Fibrous Dysplasia of Bone (Subscribe)

Author: Mark Clayer, MD, MBBS, FRACS, FAOrthA, Head of Musculoskeletal Tumor Service, Department of Orthopaedics and Trauma, Queen Elizabeth Hospital; Senior Visiting Medical Specialist, Royal Adelaide Hospital and Women's and Children's Fibrous dysplasia is a developmental dysplastic disorder of bone in which immature woven bone is formed directly from abnormal fibrous connective tissue. It is characterized by expanding fibroosseous tissue within affected bones and predominantly is a lesion ...

Author: Mahesh Kumar Neelala Anand, MBBS, DNB, FRCR, Consulting Staff, Department of Radiology, Pennine Acute Hospitals NHS Trust, Royal Oldham Hospital, Manchester, UK Background: Fibrous dysplasia is a skeletal developmental anomaly of the bone-forming mesenchyme that manifests as a defect in osteoblastic differentiation and maturation. Virtually any bone in the body can be affected. It is a nonhereditary disorder of unknown cause. Introduction Differentials Radiograph CT Scan MRI ...

Definition Fibrous dysplasia of bone,a disturbance of medullary bone maintenance in which bone undergoing physiologic lysis is replaced by abnormal proliferation of fibrous tissue, resulting in asymmetric distortion and expansion of bone; may be confined to a single bone (monostotic fibrous dysplasia) or involve multiple bones (polyostotic fibrous dysplasia).

Fibrous Dysplasia is a disease that causes growths or lesions in one (monostotic) or more (polyostotic) bones of the human body. These lesions are tumor-like growths that consist of replacement of the medullary bone with fibrous tissue, causing the expansion and fibrous dysplasia bone cysts weakening of the areas of bone involved. Especially when involving the skull or facial bones, the lesions can cause externally visible deformities. The skull is fibrous dysplasia of the skull fibrous ...

The name fibrous dysplasia was coined by Lichtenstein in 1938 to describe a disorder of expanding fibro-osseous lesions that had been referred to as fibrous osteodystrophy, osteodystrophia fibrosa and osteitis fibrosa disseminata. Its etiology is unknown; however, the most widely accepted theory is that it is a developmental abnormality of mesenchyme in which osteoblasts fail to undergo normal morphologic differentiation and maturation. The medullary cavity is filled with fibrous tissue in ...

General Discussion Fibrous dysplasia is a term that refers to either a group of chronic conditions featuring cystic bone growth that may arise from abnormal bone development or to a disease of bone marrow (medullary bone) characterized by benign cysts. Fibrous dysplasia is characterized by uneven growth, pain, brittleness, and deformity of the affected bones. This disorder may involve a single bone (monostotic fibrous dysplasia or Jaffe-Lichtenstein disease) or may affect multiple bones ...

Discussion: - results from a defect is somatic mutation in the gene coding for alpha subunit of Gs, the G protein that stimulates cAMP formation; - overproduction of cAMP, causes overexpression of c-fos, which regulates proliferation and differentiation of osteoblasts and osteoclasts; - results in lesions of bone which results in a haphazard mixture of immature fibrous tissue & small fragments of immature trabecular bone; - angular deformities may result from ...

Studies on Tissues from Patients with Fibrous Dysplasia of Bone/McCune Albright Syndrome and Other Disorders of Calcified Tissues Summary: This study will investigate how a gene mutation (change in DNA) causes the abnormal bone in fibrous dysplasia-a condition in which areas of normal bone are replaced with a fibrous growth similar to a scar. The bone abnormalities in fibrous dysplasia can occur in a single bone (monostotic fibrous dysplasia), multiple bones (polyostotic fibrous dysplasia), ...

Diagnostic Radiology/Musculoskeletal Imaging/Tumors Basic/Fibrous dyplasia From Wikibooks, the open-content textbooks collection Fibrous dysplasia is a benign, developmental anomaly of the bone-forming mesenchyme in which the medullary cavity is replaced with fibrous material, woven bone, and spindle cells. Virtually any bone in the body can be affected. It is a nonhereditary disorder of unknown cause. Fibrous dysplasia does not spread or proliferate, and malignant transformation is rare ...

Pictorial Essay AJR 2004; 182:1389-1398 Imaging Findings of Fibrous Dysplasia with Histopathologic and Intraoperative Correlation Kimberly A. Fitzpatrick1, Mihra S. Taljanovic1, Donald P. Speer2, Anna R. Graham3, Jon A. Jacobson4, George R. Barnes1 and Tim B. Hunter1 1 Department of Radiology, University of Arizona College of Medicine, 1501 N Campbell Ave., PO Box 245067, Tucson, AZ 85724-5067. 2 Department of Orthopaedic Surgery, University of Arizona College of Medicine, Tucson, AZ. ...

fibrous dysplasia

fibrous dysplasia