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Drugs and diseases reference index

Drugs and diseases reference index
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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «O»:

  1. Ossification Ossification
    Ossification: The process of creating bone, that is of transforming cartilage (or fibrous tissue) into bone. The human skeleton initially consists largely of cartilage which is relatively soft and is gradually transformed into hard bone during infant and child development. The verb corresponding to...
  2. Ossify Ossify
    Ossify: To make into bone; to convert cartilage or fibrous tissue into bone. The skeleton initially consists mainly of cartilage which is gradually transformed into bone during development. This bone-building process is termed "ossification." Bone is "osseous" tissue. "Os" is a synonym for "bone." T...
  3. Osteitis Osteitis
    Osteitis: Osteitis is inflammation of the bone. For example, patients with what is called the SAPHO syndrome develop osteitis -- the O in SAPHO stands for oteitis -- and the bone inflammation typically affects the sacroiliac joints (sacroiliitis) and the spine (spondylitis). This leads to pain and s...
  4. Osteitis deformans Osteitis deformans
    Osteitis deformans: Better known today as Paget disease, this is a chronic bone disorder that typically results in enlarged, deformed bones due to excessive breakdown and formation of bone tissue that can cause bones to weaken and may result in bone pain, arthritis, bony deformities and fractures. T...
  5. Osteitis fibrosa cystica Osteitis fibrosa cystica
    Osteitis fibrosa cystica: A condition associated with hyperparathyroidism in which bone tissue is gradually replaced by cysts and fibers....
  6. Osteo- (prefix) Osteo- (prefix)
    Osteo- (prefix): Combining form meaning bone. From the Greek "osteon", bone. Appears for instance in osteoarthritis, osteochondroma osteodystrophy, osteogenesis, osteomyelitis, osteopathy, osteopetrosis, osteoporosis, osteosarcoma, etc....
  7. Osteoarthritis Osteoarthritis
    Osteoarthritis: A type of arthritis caused by inflammation, breakdown, and eventual loss of cartilage in the joints. Also known as degenerative arthritis....
  8. Osteoarthropathy Osteoarthropathy
    Osteoarthropathy: Any disease of the bones and joints. From osteo-, bone + -arthro-, joint, + pathy, disease....
  9. Osteoblast Osteoblast
    Osteoblast: A cell that makes bone. It does so by producing a matrix that then becomes mineralized. Bone mass is maintained by a balance between the activity of osteoblasts that form bone and other cells called osteoclasts that break it down. See also: Osteoclast....
  10. Osteoblastoma Osteoblastoma
    Osteoblastoma: A benign tumor in bone tissue. Osteoblastomas are small, and are seen most frequently in children or young adults. Symptoms include pain and bone mass reduction. Treatment is primarily by surgery. Chemotherapy and radiation have also been used to treat osteoblastoma but are controv...
  11. Osteochondritis dissecans Osteochondritis dissecans
    Osteochondritis dissecans: A condition in which a fragment of bone in a joint is deprived of blood and separates from the rest of the bone, causing soreness and making the joint "give way". Diagnosis is by X-ray. Treatment is usually by casting, although if the fragment has detached completely,...
  12. Osteochondroma Osteochondroma
    Osteochondroma: An abnormal, solitary, benign growth of bone and cartilage, typically at the end of a long bone. Osteochondromas are usually discovered in persons 15 to 25 years of age. They are typically detected when the area is injured, or when they become large. It can be a hereditary condit...
  13. Osteochondromatosis Osteochondromatosis
    Osteochondromatosis: A condition characterized by multiple benign tumors of cartilage called osteochondromas projecting from bone, most often from near the ends of long bones. In a small proportion of cases, an osteochondroma may become malignant. The propensity to develop multiple osteochondromas i...
  14. Osteochondromatosis, synovial Osteochondromatosis, synovial
    Osteochondromatosis, synovial: A disorder of a joint featuring a change of the normal joint lining (synovium) tissue's cellular structure to form bone-cartilage tissue. Synovial osteochondromatosis is uncommon. It typically presents in young to middle-aged adults. Synovial osteochondromatosis leads ...
  15. Osteochondrosis Osteochondrosis
    Osteochondrosis: Any disease that affects the progress of bone growth by killing bone tissue. Osteochondrosis is seen only in children and teens whose bones are still growing....