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Biomedical subjects

H Bonnet

Publications and source records attributed to H Bonnet.

At least 55 records · Page 3Linked to original sources
PubMed1978

[Ocular localization appearing in a child with acute lymphoblastosis after hematological remission for 18 months].

Case report of a 4-year-old girl in whom a unilateral ocular localization appeared after 1 1/2 year of maintained remission of acute lymphoblastic leukaemia. The evolution of this localization can be divided in three phases: 1. During the first 17 months, an apparent simple relapsing conjunctivitis of the left eye. 2. During the following 5 months, repeated episodes of the left iritis with mydriasis and discolouration of the iris. 3. Finally, left uveitis involving the anterior chamber, with hypopion, hyphaema and glaucoma; the clinical presentation at this stage was suggestive of ocular lymphoblastosis. Radiotherapy to the lesion (total dose, 1 200 rads) was quickly followed by resolution without sequelae. No relapse was observed during the following 30 months, till death. The ocular disease remained the only manifestation of leukaemia during its evolution. A haematological relapse occurred 11 months after cure of the iritis, followed 1 year later by a second, treatment-sensitive relapse, and finally by a third, fatal relapse. The patient survived 5 years 9 months.

Child, Preschool↗
PubMed1977

[Plasma prolactin levels in normal children from birth to adolescence].

Plasma prolactin levels were determined by an homologous radio-immuno assay in normal children: in cord blood, at the first day of life, during childhood and along puberty. 1. In both sexes, there is a very important secretion of prolactin during the neonatal period. 2. Longitudinal studies make obvious a different pattern of plasma prolactin in boys and in girls at puberty.

Adolescent↗
PubMed1977

[Diffuse hamartomatous tumor of the cerebellum and brain stem in children].

A child presented in the first year of life with a slowly evolving cerebellar syndrome which resulted in death at the age of 4 1/2 years. A peculiar tumour involving the cerebellum and brain stem and destroying the cerebellar anatomy is described. This was considered to be a form of gangliomatous hamartoma.

Brain↗
PubMed1976

[Localized hemangioma of the bronchial trunk of the left lung in a 2-month-old infant].

A 2 month-old infant was admitted because of respiratory distress and thoracic assymetry. X-ray films revealed a distension of the left lung. A pneumo-angiography showed a cardiac silhouette displaced to the right and a normal vascular tree of the left lung. The rapid impairement of the clinical picture led to an exploratory thoracotomy. A tumor at the level of the left hyparterial bronchus was found. The histologic characteristics of the tumor were those of a hemangioma. Within the spectrum of broncheal tumors, hemangioma belong to benign mesenchymatous tumors and have a good prognosis providing that their removal is complete.

Airway Obstruction↗
PubMed1976

[Pulmonary surfactant in neonatal pathology].

Following some preliminary remarks on the role of the surfactant in pulmonary physiology and physiopathology, a physiochemical study of the lungs of 26 infants who died in the neonatal period is reported. Two techniques for measuring the decrease in surface tension are set out. The results in the first case (tensiometric method) allow an explanation of the physiopathological aspect of respiratory distress; in the second case (manometric method) the diagrams obtained are characteristic of different clinical states (normal subjects; subjects born prematurely without any hyaline membrane etc...). Furthermore, the second method gives rise to certain hypotheses as to the physiochemical structure of the substances responsible for the tensio-active properties of the surfactant.

Humans↗
PubMed1975

[Lymphoid hyperplasia of the colon].

Report of the cases of two infants presenting with lymphoid hyperplasia of the colon, occuring after intestinal obstruction associated with enterocolitis. In one case, it was histologically proved. These cases emphasize the problem of the real meaning of lymphoid hyperplasia of the colon, as well as the meaning of its relationships with enterocolitis. Evolution was benign and it seems that there is no peculiar symptomatology.

Barium Sulfate↗
PubMed1975

[Pulmonary surfactants. Generalities].

The alveolar wall on contact with air can be compared with a biological air-liquide interface. As with all interfaces, there are therefore superficial forces which tend to reduce the surface to a minimum. In the case of a pulmonary alveolus with a spherical surface, these forces are at the origin of an internal pressure excess dependent on the radius of the alveolus and on the superficial tension related to the nature of the interface. Owing to the disparity in the alveolar radii, under these conditions the smaller alveoli would collapse to the benefit of a larger one, the pressure being lower and lower in the latter. In addition, at any time in the respiratory cycles, this surpression must be negligible in order to avoid rupture of the equilibrium of the forces exerted on the alveolar wall. Consequently, it is necessary that this air-alveolar wall interface should have a superficial tension on the one hand variable with the surface, and on the other hand always very low. Owing to the demonstration of large concentrations of phospholipid in this area, it can be thought that a superficial film is substituted at the air-biological liquid interface and owing to this fact effectively has superficial properties necessary for alveolar stability. The "surface-tensio-active" effect of this film lead to the giving of the name of "surfactant" to these constituents as a whole.

Animals↗