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infection in the bone leads to an increase in intramedullary pressure due to inflammatory exudates; the periosteum becomes stripped from the ostium, leading to vascular thrombosis; bone necrosis follows due to lack of blood supply; sequestra are formed; The sequestra are surrounded by sclerotic bone which is relatively avascular (without a ...
Systemic scleroderma, or systemic sclerosis, is an autoimmune rheumatic disease characterised by excessive production and accumulation of collagen, called fibrosis, in the skin and internal organs and by injuries to small arteries. There are two major subgroups of systemic sclerosis based on the extent of skin involvement: limited and diffuse ...
The spleen is an important organ in regard to immunological function due to its ability to efficiently destroy encapsulated bacteria. Therefore, removal of the spleen runs the risk of overwhelming post-splenectomy infection , a medical emergency and rapidly fatal disease caused by the inability of the body's immune system to properly fight ...
Osteosclerosis is a disorder characterized by abnormal hardening of bone and an elevation in bone density. It may predominantly affect the medullary portion and/or cortex of bone. Plain radiographs are a valuable tool for detecting and classifying osteosclerotic disorders. [1] [2] It can manifest in localized or generalized osteosclerosis.
Avascular necrosis (AVN), also called osteonecrosis or bone infarction, is death of bone tissue due to interruption of the blood supply. [1] Early on, there may be no symptoms. [1] Gradually joint pain may develop, which may limit the person's ability to move. [1] Complications may include collapse of the bone or nearby joint surface. [1]
Tissue transplantation is a surgical procedure involving the removal of tissue from a donor site or the creation of new tissue, followed by tissue transfer to the recipient site. [ 1 ] [ 2 ] The aim of tissue transplantation is to repair or replace tissues that are missing, damaged, or diseased, thereby improving patients' survival ...
The bone hypercellularity may then diminish, leaving a dense "pagetic bone", also known as burned-out Paget's disease. A later phase of the disease is characterized by the replacement of normal bone marrow with highly vascular fibrous tissue. [25] Sir James Paget first suggested the disease was due to an inflammatory process.
The resulting new bone is often called an involucrum. [13] On histologic examination, these areas of necrotic bone are the basis for distinguishing between acute osteomyelitis and chronic osteomyelitis. Osteomyelitis is an infective process that encompasses all of the bone (osseous) components, including the bone marrow.