RESUMO
After division of the tendo achilles in rats heterotopic bone forms in the muscle and in the tendon stumps. Tenotomy was performed in 26 male rats. Thirteen received Verapamil (36 mm/Kg) for six days per week for five months, and the remainder were not given this drug. The onset of heterotopic ossification was monitored by monthly x-rays. After five months the animals were killed and the sectioned tendons examined microscopically. The radiographs had shown that the amount of ossification was less in rats treated with Verapamil. This was confirmed at microscopy, but examination of the sections under polarised light showed that the ratio of lamellar to woven bone was the same in the two groups. Verapamil appeared to reduce the amount of heterotopic bone formation but did not influence the substitution of woven by lamellar bone.
Assuntos
Tendão do Calcâneo/cirurgia , Ossificação Heterotópica/prevenção & controle , Verapamil/farmacologia , Tendão do Calcâneo/diagnóstico por imagem , Tendão do Calcâneo/efeitos dos fármacos , Animais , Membro Posterior/diagnóstico por imagem , Masculino , Microscopia de Polarização , Ossificação Heterotópica/diagnóstico por imagem , Radiografia , Ratos , Ratos EndogâmicosRESUMO
Thirty seven female patients with osteoporosis underwent iliac bone biopsy after 10 to 23 months of continuous or discontinuous treatment with sodium fluoride, calcium, and vitamin D. Microradiographs of the biopsies from 13 patients showed one or--more often--several of the characteristic appearances of bone fluorosis: defects in periosteocytic mineralization, unmineralized strips inside the trabeculae of spongy bone, construction of fibrous bone, hypercalcified periosteal apposition. The occurrence of these microradiographic signs of fluorosis does not seem to be linked either to the age of the patients, to the interval elapsed since ovarian function ceased, or to the degree of bone remodelling at the time that treatment was started. Moreover, none of these patients showed signs of even moderate renal insufficiency. Should the development of this fluorosis, which is most frequently clinically asymptomatic, be considered as a condition or as a factor in therapeutic efficacy? Or are the effects detrimental and therefore to be avoided by a reduction in dosage or a change in therapeutic methods?
Assuntos
Intoxicação por Flúor/patologia , Ílio/patologia , Menopausa , Osteoporose/patologia , Fluoreto de Sódio/uso terapêutico , Adulto , Idoso , Biópsia , Calcifediol/uso terapêutico , Cálcio/uso terapêutico , Feminino , Intoxicação por Flúor/diagnóstico por imagem , Humanos , Ílio/diagnóstico por imagem , Microrradiografia , Pessoa de Meia-Idade , Osteoporose/diagnóstico por imagem , Osteoporose/tratamento farmacológico , Fluoreto de Sódio/efeitos adversosRESUMO
The object of the present study was to examine all the metaphyseal and epiphysial abnormalities from sixty one patients with osteogenesis imperfecta. Regarding the growing ends of the bones, eight of the 61 children (13%) had disorders in the epiphyseal ends of the bones. The development of the radiological features can be divided into three stages. The last one is characterized by a severe epiphyseal deformation. Histologically there is a disorderly proliferation of the calcified cartilage at the center of the epiphyses. Several physio-pathological hypothesis may be advanced, and particularly the responsibility of the vascular upsets secondary to fractures.
Assuntos
Osso e Ossos/diagnóstico por imagem , Epífises/diagnóstico por imagem , Osteogênese Imperfeita/diagnóstico por imagem , Fêmur/diagnóstico por imagem , Fraturas Ósseas/diagnóstico por imagem , Fraturas Ósseas/fisiopatologia , Humanos , Radiografia , Tíbia/diagnóstico por imagem , Fatores de TempoRESUMO
Sixty-one cases of osteogenesis imperfecta were studied to try to discover the cause of metaphyseal and epiphyseal deformities. These deformities were noticeable in 8 cases out of 61 at the level of the upper and lower end of the femur in all cases and sometimes at the level of the lower end of the tibia and the upper end of the humerus. Several grades are described: First grade - protrusion of the growth plate into the epiphysis. Second grade - disorganization of the architecture of the epiphysis. Third grade - major deformity. It seems that the deformities are secondary to lesions of the growth plates. Several hypotheses are suggested. The authors consider that the main role is played by segmental fractures creating areas of ischemia in the epiphyses.
