Fibrous dysplasia ground glass appearance

The appearance of fibrous dysplasia is usually smooth and homogeneous with endosteal scalloping and cortical thinning 12. The borders are well defined and the cortex is usually intact but thinned due to the expansive nature of the lesion 12 Radiographically, fibrous dysplasia appears as a well circumscribed lesion in a long bone with a ground glass or hazy appearance of the matrix. There is a narrow zone of transition and no periosteal reaction or soft tissue mass. The lesions are normally located in the metaphysis or diaphysis These entities exhibited a pagetoid appearance (type I) in 37 (72.5%), a ground-glass appearance (type II) in 8 (15.7%), and a cyst-like appearance (type III) in 6 (11.8%) patients on CT. The FD-like appearance of the frontal process of the maxilla is not rare and can be readily detected by CT. FD : fibrous dysplasia

Fibrous dysplasia Radiology Reference Article

  1. eralized bone to fibrous tissue in any given lesion
  2. The most common appearance of fibrous dysplasia on CT is an expanded bone showing a ground-glass appearance (Fig. 1A, 1B, 1C, 1D, 1E). The diagnosis of fibrous dysplasia on CT is usually straightforward [ 2, 3 ]
  3. Classically, fibrous dysplasia lesions are intramedullary, expansile, and well defined (Fig. 1A, 1B, 1C, 1D, 1E). Although endosteal scalloping may be present, a smooth cortical contour is always maintained. Lesions show varying degrees of hazy density with a ground-glass quality, although some may appear almost completely radiolucent or sclerotic
  4. eralization), they are characterized by do
  5. b Humeral X-ray demonstrating characteristic features of fibrous dysplasia, including homogenous ground glass appearance and cortical thinning. Bowing has occurred at a previously fractured site in the midshaft (red arrowhead)

Image shows homogeneous loss of the normal trabecular pattern in the shaft of the humerus, with a ground-glass appearance caused by fibrous dysplasia Key words: Fibrous dysplasia, ground glass appearance, maxilla INTRODUCTION Fibrous dysplasia (FD) is a benign fibro-osseous pathologic condition characterized by the replacement of bone with fibrous tissue. This disorder was first discovered by Lichtenstein in 1938, who later collaborated with Jaffe in 194 Computerized tomography head scan revealed an expansile clivus with a ground-glass appearance, magnetic resonance imaging brain scan revealed a predominantly hypointense signal on T1- and T2-weighted images and subsequent whole-body bone imaging confirmed the diagnosis of monostotic clival fibrous dysplasia The radiopaque areas had homogenous ground glass appearance. There is a loss of bone trabeculation, thinning of the cortical boundaries but still intact, and a loss of the lamina dura around the right posterior permanent teeth. The radiographical features of the lesion were indicative of fibrous dysplasia in the maxilla

Fibrous Dysplasia BoneTumor

• Milk cloud appearance correlates well with the radiographic or CT finding of ground-glass appearance. • Recognition of milk cloud appearance on contrast-enhanced MR imaging may be helpful when radiographs are equivocal or unremarkable or when MR imaging is performed as the primary imaging modality in cases of fibrous dysplasia The characteristic appearance of early FD is a cystic or sclerotic (ground glass) appearance in the frontal, maxillary, or sphenoid bone with smooth cortical margins. [4] As these lesions progress, they have more of a pagetoid pattern with alternating fibrous stroma and osseous change.[4 X-rays and other tests will help your doctor confirm the diagnosis of fibrous dysplasia or determine the extent of the disorder. X-rays. X-rays provide images of dense structures such as bone. In a patient with fibrous dysplasia, an x-ray may show: An abnormal area of bone that has an appearance similar to that of ground glass

