Category: L

  • Leptomeningitis

    Inflammation of the leptomeninges. Inflammation of the inner membranes (the pia mater and arachnoid) of the brain and spinal cord. Meningitis in which infection, carcinoma, or inflammation involves only the pia mater and arachnoid membranes of the brain, not the dura mater.  

  • Leptomeninges

    The two inner meninges, the pia mater and arachnoid. Arachnoid membrane and pia mater, the inner two of the three layers covering the brain and spinal cord.  

  • Leptocyte

    A thin red blood cell found in anaemia. A red blood cell (erythrocyte) that is abnormally thin. Leptocytes are seen in certain types of anemia.  

  • Leproma

    A lesion of the skin caused by leprosy. A cutaneous nodule or tubercle characteristic of leprosy.  

  • Lepidosis

    A skin eruption in which pieces of skin fall off in flakes. Any scaly or desquamating eruption such as pityriasis.  

  • Leontiasis

    A rare disorder in which the skull bones become enlarged and may give the appearance of a lion’s head. It occurs if Paget’s disease is not treated. Condition in which a person has a somewhat lionlike facial expression or head structure; occurs in some diseases (e.g., leprosy). Overgrowth of the skull bones, said to resemble…

  • Lentigo


    A small brown spot on the skin often caused by exposure to sunlight. Lentigines, brown, roundish flat spot on the skin, often the result of exposure to the sun. A brown roundish flat spot on the skin caused by excess development of melanin. Commoner in old people, lentigo sometimes turns into a slow-growing skin cancer.…

  • Lens implant

    An artificial lens implanted in the eye when the natural lens is removed, as in the case of cataract. Artificial clear plastic lens implanted in the eye, usually when the natural lens has been removed because of a cataract but sometimes to treat other eye abnormalities. A synthetic prosthesis (man-made replacement) utilized to substitute the…

  • Lembert’s suture

    A suture used to close a wound in the intestine which includes all the coats of the intestine [Described 1826. After Antoine Lembert (1802—51), French surgeon.]  

  • Leishmania

    A tropical parasite which is passed to humans by the bites of sandflies and causes the group of infections known as leishmaniasis. A genus of parasitic flagellate protozoans, several species of which cause disease in man (see leishmaniasis). The parasite assumes a different form in each of its two hosts. In man, especially in kalaazar…