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Biomedical subjects

Y Ramon

Publications and source records attributed to Y Ramon.

At least 19 recordsLinked to original sources
PubMed1991

[Immediate breast reconstruction with tissue expander].

The technique of immediate breast reconstruction, using the tissue expander and replacing it with a permanent silicone prosthesis, has been applied with increasing frequency during the past several years. We chose this technique for immediate breast reconstruction because of its simplicity, rapidity when combined with mastectomy, and good esthetic results. We have performed 29 immediate breast reconstructions in the past 1.5 years in patients ranging from 22 to 72 years (mean 47). The insertion of the tissue expander added only 20-30 minutes of operating time for the mastectomy, and did not prolong hospitalization. Before we began to replace the expander with a permanent silicone prosthesis there were complications in 4 patients (14%). These included development of a seroma in 3, 1 of which became infected 40 days after insertion of the tissue expander, and capsular contraction in a patient who had previously had radiotherapy to her breast. The case with the infection was the only failure and the expander had to be removed. Immediate reconstruction of the breast is easily performed and can be of tremendous psychological benefit to mastectomy patients. Chemotherapy or radiotherapy are not contraindications to this type of reconstruction.

Adult↗
PubMed1990

Kaposi's sarcoma in immunosuppression. Possibly the result of a dual viral infection.

Kaposi's sarcoma of the gingiva and skin developed in an HIV-negative renal transplant patient while he was receiving cyclosporine therapy. The Kaposi's sarcoma developed shortly after the patient had an acute infection with cytomegalovirus (CMV). Electron microscopy of the tumor's established cell line showed two types of virus-like particles. CMV DNA was identifiable in the cell line whereas infectious CMV could be isolated only after repeated passages (only after 3 months of culture). The other virus could not be identified, but did not appear to be either HIV or papilloma virus. The patient's tumor regressed after the discontinuation of cyclosporine therapy and the recovery from the acute CMV infection.

Adult↗
PubMed1990

The management of exposed cardiac pacemaker pulse generator and electrode using restricted local surgical interventions; subcapsular relocation and vertical-to-horizontal bow transposition techniques.

This paper describes an approach to the treatment of exposed pacemaker generator and electrode. Local infection is controlled by the administration of systemic antibiotics and topical antibacterial solutions. Because the generator and lead are enveloped by an inert synthetic coating, it is possible to eradicate an infection without their removal if it is due to a weak opportunist pathogen fully sensitive to antibiotics. Thereafter, subcapsular relocation of the exposed generator or vertical-to-horizontal transposition of the exteriorised lead is carried out. These surgical interventions are designed to overcome the vertical force which tends to cause the extrusion of the pacing hardware.

Aged↗
PubMed1988

Reconstruction of the maxilla with bone grafts supported by the buccal fat pad.

In the usual reconstruction of maxillary contour, the grafts are usually exposed to the antral or nasal cavities. This leads to postponed remodelling and a higher rate of resorption and sequestration. To avoid exposure of the grafts, the buccal fat pad is rotated into the maxillary sinus and lined to the bone grafts. The vascularized buccal fat pad not only contributes to a better integration of the bone grafts but also enables the restoration of normal physiologic function of the maxillary sinus.

Adipose Tissue↗
PubMed1987

Mandibular condylosis and apertognathia as presenting symptoms in progressive systemic sclerosis (scleroderma). Pattern of mandibular bony lesions and atrophy of masticatory muscles in PSS, presumably caused by affected muscular arteries.

Apertognathia (open bite) is usually a developmental deformity of the jaws and the dentoalveolar segments in childhood and adolescence. The sudden insidious appearance of an open anterior bite in adult life is extremely rare and may be due to pathologic condylar fractures (with displacement) or to bilateral condylosis. To the best of our knowledge, only five cases of bilateral mandibular condylosis in progressive systemic sclerosis (PSS) have been reported in the literature, and the present article deals with the sixth known case. In the 22-year-old woman presented in this article the mandibular manifestations were the very early symptoms of PSS, which had a very rapid fatal course. A review of the literature is presented, and attention is called to the serious significance of sudden apertognathia. PSS is a chronic generalized disease of the small arterial vessels and the mesenchyme tissues of unknown origin. The musculoskeletal system is often involved, and the disease may affect the mandible, causing bony erosions, osteolysis, and atrophy of the masticatory muscles. It is believed that these bony lesions are of ischemic origin. The lesions, which are usually bilateral, occur only in the condyles, the coronoid processes, and the gonial angles. The main arterial blood supply to the mandible and to the major part of the ascending ramus originates from the inferior alveolar artery. The blood supply of the condyles, the coronoid processes, and the gonial angles originates in small muscular arteries.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1986

Indirect cervical lymphoscintigraphy in healthy subjects via submucosal cheek injections.