On x-ray, fibrous dysplasia appears as bubbly lytic lesions, or a ground glass appearance. Computerized tomography (CT) or magnetic resonance imaging (MRI) scans may be used to determine how extensively bones are affected described ground-glass appearance.(1). In 1937, McCune and Bruch first suggested that among all of the abnormalities of bone formation, this disorder should have its own place as a distinct clinical entity. The following year, Lichtenstein introduced the term fibrous dysplasia Reed's definition states that fibrous dysplasia is a Fig. 1. AP plain x-ray of fibrous dysplasia of the right shoulder showing an expanded lytic lesion involving the spine of the scapula. Fig. 2. Axial CT reconstruction of the shoulder illustrates a lytic lesion of the right scapula consistent with fibrous dysplasia. There is a ground glass appearance. Fig. 3 FIBROUS DYSPLASIA — CHOURMOUZI et al 379 ground-glass appearance. The density of the lesion was 40 HU that was less than the usually reported density of 300-600 HU of cranio- facial FD. A central sclerotic area was seen as well. The lesion extended to - ward the orbital roof and ethmoid sinuses, had well-defined lobulate The lesions of monostotic fibrous dysplasia are usually radiolucent, often having a loculated or trabeculated appearance. Scattered throughout the fibrous lesion, there is an appearance of radiopacity. This represents the classic ground glass or smoky appearance of bone. This also represents a base matrix of fibrous tissue with scattered.

Fibrous dysplasia (FD) A. Proximal femur FD demonstrating the typical ground-glass appearance with a coxa vara (shepherd's crook) deformity B. Three-dimensional reconstructed computed tomography (CT) image of a man age 26 years with craniofacial FD and uncontrolled growth hormone excess, leading to macrocephaly and severe facial deformit Figure 1: Axial CT scan showing the ground glass appearance of the fibrous dysplasia. MRI was performed, which showed a clinical finding consistent with FD with expansion of the base of the skull Global Journal of Otolaryngology ISSN 2474-7556 Fibrous Dysplasia of Ethmoid: A Case report Abstrac Orange peel/ground glass appearance. 2. Opacification of the antrum. 3. Radiolucent lesion of the mandible. 4. Varying degree of opacification (not ground glass and not orange peel). Figures 5 and 6 show the radiographic appearance of two cases of fibrous dysplasia. Surprisingly, Cases 4 and 10, female patients aged 29 and 47 respectively.

Diseases of bone manifested in the jaws

21 year old man with fibrous dysplasia in a lumbar vertebral body with secondary aneurysmal bone cyst-like change (Clin Pathol 2019;12:2632010X19861109) 30 year old man with fibrous dysplasia in the calcaneus (Foot Ankle Spec 2017;10:72) 62 year old man with angiosarcoma arising in fibrous dysplasia after radiation therapy (Oral Radiol 2019 Jul 31 [Epub ahead of print] Ground Glass appearance is a characteristic appearance on plain radiograph. Histopathologically fibrous component is relatively avascular, composed of cytologically bland spindle cells with few trabecular structures. The management ranges from watchful observation to surgical intervention. Fibrous Dysplasia even though has good prognosis. Fibrous dysplasia/McCune-Albright syndrome (FD/MAS; OMIM#174800) is a rare disorder characterized by skeletal lesions, skin hyperpigmentation, and hyper-functioning endocrinopathies [1, 2].It arises from post-zygotic gain-of-function mutations in the GNAS gene, which encodes the α-subunit of the G s signalling protein [].These mutations disrupt the intrinsic GTPase activity of G s α, leading.

Fibrous dysplasia has certain CT characteristics with the ground glass appearance being the most common persistent feature [6,7]. The disease may also present in a homogeneously dense pattern or with a cystic appearance . In MRI, the lesion shows iso-to hypo-intensity in T1 imaging with more variable presentations in T2 Ground-glass appearance of the bone matrix is a characteristic feature of fibrous dysplasia. Tehranzadeh et al. ( 19 ) compared fibrous dysplasia with Paget's disease of the skull using CT imaging. Ground-glass appearance, absence of cortical thickening, involvement of the paranasal sinuses and asymmetric findings were the specific features of.

Fibrous Dysplasia-Like Appearance of the Frontal Process

Fibrous dysplasia is primarily a radiographic diagnosis that rarely needs a confirmatory imaging study. Like Paget's disease, the finding is often incidental, and the diagnosis is presumptive. The radiographic features are varied and include a variety of patterns that may be lucent, sclerotic, mixed, or resembling ground glass ground glass appearance: A descriptor for a homogenous translucency in radiology, microbiology, or histology, which may obscure cellular detail, equivalent to German milchglassartig Bacteriology The ground glass appearance (GGA) refers to a shadowy pattern seen on culture plates that is midway between the greenish hue of alpha haemolysis, and.

