Fibrous dysplasia represents about 2 5% of all bone tumors and over 7% of all benign tumors 5. Fibrous dysplasia is a congenital, nonhereditary, progressive, skeletal disorder by which normal bone is replaced by a variable amount of structurally weak fibrous and osseous tissue. Fibrous dysplasia fd is a sporadic benign skeletal disorder that can affect one bone monostotic. Key words cherubism familial multilocular cystic disease of the jaws giantcell reparative granuloma fibrous dysplasia skeletal radiol 1999 28. Fibrous dysplasia in adults basics of how fd affects bone mixture of normal and mutant cells mutant have growth advantage anything that stimulates bone growthhealing fd normal continues into adulthood fractures surgical.
For many years there has been a progressive tendency to diagnose lesions of the jaws demonstrating fibrous tissue proliferation as fibrous dysplasia. Fibrous dysplasia ma1 bone cyst, giant cell tumor, or an odontogenic tumor. Fibrous dysplasia is a rare bone disorder in which scar tissue develops in place of normal bone tissue, thereby weakening the bone. Dental college and hospital, pune, maharastra, india. Analysis of three cases durgadevi pancharethinam 1, monika chaudhary 2, ramesh venkatapathy 2, mariappan jonathan daniel 1 1 department of oral medicine and maxillofacial radiology, mahatma gandhi postgraduate institute of dental sciences, puducherry, india 2 department of oral and maxillofacial pathology, mahatma gandhi postgraduate institute of dental sciences.
It generally has affinity for maxilla over mandible in craniofacial presentation. Benign fibro osseous condition involving one or more bones of the cranial and extracranial skeleton, consists of nonencapsulated lesions which show replacement of normal bone by cellular fibrous tissues edwards 1984 originally introduced by lichtenstein in 1938 one of the most perplexing diseases of osseous tissues. This paper pays attention to the diseases that are specific for the jaws, odontogenic as well as nonodontogenic. Considerations include fibrous dysplasia, ossifying fibroma, osteoochondroma, osteoblastoma, and cementifying fibroma. 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.
Expansion and deformity of the jaw, disturbed eruption pattern of teeth are because of loss. The true incidence and prevalence of fibrous dysplasia are difficult to estimate, but the lesions are not rare. Familial fibrous dysplasia of the jaws synonyms, familial fibrous dysplasia of the jaws pronunciation, familial fibrous dysplasia of the jaws translation, english dictionary definition of familial fibrous dysplasia of the jaws. Fibrous dysplasia a report of two cases with emphasis on. Fibrous dysplasia of maxilla mccune albright syndrome jameela 12. Case report fibrous dysplasia is a benign, developmental fibroosseous bone disease which is usually recognized. Three cases of multiloculated lesion of the jaw two in the mandible and one in the maxillar closely mimicking ameloblastoma are described. Fibrous dysplasia in the jaws of a hongkong population. As children grow, affected bone may become misshapen dysplastic. The aim of this article is to represent a rare case of bilateral fibrous dysplasia of the upper and lower jaws, in combination with intellectual disability previously called mental retardation.
Sometimes, the classic clinical, radiologic or pathologic features of fibrous dysplasia or ossifying fibroma may not be evident, but overlapping features of both may be seen. Characteristic radiographic features of ossifying fibroma of the jaw bones early lesion in the left panel and late lesion in the right panel. The most common sites are the bones in the skull and face, the long bones in the arms and legs, the pelvis, and the ribs. It can occur in the bones in the front of the head andor sphenoid bones that are situated at the base of the skull.
The condition presents as a solitary lesion monostotic or with multiple foci polyostotic. Fibrous dysplasia also had equal sex predilection, and age distribution peaked in the second and third decades, with equal occurrence in both jaws. Treatment of fibrous dysplasia utilizing digital planning. Fibromuscular dysplasia fmd is a condition characterized by abnormal development or growth of cells in the walls of blood vessels arteries that can cause the vessels to narrow. Studies in clinical oral pathology associate editor lester k. Fibrous dysplasia has been regarded as a developmental skeletal disorder characterized by replacement of normal bone with benign cellular fibrous connective tissue. Monostotic fibrous dysplasia of mandible associated. Craniofacial fibrous dysplasia of the frontoorbital region. Recent trauma the most appropriate treatment of a true combined endodonticperiodontal lesion is fibrous dysplasia of the jaws the microorganisms of dental caries are 1. This page from great ormond street hospital gosh explains the causes, symptoms and treatment of fibrous dysplasia. Thus, fibrous dysplasia has become a wastebasket term for many fibrous tissue lesions that present diagnostic problems.
