Please make a donation to the fibrous dysplasia foundation. In most cases, fibrous dysplasia occurs at a single site in one bone, but can occur at multiple sites in multiple bones. Areas of healthy bone are replaced with this fibrous tissue. As a result, most complications result from fracture, deformity, functional impairment, and pain. Fibrous dysplasia is a skeletal developmental anomaly of the boneforming mesenchyme that manifests as a defect in osteoblastic differentiation and maturation. Fibrous dysplasia is a relatively common disorder of bone. Polyostotic fibrous dysplasia on f18 fdg petct imaging. Fibrous dysplasia fd is a nonneoplastic tumorlike congenital process, manifested as a localized defect in osteoblastic differentiation and maturation, with the replacement of normal bone with large fibrous stroma and islands of immature woven bone. Mr imaging of monostotic fibrous dysplasia of the clivus. Acromegaly was almost always associated with skullbase fibrous dysplasia. False positive fdg petct resulting from fibrous dysplasia of.
The bone lesions may be associated with bone pain, fracture, deformity and neurologic compression. Fibrous dysplasia overview nih osteoporosis and related. Complications, and associations of fibrous dysplasia is important to ensure the accurate diagnosis and appropriate management of this disease. Fibrous dysplasia is a disorder where normal bone and marrow is replaced with fibrous tissue, resulting in formation of bone that is weak and prone to expansion. Fibrous dysplasia fd is a nonmalignant condition caused by. They have a characteristic groundglass appearance to their internal matrices. We describe the mr appearance of a case of monostotic fibrous dysplasia confined to the clivus. A yearold girl diagnosed as polyostotic fibrous dysplasia on plain radiography and histopathology presented with diffuse bone pain. May 24, 2012 fibrous dysplasia fd is a nonmalignant condition caused by postzygotic, activating mutations of the gnas gene that results in inhibition of the differentiation and proliferation of boneforming stromal cells and leads to the replacement of normal bone and marrow by fibrous tissue and woven bone. Fibrous dysplasia fd is a rare bone disease caused by postzygotic somatic. Fibrous dysplasia is a benign fibroosseous bone dysplasia that can involve single monostotic or multiple polyostotic bones. Fibrous dysplasia definition of fibrous dysplasia by. Craniofacial fibrous dysplasia is one of four types of fibrous dysplasia and is characterized, as the name suggests, by involvement of the skull and facial bones for a general discussion of the underlying pathology, refer to the parent article fibrous dysplasia.
Fibrous dysplasia article about fibrous dysplasia by the. Fibrous dysplasia fd is an uncommon skeletal disorder in which normal bone and marrow are replaced with fibroosseous tissue. Fibrous dysplasia treatment, symptoms, causes, pictures. Ct scan for fibrous dysplasia stanford health care. The replacement of normal bone in fibrous dysplasia can lead to pain, misshapen bones, and fracture, especially when it occurs in the long bones arms and legs.
Fmd has been found in nearly every arterial bed in the body although the most common arteries affected are the renal and carotid arteries. Dec 27, 2012 fibrous dysplasia of the bone fdb is a common, genetic, developmental disorder with a benign course. More than one bone can be affected at any one time. A 16yearold girl consulted for a painless swelling in the right posterior mandible for two years. It is usually asymptomatic and found incidentally on imaging studies that are performed for other. Fibrous dysplasialike appearance of the frontal process of. Fibrous dysplasia is a bone disease that replaces normal bone with fibroustype tissue. While this disease has been described in the literature under a variety of names, the one suggested by lichtenstein 1polyostotic fibrous dysplasiaappears satisfactory and has been adopted in describing the present case. Fibrous dysplasia is a developmental tumorlike disease having characteristics of replacement of normal bone by an excessively proliferated cellular fibrous connective tissue intermixed with irregular bony trabeculae 1. Fibrous dysplasia is a non inherited skeletal disorder in which boneforming cells fail to mature and produce too much fibrous or connective tissue. These tools can help your doctor better characterize the quality of bone or a fracture associated with fibrous dysplasia.