Fibrous dysplasia (polyostotic form) | Image | Radiopaedia

Fibrous dysplasia (FD) is a type of hamartoma, wherein the medullary bone is replaced by immature and poorly calci- typical ground-glass appearance of the trabecular bone with generalized loss of the lamina dura and narrowing of the peri-odontal ligament space. Occlusal radiographs revealed expan Rare variant of fibrous dysplasia characterized by fibroosseoeus components and extensive calcifications with proximal femoral predilection of disease; May be misinterpreted as a cartilaginous neoplasm; ± pathological fx; Ground glass appearance but with calcification

Most commonly, fibrous dysplasia lesions initially demonstrate a purely lytic appearance and then develop a hazy or ground glass appearance as the matrix calcifies. [jaocr.org Polyostotic fibrous dysplasia is seen in the radius in this child. Parts of this lesion have a hazy, ground-glass appearance, whereas others are more lytic appearing. A hazy, ground-glass appearance is often present in fibrous dysplasia, but just as often, the appearance can be purely lytic or even sclerotic

Fibrous dysplasia (FD) is a rare bony disorder in which normal bone is replaced by abnormal fibro-osseous tissue. It often involves the long bones, craniofacial bones, ribs, and pelvis. Radiographic examination revealed a lesion with both radiopaque and radiolucent features showing a ground-glass appearance from the mesial side of the. Osseous expansion with ground glass appearance usually attenuates at from 60-140 HU 2. Intramuscular myxomas appear as well-demarcated hypodense ovoid lesions close to areas of fibrous dysplasia and usually show mild diffuse enhancement or peripheral and septal enhancement seen in approximately 50% of cases 9. MR Fibrous dysplasia is a benign fibro-osseous lesion, which may present in either monostotic or polyostotic forms. 1,2 The monostotic form occurs most frequently and represents approximately 75% of FD cases. This form occurs, in decreasing order of frequency, in the craniofacial bones, ribs, femurs, tibias, and humeri The most common radiographic pattern observed was the ground-glass appearance. Most of the patients exhibited expansion of the involved bone and loss of lamina dura of associated teeth. CONCLUSION: The awareness of protean features of fibrous dysplasia evident through this study is essential in the accurate diagnosis and proper treatment. A ground-glass appearance on CT scans, thinning of the cortical bone, and ballooning of the affected area are the hallmarks of fibrous dysplasia (3, 8). This seemed to be true in cases of fibrous dysplasia affecting the clivus: all lesions had a ground-glass appearance, and one had a cyst accompanying the ground-glass changes

Fibrous Dysplasia . originally described by Lichtenstein in 1938 and by Lichtenstein and Jaffe in 1942; Radiolucent cystic areas, which are expansile with deep endosteal scalloping and 'ground glass appearance' or 'shower door glass appearance' in the metaphysis or shaft with medullary calcification The primary tool for diagnosis of fibrous dysplasia is an X-ray. While bone appears solid in an X-ray, a fibrous dysplasia lesion has a relative distinct appearance often described as ground glass. The condition may be diagnosed, therefore, even in a person with no symptoms who is getting an X-ray for other reasons

Fibrous dysplasia is most commonly diagnosed on imaging studies where it usually shows as ground glass, with alternating dense sclerotic and radiolucent fibrotic areas (pagetoid fibrous dysplasia). Alternate but less usual radiographic presentations are sclerotic fibrous dysplasia, with dense homogenous areas, and cystic fibrous dysplasia, with. In fibrous dysplasia there are characteristic changes in the blood chemistry foci of cartilage are a common histological finding a ground-glass appearance is present on radiographs an inflammatory infiltrate is characteristically present. 0 explanations A ground-glass appearance on radiography, though characteristic of fibrous dysplasia, is not pathognomonic. The authors recommended that histologic examination or follow-up imaging be conducted in cases of suspected fibrous dysplasia Radiographically, fibrous dysplasia appears as a well circumscribed lesion in a long bone with a ground glass (ground-glass appearance) or hazy appearance of the matrix. On imaging studies, the lesion is usually well defined, although the rim is not usually sclerotic, and the tissue often has a ground-glass appearance owing to the finely. Diagnosis of Fibrous Dysplasia. The initial test recommended in a suspected case fibrous dysplasia is X-ray which shows characteristic mottling and sclerotic changes with a ground-glass appearance. Computed Tomography clearly shows cystic and sclerotic lesions with smooth cortical margins and no soft tissue involvement. MRI shows low to.