Many of the asymptomatic lesions are found incidentally. Fibrous dysplasia fd belongs to a group of nonhereditary benign pathologies in which immature bone and fibrous stroma replaces normal medullary bone. Fibrous dysplasia of jaws definition of fibrous dysplasia. Approximately 30% of monostotic fd mfd lesions are found in the cranial or facial bones. Various radiographic appearances of fibrous dysplasia in the. It frequently appears in the posterior region of the jaw bone and is usually unilateral. Request pdf aggressive form of fibrous dysplasia of the mandible in childhood. Fibrous dysplasia is a benign intramedullary fibroosseous lesion originally described by lichtenstein1 in 1938 and by lichtenstein and jaffe in 19422. Fibrous dysplasia may be monostotic or polyostotic, with or without associated. Radiology of multiloculated fibrous dysplasia of the jaws. Mc cune albright syndrome almost exclusively affect females.
This irregular tissue can weaken the affected bone and cause it to deform or fracture. Cherubism is a childhoodonset, autoinflammatory bone disease characterized by bilateral and symmetric proliferative fibroosseous lesions limited to the mandible and maxilla. The replacement of normal bone in fibrous dysplasia can lead to pain, misshapen bones, and fracture, especially when it occurs in the long bones. It may involve one bone or multiple bones polyostotic. Disease occurs along a broad clinical spectrum ranging from asymptomatic, incidental lesions, to severe. Fibrous dysplasia fd is a sporadic benign skeletal disorder that can affect one. Fibrous dysplasia is a tumor like developmental condition, characterised by proliferation of abnormal cellular fibrous connective tissue with irregular trabecular bone replacing the normal. Fibrous dysplasia is a skeletal disorder that is characterized by the replacement of normal bone with fibrous bone tissue. Fibrous dysplasia is a skeletal disorder in which boneforming cells fail to mature and produce too much fibrous, or connective, tissue. An important histopathologic feature for differentiating fibrous dysplasia from central ossifying fibroma the aim of this.
Features are consistent with a fibroosseous lesion such as fibrous dysplasia. Two examples are presented of osteotomies performed simultaneously with surgical recontouring in cases of fibrous dysplasia of the jaws. Fibrous dysplasia has a varied radiographic appearance. Fibrous dysplasia fd is a rare condition commonly involving the jaws. The gene for fd is located on band 20q, an area that codes for the. The mutation occurs when a baby is developing in the womb. Three percent of patients with fibrous dysplasia have mccunealbright syndrome, which includes polyostotic fibrous dysplasia, precocious puberty, and hyperpigmented maculae. Fibrous dysplasia is a developmental disorder of bone that can present in a monostotic or polyostotic form. Fibrous dysplasia nord national organization for rare. Explanations are useful to guide through learning process and confirm that the correct answer is indeed correct. Patients diagnosed with fd must be reassured that it is a benign process whereby bone has been replaced by fibrous tissue.
The exact cause of fibrous dysplasia is not known, but it is not passed down through families. Both neoplastic and nonneoplastic entities will be. In most cases, fibrous dysplasia occurs at a single site in one bone, but can occur at multiple sites in multiple bones. To compare the radiographic presentation of fibrous dysplasia in the jaws of hong kong patients with the features reported in other populations. As a result, most complications result from fracture, deformity, functional impairment, and pain. While the specific function of this protein is not well understood, it belongs to a family of proteins, called anoctamins, that act as chloride channels. Craniofacial fibrous dysplasia is 1 of 3 types of fibrous dysplasia that can affect the bones of the craniofacial complex, including the mandible and maxilla. Fibroosseous lesions of bonesfibrous dysplasia authorstream. Lesions specific for the jaws and not occurring in any other bones mostly are related to the teeth or to odontogenic tissues.
Fd involves the maxilla almost two times more often than the mandible. If this happens, it can eventually lead to deformation of facial features and affect the shape. However, it should be emphasized that cherubism is a disease histologically indistinguishable from giantcell reparative granuloma. Most people have symptoms by the time they are 30 years old. Fibrous dysplasia is a chronic disorder in which scarlike tissue grows in place of normal bone. Arteries within the brain and kidneys can also be affected. Characteristic radiological and histological patterns of. Fibrous dysplasia of the facial bones and mandible springerlink. Parekh, md, mba, rakesh donthinenirao, md, eric ricchetti, md, and richard d.