Fibrous dysplasia fd is a nonneoplastic tumorlike congenital process, manifested as a localized defect in osteoblastic differentiation and maturation, with the. Clinical guidelines for the management of craniofacial fibrous. Fibrous dysplasia genetic and rare diseases information. Fibrous dysplasia foundation helping people worldwide. This pictorial essay provides various imaging findings of fibrous dysplasia and examples of the underlying histopathology, gross intraoperative findings, and clinical characteristics.
This irregular tissue can weaken the affected bone and cause it to deform or fracture. This is a research project that all people with fdmas can join from the. Fibromuscular dysplasia fmd is a nonatherosclerotic, noninflammatory disease of the blood vessels that causes abnormal growth within the wall of an artery. This is a medical condition that disturbs the process of bone regeneration. Plain film assessment of craniofacial fibrous dysplasia may be difficult because of varying appearances and complex, overlapping structures. The lesion showed intermediate signal intensity on t2weighted images which is uncommon among clival.
Bone affected by this disorder is replaced by abnormal scarlike fibrous connective tissue. Third, several ecg and imaging criteria are prone to subjectivity. We aimed to plan an osteotomy line in orbital craniofacial fibrous dysplasia surgery using digital imaging techniques and to evaluate the treatment result. The radiologic archives of the armed forces institute of pathology. The second limitation is the lack of sensitivity of actual imaging techniques for early diagnosis in case of focal rv involvement and the lack of specificity for differential diagnosis with some other arrhythmogenic diseases involving the right ventricle. Fibrous dysplasia fd may affect single monostotic mfd or multiple polyostotic pfd bones.
It is termed as craniofacial fibrous dysplasia, when it involves, though rarely, adjacent craniofacial bones. Fibrous dysplasia nord national organization for rare. Fibrous dysplasia fd is part of a rare group of bone. The purpose of this study was to determine its prevalence and findings on ct. Five patients with unilateral craniofacial fibrous dysplasia were included in the study. However, localized fibrous dysplasia on mr imaging often mimics a tumor because fibrous tissue can enhance brilliantly after the injection of contrast material. A retrospective study of consecutive paranasal sinus ct scans was preformed on outpatients without a history of trauma or previous surgery in our hospital during 6 months.
Treatment of fibrous dysplasia orbital deformities with. Fibrous dysplasia is a bone disease characterized by abnormal differentiation of. Sep 26, 2016 preferred examination at present, angiography remains the standard imaging approach for detecting fibromuscular dysplasia arterial stenoses and aneurysms, though its role is being redefined. May 17, 2016 fibrous dysplasia of bone fd is a rare bone disease affecting one or several bones, due to a somatic mutation of gnas responsible for abnormal differentiation of the osteoblastic cell lineage. Research article biomedical research 2017 volume 28, issue 6. There are expansile, geographic, lytic lesions in the shafts of the 3rd metacarpal and proximal phalanx of the middle finger red arrows. In mccunealbright syndrome mas, fibrous dysplasia is associated with. This research was supported by the intramural research program of the. Dec 10, 2018 fibrous dysplasia accounts for about 5% of all benign bone tumors. Imaging of craniofacial fibrous dysplasia request pdf. The glen williams ossuary is a commingled sample composed of a minimum of 309 individuals from southern ontario, canada, dating to the 14th century, a. The phenotype is variable and may be isolated to a single skeletal site or multiple sites and.
Supporting research is central to the mission of the fibrous dysplasia foundation. The purpose of this study was to describe the findings of mr imaging of fibrous dysplasia and to evaluate the correlation between radiologic and pathologic findings. A clinical analysis of 72 cases yadan fan 1, jiannan liu 1, chenping zhang 1, zhiyuan zhang 1, huawei yang 2 and jingzhou hu 1. Fibrous dysplasia is categorized as either monostotic or polyostotic and may occur as a component of mccunealbright syndrome or the rare mazabraud syndrome. Fibrous dysplasia is a chronic problem in which scarlike tissue grows in place of normal bone. This tissue is not as hard as normal bone, and because it is soft and. Craniofacial fibrous dysplasia radiology reference article. Clinical guidelines for the management of craniofacial. Because many patients are asymptomatic, the true incidence of this disorder is unknown. Usually, fibrous dysplasia presents clinically in children and adolescents, with a median onset age of 8 years. Jun 30, 2017 fibrous dysplasia is a skeletal disorder that is characterized by the replacement of normal bone with fibrous bone tissue.