Homogenous ground glass ossification is a typical finding in fibrous dysplasia and may be combined with fibrous, lytic areas. Fibrous dysplasia is characterised by a poorly delineated transition zone to the adjacent bone, whereas ossifying fibroma shows sharply delineated margins resulting from expansive growth Fibrous dysplasia (FD) and aneurysmal bone cyst (ABC) are uncommon non-neoplastic intraosseous lesions, and the occurrence of concomitant FD and ABC is extremely rare. An 11-year-old boy presented with gradual progressive enlargement of his right zygomatic bone over 4 years prior to presentation. Computed tomography revealed a lesion with a central bony area showing a ground-glass appearance. Fibrous dysplasia (FD) is a type of hamartoma, wherein the medullary bone is replaced by immature and poorly calcified bone. 1,2 FD comprises 2-5% of all bone tumors and 7% of benign tumors. 3,4 FD is caused by an imbalance between osteoblastic and osteoclastic activities. 5,6 Monostotic FD (MFD) is the most common form of FD, and is unilateral in nature. 7 It is more commonly observed in females they tend to be more lucent than fibrous dysplasia fracture. Within a rib, fibrous dysplasia causes fu-siform enlargement and may have a multiseptated appearance (1,3). CT is the best technique for characterizing fibrous dysplasia. The sclerotic margin of the lesion is easily visualized and the cortical detail is superior to that of radiographs

DENTIN INBDE STUDY GUIDE (2020-2021) 216 • Radiographic: when mature it has a radiopaque GROUND-GLASS appearance (diffuse/not well-defined, mixed radiopaque-radiolucent areas). MAIN CHARACTERISTIC is you never see the lesion's borders (it blends with the bone). THREE TYPES OF FIBROUS DYSPLASIA: 1. Monostotic Fibrous Dysplasia-the most common form of fibrous dysplasia (80%) that. To evaluate contrast-enhanced T1-weighted magnetic resonance (MR) images in histologically proven fibrous dysplasia (FD) for the prevalence of milk cloud appearance and its association with ground-glass appearance (GGA) on radiography or computed tomography (CT). For this retrospective cohort study, 37 patients with histologically proven FD imaged preoperatively with contrast-enhanced MR. The surgical management of Polyostotic Fibrous Dysplasia (FD) of bone is technically demanding. The most effective methods to manage the associated bone deformity remain unclear. The marked variation in the degree and pattern of bone involvement has made it difficult to acquire data to guide the surgeon's approach to these patients. In light of the paucity of data, but need for guidance. Fibrous dysplasia was considered in differential diagnosis. Intraoral periapical radiographic (IOPA) examination revealed radiolucency involving enamel, dentin, and pulp in relation to upper right posterior deciduous teeth and erupting premolars periapically. The trabecular pattern showed ground-glass appearance (Figure 2(a)). The maxillary.

Fibrous Dysplasia - EyeWik

Fibrous dysplasia is best understood as a dysplastic anomaly of bone-forming mesenchymal tissue [1].The hallmark of the disease is an inability of bone-forming tissue to produce mature lamellar bone and an arrest at the level of woven bone [1].Monostotic fibrous dysplasia (MFD) has been well documented in rib, skull, jaw bones, femur and tibia 3 cm, ground glass-like opacity in the lower mandible. Based on this characteristic appearance, a tentative diagnosis of fibrous dysplasia was made. A sample biopsy under local anesthesia was taken via a marginal mucoperiosteal flap to confirm the findings. Since the patient desired a described ground-glass appearance.(1). In 1937, McCune and Bruch first suggested that among all of the abnormalities of bone formation, this disorder should have its own place as a distinct clinical entity. The following year, Lichtenstein introduced the term fibrous dysplasia Reed's definition states that fibrous dysplasia is a The next step would be x-ray. On a plain x-ray film, the bone with fibrous dysplasia can look to have a ground glass appearance. Ground Glass Appearance Computed tomography (CT) can show us an excellent view of the bone with fibrous dysplasia because of its cross-sectional view of anatomy. CT scan shows the left temporal bone disorde The ground glass appearance results from the sclerotic dysplastic bone-like material and the radiolucent fibrous component of the lesion [29, 30]. A highly characteristic radiographic feature is bucco-lingual expansion with thinning of the cortical plate [ 3 , 17 , 23 , 30 , 31 , 32 ]