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. Boys are more often diagnosed with fibrous dysplasia than girls, except one specific type of polyostotic fibrous dysplasia mccunealbright syndrome which is more common in girls and affects the bones, skin and hormone levels. Fibrous dysplasia of the jaws is bilaterally symmetrical begins in the fifth decade is premalignant. This abnormal fibrous tissue weakens the bone, making it abnormally fragile and prone to fracture. Pdf fibrous dysplasia is a nonneoplastic skeletal disorder of unknown etiology.
Bone diseases of the jaws hindawi publishing corporation. Fibrous dysplasia is first diagnosed in infancy and childhood 7, mainly in the first and second decades 8. Fibrous dysplasia pathogenesis and histopathology youtube. Fibrous dysplasia fd is a bone developmental anomaly characterized by proliferation of fibrous tissue within. Commonly found in persons aged 315yrs polyostotic disease persons asymptomatic before 10 years.
Fibrous dysplasia fd is a benign fibroosseous lesion of the bone that rarely affects the jaws with a higher prevalence in the maxilla than the mandible. Granulation tissue which extends coronally from the pulp of a carious tooth is known as cervical radiolucency at the cementoenamel junction is most likely due to the most frequent location of a dentigerous cyst is the in fibrous dysplasia the most likely diagnosis of a proliferative lesion found at a denture periphery is aan the main purpose of. Histology showed all three to be fibrous dysplasia. This study serves to characterize the features of a large case series of fd of the jaws. Fibrous dysplasia of the jaws has been noted in a number of reports, but a clear and complete picture of its roentgen appearance in the mandible and maxilla has not emerged. Fibrous dysplasia of the jaws jama otolaryngologyhead. Integrating molecular pathogenesis with clinical, radiological, and histopathological features. The phenotype ranges from no clinical manifestations to severe mandibular and maxillary overgrowth with respiratory, vision, speech. Dentinal dysplasia is a disorder that occurs in patients with inherited fibrous dysplasia. Clinical guidelines for the management of craniofacial. Bone affected by this disorder is replaced by abnormal scarlike fibrous connective tissue. Typically, cherubism is an isolated benign condition. The radiologist should assume major responsibility forthe diagnosis, since the roentgenographic appearance of a typical case in childhood is diagnostic, whereas theclinical andpathologic features are less specific. Pathologically, fibrous tissue that is firm, rubbery, and gritty7.
Special forms of fibrous dysplasia leontiasis ossea. Symptoms of fibrous dysplasia can include bone pain, misshapen bones, and broken bones. Fibrous dysplasia represents about 2, 5% of all bone tumors and over 7% of all benign tumours. It often involves the long bones, craniofacial bones, ribs, and pelvis. Five cases of fibrous dysplasia isolated to the facial bones and mandible are presented. Based on statistics from the fibrous dysplasia foundation membership as of 2000, an incidence of one person with fibrous dysplasia out of every 15,000 30,000 people has been estimated.
Fibro osseous lesions classifications, pathophysiology and. It is a lesion of unknown etiology, uncertain pathogenesis, and diverse histopathology. By age 30 years, the facial abnormalities associated with cherubism are not usually recognizable and residual deformity of the jaws is rare. Familial fibrous dysplasia of the jaws sciencedirect.
It may either present as monostoic, affecting one bone, or polystoic, affecting many bones. Fibrous dysplasia science and education publishing. Instead of maturing into solid bone, affected bones stay at the immature fibrous stage so are weak and misshapen. Histologically, fibrous dysplasia consists of varying amounts of spindle cell bundles and trabeculae of immature woven bone. This estimate includes only people whose fibrous dysplasia causes symptoms that lead to a diagnosis using current medical technology. Monostotic fibrous dysplasia of mandible international journal of.
Gnathodiaphyseal dysplasia genetics home reference nih. Primarily affecting adolescents and young adults, it accounts for 7% of benign bone tumors. Fibrous dysplasia is an uncommon bone disorder in which scarlike fibrous tissue develops in place of normal bone. Areas of healthy bone are replaced with this fibrous tissue. In addition to fibrous dysplasia this syndrome may also lead to early puberty and skin. Monostotic fibrous dysplasia of mandible associated with an impacted.
Pdf monostotic fibrous dysplasia affecting mandible. It can be monostotic or involve multiple bones fig. Fibrous dysplasia and vision loss polyostotic fibrous dysplasia. Moreover, the jaws may harbor nonodontogenic bone lesions not seen in any other part of the skeleton. Fibrous dysplasia can be accompanied by endocrinopathies. Fibrous dysplasia, maxilla, radiographic features, swelling. Fibrous dysplasia happens when abnormal fibrous scarlike tissue replaces healthy bone. Increased levels of serum alkaline phosphatase are observed in 40% of cases of polyostotic fibrous dysplasia and, more rarely, in monostotic form.
