxide gas are exchanged.

    Non-small cell lung cancer (NSCLC) is the most common type of lung cancer. It usually grows and spreads more slowly than small cell lung cancer. There are 3...

  • Disease

    Lung cancer - small cell

    This chest x-ray shows adenocarcinoma of the lung. There is a rounded light spot in the right upper lung (left side of the picture) at the level of the second rib. The light spot has irregular and poorly defined borders and is not uniform in density. Diseases that may cause this type of x-ray result would be tuberculous or fungal granuloma, and malignant or benign tumors.

    Small cell lung cancer (SCLC) is a fast-growing type of lung cancer. It spreads much more quickly than non-small cell lung cancer. There are two types of...

  • Disease

    Lung metastases

    Bronchoscopy is a surgical technique for viewing the interior of the airways. Using sophisticated flexible fiber optic instruments, surgeons are able to explore the trachea, main stem bronchi, and some of the small bronchi. In children, this procedure may be used to remove foreign objects that have been inhaled. In adults, the procedure is most often used to take samples of (biopsy) suspicious lesions and for culturing specific areas in the lung.

    Lung metastases are cancerous tumors that start somewhere else in the body and spread to the lungs.