A new method of cervical lymphoscintigraphy is presented. It was performed on 16 healthy individuals via bilateral submucosal cheek injections with 99mTc-rhenium-sulfide-colloid. The ipsilateral uptake by the lymphatics on each side of the neck was consistently demonstrated in 15 subjects and allowed a comparative evaluation of the cervical lymphatic chains, including the submental, submandibular, jugulo-digastric and jugulo-omohyoid. The transverse cervical chain was demonstrated in 10 of 16 subjects. The method is simple, reliable and capable of clearly visualizing the lymphatic drainage of the oral cavity.

Adult↗
PubMed1986

Idiopathic submandibular abscesses in children.

Idiopathic submandibular abscesses are often observed in young children and the report concerns 31 children treated over a period of 3 years. Their origin is unknown. As all these abscesses were lymph node abscesses in the submandibular region, it is assumed that they are due to minor oral and nasal cavity traumatic lesions secondarily infected. Antibiotic treatment and surgical drainage resulted in quick resolution and recurrences were never observed.

Abscess↗
PubMed1986

Accidental displacement of impacted maxillary third molars.

3 cases of accidental displacement of maxillary impacted 3rd molars are presented. 2 were displaced into the maxillary sinus and 1 into the infratemporal fossa. The difficulties in locating these displaced teeth are described and demonstrated on a dry skull model. The mode of treatment is discussed.

Adult↗
PubMed1979

Melanotic neuroectodermal tumor of infancy (pigmented melanoameloblastoma).

The paper describes a large pigmented maxillary tumor in a 46-day-old infant. The histological examination showed the tumor to be a melanotic neuroectodermal tumor of infancy (MNTI). No raised urinary levels of vanilmandelic acid could be shown. The tumor was surgically removed and during a 5 1/2-year follow-up period there was no clinical evidence of recurrence. The origin, behavior and treatment of these rare tumors are discussed.

Female↗
PubMed1979

Chondrosarcoma of the maxilla: report of case.

Chondrosarcomas of the jaws are rare tumors; an additional case in the maxilla is described. The literature that discusses the pathogenesis of the tumor, its biological behavior, and the preferred treatment is reviewed. The histologic differentiation between chondrosarcoma and benign cartilagenous tumors is discussed.

Adult↗
PubMed1978

A large mandibular tumor with a distinct radiological "sun-ray effect" as the primary manifestation of multiple myeloma.

The significant feature of the reported case was that of a sinister-looking mandibular tumor highly suggestive of a metastatic lesion or of osteogenic sarcoma. A biopsy specimen and results of a thorough medical work-up showed the lesion to be multiple myeloma. The myeloma cells apparently have the capability to stimulate osteoblastic activity and new bone formation. This capability should be kept in mind when making the differential diagnosis of osteoblastic bony lesions of the jaws.

Aged↗
PubMed1977

Osteochondroma of the coronoid process of the mandible.

A case of osteochondroma of the coronoid process is presented. The proper diagnosis of ill-defined symptoms in the temporomandibular joint requires conformity between clinical manifestations and radiologic findings. The importance of a thorough radiologic examination is stressed for the correct diagnosis of these rare, insidious, slow-growing tumors. A short review of the literature is presented, and the treatment and surgical approach to these tumors are discussed.

Chondroma↗
PubMed1977

Osteomyelitis of the maxilla in the newborn.

A case of osteomyelitis of the maxilla in a healthy infant is presented, the etiology of which seems to have been an upper respiratory tract infection. There was no evidence of lowered resistance and immunologic studies did not reveal any abnormality. Lincomycin seems to be the antibiotic drug of choice. In the present case, it was used, effectively, in conjunction with other antibiotics and surgical drainage.

Drug Resistance, Microbial↗
PubMed1977

Liposarcoma of the buccal mucosa.

An extremely rare tumor of the oral cavity, liposarcoma, is reported. The tumor was located in the submucosal layers of the cheek and protruded into the mouth. To the best of our knowledge this is the fourth reported instance of liposarcoma of the cheek in the world literature. Combined surgical excision and radiotherapy proved a success as judged by a 3-year follow-up.

Adult↗
PubMed1977

Localized hyperplastic lesions of the gingiva: a clinicopathological study of 302 lesions.

A study was made of a series of 302 consecutive cases of localized hyperplastic lesions of the gingiva (epulides). The lesions were classified into five groups: pyogenic granuloma, calcifying fibroblastic granuloma, fibrous hyperplasia, peripheral giant cell granuloma and denture hyperplasia. The study indicates that there are some differences in age and sex distribution as well as in location between the different histological groups. Pyogenic granuloma was found to be the most common lesion on the gingiva. Pyogenic granuloma and calcifying fibroblastic granuloma occur in younger patients more often than fibrous hyperplasia, and thus may represent a stage in the development of fibrous hyperplasia. Denture hyperplasia occurs predominantly in females and it is suggested that its formation may be affected by hormonal alterations in the menopause.

Adolescent↗