Fibrous dysplasia: base of skull | Image | Radiopaedia

Usually, the matrix of the lucency is smooth and relatively homogeneous; classically, this finding is described as a ground-glass appearance. Irregular areas of sclerosis may be present with or without calcification. The lucent lesion has a thick sclerotic border and is called the rind sign. The exact cause of fibrous dysplasia. is not. While bone appears solid in an X-ray, a fibrous dysplasia lesion has a relative distinct appearance often described as ground glass. The condition may be diagnosed, therefore, even in a person with no symptoms who is getting an X-ray for other reasons Fibrous dysplasia is a developmental anomaly in which normal bone is replaced with fibrous connective tissue. As a ground glass appearance.2 In fibrous dysplasia of the mandible, the mandibular canal may be displaced either inferiorly or superiorly. Petrikowski and others6 suggeste

Fibrous Dysplasia Involving the Base of the Skull

The bone of the left side of the skull and face, also involving crista galli and the mandible, is expanded with a characteristic ground-glass sclerotic appearance, typical of fibrous dysplasia. Vaguely seen is an expansion of the pituitary region and a pituitary mass, most likely a macroadenoma. From the case: Fibrous dysplasia - base of skull Fibrous Dysplasia may resemble other benign lesions and have a wildly varying appearance. The generally well-defined character of the lesion, along with a lack of periosteal reaction in an otherwise asymptomatic lesion, may be good clues to its true nature. References. Yochum T.R., Rowe L.J.: Essentials of Skeletal Radiology, ed 3

Comments: Radiologic features of fibrous dysplasia: The affected bone is usually expanded.The lesion is well-circumscribed, lytic or ground-glass like in density (on plain radiographs) in a metaphyseal or diaphyseal location. It may have multiloculated appearance due to endosteal scalloping. It is often surrounded by a thick layer of reactive sclerotic bone (rind sign) ground glass: ( grownd glas ) Descriptive of an opacity in radiologic imaging that may indicate various disease states Ground glass density. Q. 2 . McCune-Albright syndrome is a rare syndrome characterized by fibrous dysplasia (a type of bony defect), café-au-lait skin pigmentation (also seen in neurofibromatosis), and autonomous endocrine hyperfunction. Ground-glass appearance The most common appearance of fibrous dysplasia is a ground glass appearance (56%), the others homogeneously dense pattern (23%), and cystic variety (21%) (8). In our case, CBCT images showed expansive mass at ground-glass appearance with maxillary sinus expansion. Certain diagnosis of fibrous dysplasia is made by histopathological examination Fibrous dysplasia (FD) is a developmental fibro-osseous lesion characterized by substitution of normal bone by proliferating fibrous tissue and irregular woven (immature) bone.; FD, apart from having bone lesions can also be associated with skin and endocrine abnormalities

Polyostotic fibrous dysplasia is more frequently monomelic, polyostotic monomelic fibrous dysplasia - involving homolateral lower limbs and ilium. The more severe cases are polymelic. Spine is an infrequent location, more frequently associated with the polyostotic form. The lesion has a ground-glass-like or lytic appearance. The. Fibrous dysplasia is an idiopathic skeletal disorder in which medullar bone is replaced by poorly organized, structurally unsound fibro-osseous tissue . Radiologically, FD is characterized by expansive lesions with endosteal scalloping, thin cortex, and an intramedullary tissue matrix showing a ground class appearance Fibrous dysplasia (6) On the left images of a patient with polyostotic FD. On the far left a well-defined lytic lesion with groundglass appearance in the proximal femur diaphysis, consistent with fibrous dysplasia. T2-weighted MR image with FS reveals cytic degeneration of the fibrous dysplasia, which is a common finding Clival involvement in monostotic fibrous dysplasia may not be as rare as previously thought. Clival fibrous dysplasia commonly presents with headache. The radiographic findings within the clivus are classic for fibrous dysplasia including ground glass appearance on CT and hypointense lesion on T1 and T2 MRI

Imaging Findings of Fibrous Dysplasia with Histopathologic

Introduction Fibrous dysplasia is a formative tumor-like Etiology, genetics, and molecular Biology condition that is portrayed by substitution of ordinary The basic reason for FD is not completely caught on. bone by an excessive expansion of fibrous connective Scientists trust that the lesions are created by a mutation tissue intermixed with. Figure 4: Panoramic radiograph shows a massive, radiopaque lesion which has ground glass appearance in the left side of maxilla that involves maxillary sinus and floor of the orbit. - Monostotic Fibrous Dysplasia: A Case Repor

