1/10. Cochleo-vestibular manifestations of jugular foramen pathologies.patients presenting pathologies of the jugular foramen are presented, for whom the main symptoms are of cochleo-vestibular nature. A classification of the various pathologies is attempted, the anatomy reviewed and hypotheses capable of producing the symptom elaborated.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
2/10. Appearances of choroidal osteomas with diagnostic imaging.The diagnostic imaging appearances of three choroidal osteomas (osseous choristomas) are presented. This rare, benign choroidal tumour is being recognized with increasing frequency, and is important to remember in the differential diagnosis of any unusual mass in the ocular fundus lest it be mistaken for a more sinister lesion. All three osteomas were demonstrated by ocular ultrasound (US), fluorescein angiography (FA) and computed tomography (CT) but none by plain radiography. None of the lesions was visible on magnetic resonance imaging (MRI); the reason for this is probably the bony nature of the tumours. The appearances of choroidal osteomas on US, FA, plain radiography and CT are discussed. To our knowledge this is the first report of a series of choroidal osteomas investigated by MR.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
3/10. Peripheral osteoma of the maxilla: report of an unusual case.Peripheral osteomas of the maxilla are relatively rare. A case of a solitary peripheral osteoma of the anterior right maxilla in a 16-year-old girl is presented. The tumor was asymptomatic and was removed via an intraoral approach without any complications. Both hamartomatous and neoplastic factors have been advocated concerning the pathogenesis of such lesions, but no definite conclusion has been reported. Certain features of the case, such as obstruction of the eruption of the permanent canine, displacement of an adjacent tooth, intraoperatively noted infiltration of the interdental bone, and clearly abnormal histological bone structure might support the neoplastic nature of this lesion.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
4/10. Choroidal osteoma: evidence of progression and decalcification over 20 years.Choroidal osteoma is a rare, benign, ossifying tumour of the choroid of unknown aetiology. In contrast to other types of intraocular ossification, choroidal osteoma is found typically in young healthy females in the second or third decades of life with no history of systemic or ocular disease. Choroidal osteoma is a deep, pale yellow lesion with distinct geographic borders at the juxtapapillary or macular region, with branching 'spider' vessels on the surface of the tumour. These features should help differentiate choroidal osteoma from other types of intraocular tumour and the diagnosis can be confirmed with ultrasonography and computerised tomography. Here we report an initially unilateral case of choroidal osteoma, which decalcified over 20 years but during the same period the fellow eye also developed a choroidal osteoma to become a bilateral case. Despite the benign nature of the tumour, vision may be compromised by gradual atrophy of the overlying retina, serous retinal detachment, accumulation of sub-retinal fluid and sub-retinal haemorrhage associated with choroidal neovascularisation. Frequent examinations are recommended for patients with choroidal osteoma, for early detection of a subretinal neovascular membrane and potential treatment with laser photocoagulation.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
5/10. Slowly enlarging pedunculated mass on the edentulous maxillary alveolar ridge.Peripheral ossifying fibroma is a fairly common, benign, reactive lesion that should be included in the differential diagnosis of slow-growing, nonaggressive tumors arising in the tooth-bearing areas of the jaws. The variations in terms and descriptions may require that the clinician communicate with the pathologist to determine the true nature of the lesion. Although peripheral ossifying fibroma is a benign, reactive lesion, the recurrence rate is fairly high and postoperative follow-up is needed.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
6/10. The 'hybrid' fibro-osseous lesion.A hitherto unreported 'hybrid' fibro-osseous lesion involving the nasal cavity and sinuses is reported. This lesion histologically demonstrated features of ossifying fibroma, cementifying fibroma and aneurysmal cyst. Whilst appearing benign in nature it behaved in a neoplastic manner which necessitated complete surgical excision. A combined clinical, radiological and histopathological approach is advocated and discussed in relation to the treatment of these lesions.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
7/10. Choroidal osteomas.Two cases of choroidal osteoma (one bilateral) are reported, bringing the total number of cases in the English-language literature to 18; an additional 7 cases are known to the authors. This tumour, first described in 1978, arises in the inner third of the juxtapapillary choroid and consists of mature bone; it is likely an osseous choristoma. It transmits light in an unusual manner, small lacunae glowing with sclerotic scatter. If the bony plaque is peripheral its solid nature can be identified with scleral depression. Computerized tomography readily demonstrates the calcification and the pattern of bone density.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
8/10. Congenital primary cutaneous osteoma: biochemical and histological studies.Biopsies of a cutaneous osteoma and of normal-looking skin from a 1-year-old girl were studied for histological appearance and collagen biochemistry. The mineralized tissue contained a matrix similar to bone: Only type I collagen, with a hydroxylysine content (0.48%) higher than in the skin (0.35%) and dihydroxylysinonorleucine as the major reducible crosslink. As expected, the normal skin adjacent to the lesions contained type I and type III collagen and as major crosslinks hydroxylysinonorleucine and histidinohydroxymerodesmosine. Histological studies showed the presence of woven bone with very little trabeculation. Numerous active osteoblasts were laying down a rapidly calcified non-lamellar matrix. osteocytes and multinucleated osteoclasts were also noted. The study demonstrates the osseous nature of the lesion and suggests that an abnormal cell differentiation is associated with this form of osteoma.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
9/10. Use of surgical laser in the removal of an osteoma of the skull.The laser beam can be adapted for use as a surgical cutting instrument. It was chosen for this purpose in the extirpation of an osteoma of the skull. Its removal by conventional means was believed to be too dangerous, because of surrounding vascularity. The nature and properties of the beam and its surgical applications are discussed briefly.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
10/10. osteoma of the promontory: a case report.Osteomas of the middle ear are rare lesions. We report the case of a 20-year-old male with osteoma originating from the promontory coincident with tympanic membrane perforation. Histopathological diagnosis was performed by means of a superficial curettage during surgery, to avoid a cochlear fenestration. Postoperative closure of the air-bone gap after myringoplasty confirmed the presumed asymptomatic nature of these lesions.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
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