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  2. Onion skin periosteal reaction - Wikipedia

    en.wikipedia.org/wiki/Onion_skin_periosteal_reaction

    It is called onion skin periosteal reaction because it resembles the layers of an onion. These layers are formed due to any pathological process that leads to the variable, excessive growth of the bone. [1] Onion skin periosteal reaction is seen in osteosarcoma, [2] Ewing sarcoma and Langerhans cell histiocytosis. [3]

  3. Periosteal reaction - Wikipedia

    en.wikipedia.org/wiki/Periosteal_reaction

    Examples of periosteal reactive bone in selected specimens of Triceratops. A periosteal reaction can result from a large number of causes, including injury and chronic irritation due to a medical condition such as hypertrophic osteopathy, bone healing in response to fracture, chronic stress injuries, subperiosteal hematomas, osteomyelitis, and cancer of the bone.

  4. Codman triangle - Wikipedia

    en.wikipedia.org/wiki/Codman_triangle

    The advancing tumour displaces the periosteum away from the bone medulla. The displaced and now lateral periosteum attempts to regenerate underlying bone. This describes a periosteal reaction. [citation needed] The main causes for this sign are osteosarcoma, Ewing's sarcoma, eumycetoma, and a subperiosteal abscess. [3] [4]

  5. Ewing sarcoma - Wikipedia

    en.wikipedia.org/wiki/Ewing_sarcoma

    Ewing sarcoma is a type of pediatric cancer [5] that forms in bone or soft tissue. [1] Symptoms may include swelling and pain at the site of the tumor, fever, and a bone fracture. [2]

  6. Bizarre parosteal osteochondromatous proliferation - Wikipedia

    en.wikipedia.org/wiki/Bizarre_parosteal...

    Bizarre parosteal osteochondromatous proliferation (BPOP), also known as Nora's lesion, [4] is a type of non-cancerous bone tumor belonging to the group of cartilage tumors. [1] [2] [5] It is generally seen in the tubular bones of the hands and feet, [6] where it presents with a rapidly enlarging painless lump in a finger or toe.

  7. Periosteum - Wikipedia

    en.wikipedia.org/wiki/Periosteum

    The periosteum is a membrane that covers the outer surface of all bones, [1] except at the articular surfaces (i.e. the parts within a joint space) of long bones. (At the joints of long bones the bone's outer surface is lined with "articular cartilage", a type of hyaline cartilage.)

  8. Hypertrophic osteoarthropathy - Wikipedia

    en.wikipedia.org/wiki/Hypertrophic_osteoarthropathy

    Hypertrophic osteoarthropathy is a medical condition combining clubbing and periostitis of the small hand joints, especially the distal interphalangeal joints and the metacarpophalangeal joints.

  9. ICD-10 Procedure Coding System - Wikipedia

    en.wikipedia.org/wiki/ICD-10_Procedure_Coding_System

    The ICD-10 Procedure Coding System (ICD-10-PCS) is a US system of medical classification used for procedural coding.The Centers for Medicare and Medicaid Services, the agency responsible for maintaining the inpatient procedure code set in the U.S., contracted with 3M Health Information Systems in 1995 to design and then develop a procedure classification system to replace Volume 3 of ICD-9-CM.