Radiopaque Jaw Lesions: An Approach to the Differential

CT scan helps in differentiating fibrous dysplasia from other osteodystrophic lesions of the skull base, like otosclerosis, osteogenesis imperfecta, Paget disease, and osteopetrosis. Diagnostic characteristics of fibrous dysplasia on CT are ground-glass appearance and the presence of cyst like changes FIBROUS DYSPLASIA. Pathology: Anomaly of bone-forming mesenchyme in which osteoblasts do not undergo usual differentiation and maturation. Histologically, medullary cavity is replaced by myxofibrous tissue and woven bone trabeculae which contain spindle cells and fluid-filled cavities. Multiple forms including monostotic, polyostotic.

Best practice management guidelines for fibrous dysplasia

Skull fibrous dysplasia (FD) is a rare, slow-growing tumor, which mostly arises from frontal region. It is either monostotic, involving single bone, or polyostotic, involving more than 1 bone. FD can be ground glass (most common appearance), sclerotic, or cystic on CT. CT image gives estimation of bony involvement, free bony margins, extent. Fibrous dysplasia (FD) is a condition in which normal bone marrow is replaced by an abnormal proliferation of new fibrous connective tissue. Female patient, white, 20 years old, attended the dental clinic reporting a slow increase in volume in the right mandible region over the last 5 years. She was examined by imaging: the panoramic X-ray revealed a lesion with the appearance of ground glass. Fibrous dysplasia (FD) is a benign medullary fibro-osseous lesion composed of varying proportions of fibrous tissue and immature woven bone. It occurs in both children and adults without a race or sex predilection [ 1 , 2 ]. Common sites of Fibrous dysplasia is a bone disorder of unknown ori-gin characterized by slow, progressive replacement (1). It is clear that CT is invaluable for the assessment of extensive lesions, especially those affecting the anatomically com-plex maxilla (4). CT scan will demonstrate a classic hetero-geneous ground glass appearance with calcifications. Ar appearance on plain radiographs. This is due to the rela-tively greater degree of mineralization of FD tissue in the craniofacial bones (Fig. 3) [33]. Computed tomography (CT) scanning is the best technique for imaging FD lesions in the skull, revealing a ground glass appear-Radiographic appearance of fibrous dysplasia (FD)Figure

Fibrous Dysplasia Imaging: Practice Essentials

Fibrous dysplasia (FD) Left frontal bone was protruding and extraordinarily thick on computed tomography causing facial asymmetry with ground-glass appearance (Figure 1). In a multidisciplinary approach, the surgery was performed by the neurosurgery and oral maxillo-facial surgery team. Surgery for removal of her left forehead FD and. These show lower Hounsfield units (O to 40), compared to fibrous dysplasia (70 to 130). Few studies other than plain X-rays are required in a typical case of polyostotic disease. MICROSCOPIC APPEARANCE: Fibrous dysplasia is composed of fibrous stroma with normal appearing nuclei and irregular shaped strands of osteoid and bone Study Fibrous Dysplasia and Paget's disease flashcards from Artie Monaco's National University of Health Sciences class online, or in Brainscape's iPhone or Android app. Learn faster with spaced repetition Fibrous dysplasia can be differentiated on the basis of several characteristics. Generally, it occurs in patients older than 10 years, more commonly affects the femur and ribs, and does not resolve spontaneously. [] Radiographically, it appears as an intramedullary lesion with a ground-glass appearance. [] On histologic examination, fibrous dysplasia is not bordered by active osteoblasts and.

Pathology of the Jaw: The Importance of Radiographs | jcda

However, the diagnostic gold standard for any disease is histopathology, but in the case of craniomaxillofacial fibrous dysplasia, many authors have claimed that radiography and CT play a remarkable role in diagnosis, treatment planning, and in follow-up of the case. 3 Radiographically, ground glass appearance is seen with no visible trabecular. The 'ground glass' appearance was pathognomonic of fibrous dysplasia alternating with hyperdense areas and suggestive of osteoma. Fig. 1 Photograph showing gross frontal deformity and left proptosis caused by massive frontal sinus osteoma Monostotic fibrous dysplasia may be completely asymptomatic and is often an incidental finding on x-ray. Radio graphically, the characteristic appearance of fibrous dysplasia vary widely, it include a ground glass appearance, expansion of bone and sclerosis surrounding the lesion [5]