Assuntos
Epífises/diagnóstico por imagem , Osteogênese Imperfeita/diagnóstico por imagem , Cartilagem Articular/crescimento & desenvolvimento , Epífises/crescimento & desenvolvimento , Humanos , Osteogênese Imperfeita/fisiopatologia , RadiografiaAssuntos
Doenças do Pé/diagnóstico por imagem , Distrofia Simpática Reflexa/diagnóstico por imagem , Descalcificação Patológica/diagnóstico por imagem , Densitometria/métodos , Feminino , Doenças do Pé/metabolismo , Humanos , Radioisótopos do Iodo , Masculino , Pessoa de Meia-Idade , Cintilografia , Distrofia Simpática Reflexa/metabolismoAssuntos
Fenômenos Eletromagnéticos/uso terapêutico , Fraturas não Consolidadas/terapia , Adolescente , Adulto , Idoso , Criança , Clavícula/lesões , Feminino , Fraturas do Fêmur/terapia , Humanos , Fraturas do Úmero/terapia , Masculino , Pessoa de Meia-Idade , Fraturas do Rádio/terapia , Fraturas da Tíbia/terapia , Fraturas da Ulna/terapia , Traumatismos do Punho/terapiaRESUMO
This work deals with the results obtained by four French orthopaedic departments using the electromagnetic field stimulation for non union treatment. This is the method established by A. Bassett. 37 cases are studied, the results are known for 35 of them with 6 failures and 29 successes. The failures can be explained for four of them by a bad application of the device. Concerning the 29 successful cases, the role of the stimulation is discussed. Discarding those who have been treated a short time after a surgical procedure, those who have been immobilized more than 6 months and those where the non union could have been a delayed union, it remains 14 successful cases apparently undisputable. For them the role of the electromagnetic field stimulation seems real.
Assuntos
Fenômenos Eletromagnéticos/uso terapêutico , Magnetoterapia , Pseudoartrose/terapia , Adolescente , Adulto , Idoso , Criança , Estimulação Elétrica , Campos Eletromagnéticos/efeitos adversos , Feminino , Fraturas do Fêmur/terapia , Humanos , Fraturas do Úmero/terapia , Masculino , Pessoa de Meia-Idade , Fraturas do Rádio/terapia , Fraturas da Tíbia/terapiaRESUMO
Embryo Chicks were exposed to various types of electrical impulses transmitted by induction coils between the 6th and 13th day of incubation. Compared with controls, the Chick tibias showed a highly significant increase in weight and length as well as increased incorporation of tritiated thymidine. In addition, the total weight of the treated embryos was significantly greater than that of the controls. The results suggest that the effects of these electro-magnetic fields, particularly their skeletal effects, act principally on cellular multiplication and/or enhanced cellular activity following an increase in protein synthesis.
Assuntos
Desenvolvimento Ósseo , Osso e Ossos/metabolismo , Campos Eletromagnéticos , Fenômenos Eletromagnéticos , Animais , Peso Corporal , Osso e Ossos/embriologia , Osso e Ossos/ultraestrutura , Embrião de Galinha , Tamanho do Órgão , Timidina/metabolismo , TrítioRESUMO
A patient aged 65 years was observed to have successive adenomegalic syndromes over a period of 4 years, with variable histological appearances. A right cervical adenopathy had the histological appearance of a simple antigenic-stimulation lesion. Three years later, a right inguinal adenomegaly presented all the histological criteria of angioimmunoblastic adenopathies, without, however, any humoral immunity disturbance. Two months later, a biopsy of a palatine tumour confirmed the diagnosis of an immunoblastic sarcoma. The condition then became generalized as a lymphoblastic type of diffuse lymphosarcoma, and autopsy one year later showed the presence of a pleomorphic lymphosarcoma in several lymphoid formations. This case serves as a basis for discussing the concept of angio-immunoblastic adenopathy; the result of various antigenic aggressions or the early stage of a haematosarcoma. It also clearly demonstrates the sometimes contingent characteristics and difficulties in classification of haematosarcomas.
Assuntos
Linfadenopatia Imunoblástica/patologia , Linfoma não Hodgkin/patologia , Idoso , Humanos , Linfoma não Hodgkin/classificação , MasculinoRESUMO
The authors present a case of duodenal schwannosarcoma, a rare tumor revealed by an ordinary dyspeptic syndrome. Radiological examination of the stomach revealed the presence of an internal paraduodenal diverticular picture. Arteriography showed the hypervascularized tumor as well as its extension and hepatic metastases.