Computerized tomography and magnetic resonance imaging can produce crosssectional or 3d images of bone. Fibrous dysplasia childrens hospital of philadelphia chop. F18 fdg petct scan was performed to establish the extent. Fibrous dysplasia was first described by lichtenstein in 1938, and is a relatively rare benign skeletal disorder caused by defective osteoblast differentiation, abnormal fibroblast proliferation. The diagnosis of fibrous dysplasia on ct is usually straightforward 2, 3. While this disease has been described in the literature under a variety of names, the one suggested by lichtenstein 1polyostotic fibrous dysplasiaappears satisfactory and. The signal intensity of fibrous dysplasia has been reported to be low on t1weighted images. It may involve one bone monostotic or multiple bones polyostotic.
Nov 18, 2015 bulakbasi n, bozlar u, karademir i, kocaoglu m, somuncu i. Visit the patient registry page, to learn more about the fdmas patient registry. Radiography, computed tomography, and magnetic resonance imaging. Fibrous dysplasia is caused by abnormal proliferation and maturation of fibroblasts. After ct scanning, the skulls were reconstructed in 3 dimensions using analytic software. Fibrous dysplasia has a varied radiographic appearance. The distinct kinds of fibrous dysplasia are monostotic fibrous dysplasia. Fibrous dysplasia nord national organization for rare disorders.
It may affect the bones of the face and skull and, in so doing, produce a wide variety of clinical presentations. Ct and mri in the evaluation of craniospinal involvement with polyostotic fibrous dysplasia in mccunealbright syndrome. The specific cause of fibrous dysplasia is unknown, but indications are that the disease is of developmental or congenital origin. Polyostotic fibrous dysplasia fibrous dysplasia fd of bone is a rare disease often associated with severe clinical outcome, including bone pain, deformities, and fractures. Fibrous dysplasia is a skeletal disorder in which boneforming cells fail to mature and produce too much fibrous, or connective, tissue. Skeletal fibrous dysplasia is a developmental anomaly in which normal bone marrow is replaced by fibroosseous tissue. When multiple bones are affected, it is not unusual for them to all be on. Diagnostic radiologymusculoskeletal imagingtumors basic. The monostotic form is more common than the polyostotic form. This process may be localized to a single bone, or even a small segment thereof, or affect the skeleton diffusely. In some cases, a doctor may need to obtain a small bone specimen a biopsy to confirm the. This case is an example of fibrous dysplasia fd of bone in an adult male cranium. Fibrous dysplasia is a benign noncancerous bone condition in which abnormal fibrous tissue develops in place of normal bone. On imaging studies, craniofacial fd lesions are not well.
It causes normal bone to be replaced with fibrous tissue that is abnormal. Association of hearing loss and otologic outcomes with. Fibrous dysplasia is an uncommon bone disorder in which scarlike fibrous tissue develops in place of normal bone. This abnormal fibrous tissue weakens the bone, making it abnormally fragile and prone to fracture. Clinical diagnosis, imaging, and genetics of arrhythmogenic. Imaging findings of fibrous dysplasia with histopathologic. Modern imaging techniques ct or mri revealed an adenoma in 54% of the patients macroadenoma in more than twothirds. The fibrous dysplasia foundation serves people with fibrous dysplasia and mccunealbright syndrome fdmas, and related rare bone diseases like cherubism, by funding research, developing support networks, linking patients and doctors, dispersing news and information for people affected by fibrous dysplasia. Other imaging tests, such as magnetic resonance imaging mri or computed tomography ct may also be indicated. Nord gratefully acknowledges frederick singer, md, director, endocrinebone disease program, john wayne cancer institute.
It is characterized by a heavy buildup of scar tissue, also known as fibrous tissue, within your bones. Fibrous dysplasia diagnosis and treatment mayo clinic. In the future, improvement in ct imaging and software will allow for accurate. The bones in people with fibrous dysplasia have a characteristic appearance on xrays, which is usually sufficient to make the diagnosis.