Fibrous dysplasia overview nih osteoporosis and related. Fibrous dysplasia fd is a rare bony disorder in which normal bone is replaced by abnormal fibroosseous tissue. Aggressive form of fibrous dysplasia of the mandible in. Fibrous jaw dysplasia definition of fibrous jaw dysplasia. Request pdf peritrabecular clefting in fibrous dysplasia of the jaws. Jan 24, 2014 special forms of fibrous dysplasia leontiasis ossea. Fibrous dysplasia occurs in childhood, usually between the ages of 3 and 15.
Bilateral fibrous dysplasia of the mandible in a 7yearold. The carotid arteries, which pass through the neck and supply blood to the brain, are commonly affected. Fibrous dysplasia is linked to a problem with genes gene mutation that control boneproducing cells. Osteotomies are necessary when a coexistent discrepancy in jaw relationship is present. All that was known at the time was the characteristic swelling pattern and the increase and then regress of bone lesions. There is a female predilection in polyostotic fibrous dysplasia, and up to 50% may involve bones in the head and neck.
It is a nonneoplastic developmental hamartomatous disease of the bone, characterised by a blend of fibrous and osseous elements in the region. However, based on the clinical history and computed tomographic ct scan, the most likely diagnosis is fibrous dysplasia. The most common bones affected by this disease are skull and facial bones, thighbone, shinbone, pelvic bones, ribs, and upper arm bone. Fibrous dysplasia causes, symptoms, diagnosis, treatment. Which of the following may affect the results of electric pulp testing. Polyostotic fibrous dysplasia with this type it affects several bones and is often associated with mccunealbright syndrome, which is a genetic disorder that affects not only the bones but also many endocrine hormone producing tissues and your skin. Jones of kingston, ontario, describing a case of three siblings of the same family of jewish russian heritage. Fibrous dysplasia childrens hospital of philadelphia. Pdf monostotic and polyostotic fibrous dysplasia of the. Numerous articles with case reports have appeared in the dental litera ture on monostotic and polyostotic fibrous dysplasia of the jaws, and all these appear in adults with an xray picture suggesting a condensing osteitis, fibroosteoma, or. While fd has a typical clinical and histological presentation, considerable variation exists.
Fibrous dysplasia is a congenital present at birth condition that affects bone growth and development. The correct diagnosis is important inorder to avoid unnecessary. Aug 04, 2016 fibrous dysplasia of maxilla mccune albright syndrome jameela 12. Fibrous dysplasia usually occurs in children ages 3 to 15, but it sometimes is not diagnosed until adulthood. Monostotic fibrous dysplasia will occur more commonly at mean age of 25 years 6. A case report fibrous dysplasia is a skeletal developmental disorder of the bone forming mesenchyme that manifests as a defect in osteoblastic differentiation and maturation. Fibrous dysplasia an overview sciencedirect topics. Postzygotic somatic activating mutations in the gnas1 gene cause fibrous dysplasia and have been extensively investigated, as well as.
Fibrous dysplasia treatment, symptoms, causes, pictures. Fibrous dysplasia of right upper jaw uncommon presentation. It has now become evident that fibrous dysplasia is a genetic disease caused by somatic activating mutation of the gs. Fibrous dysplasia is a benign bone disorder characterized by the presence of fibrous tissue containing trabeculae composed of nonlamellar bone. Fibrous dysplasia jaw case contributed by dr mohammad taghi niknejad.
Fibrous dysplasia is usually found in the proximal femur, tibia, humerus, ribs, and. The commonest lesions are in the mandible and the periorbital bones. This is because the number of cases studied has usually been small or because the jaw involvement was but a part of the general disease and therefore was not presented in detail. Fibrous dysplasia fd is a fibroosseous lesion with no apparent familial, hereditary or congenital basis. Peritrabecular clefting in fibrous dysplasia of the jaws. Familial fibrous dysplasia of the jaws definition of. Cherubism was first documented and named in 1933 by dr. Monostotic disease persons asymptomatic as old as 2030 years. Lackman, md abstract fibrous dysplasia is a developmental disorder of bone that can present in a monostotic or polyostotic form. It causes bone pain, deformities, and pathological fractures. The etiology of fibrous dysplasia is not entirely clear, but there is growing evidence of a genetic mechanism.
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