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Biomedical subjects

A Sahni

Publications and source records attributed to A Sahni.

14 recordsLinked to original sources
PubMed1991

Jejunal diaphragm.

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Child, Preschool↗
PubMed1991

Skeletal manifestations in beta-thalassaemia intermedia.

Thalassaemia intermedia with distressing complications is reported from India. An 11 year old boy presented with recurrent fractures since 6 years of age. Investigations revealed that he had multiple healed fractures of long bones, hypersplenism, iron overload and a red blood cell half life (t1/2) of 17 1/2 days. Splenectomy was planned.

Bone Diseases↗
PubMed1990

Rifampicin-induced upper gastrointestinal bleeding.

Gastrointestinal disturbances like anorexia, nausea, vomiting, abdominal discomfort and diarrhoea are known adverse effects of rifampicin. We report an upper gastrointestinal bleeding due to haemorrhagic gastric erosions after ingestion of rifampicin for pulmonary tuberculosis. The cause and effect relationship between development of haemorrhagic gastric erosions and rifampicin administration was confirmed by rechallenge with rifampicin. To our knowledge no such adverse effect of rifampicin has been reported previously.

Child↗
PubMed1990

Progeria.

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Child, Preschool↗
PubMed1987

Evolutionary aspects of reptilian and mammalian enamel structure.

The evolution of enamel structure is dealt with here on the basis of fossil reptiles and mammals ranging from the Triassic to the present. The evidence suggests that prismatic enamel had developed in some therapsid reptiles and the mammal, Eozostrodon about 180 million years ago. For the next 100 million years, mammalian evolutionary history is sparingly documented and this is reflected in the poor record of enamel evolution during this period. The few Jurassic reptiles and mammals studied suggest a preprismatic structure. In the Late Cretaceous (80 to 65 million years ago) when the fossil record improves, mammalian enamel investigated from North American localities, are found to be prismatic; allotherian (multituberculate) and metatherian (marsupial) enamels are usually tubular, while eutherian (placental) ones are not. Prism structure in Tertiary mammals in general, conforms to that of their present day descendants, but there are discernible exceptions. The record of evolutionary change in Tertiary mammals is obscured by functional modifications related to biomechanical stresses. Enamel structure may be secondarily modified; similar in phylogenetically unrelated groups (eg., pauciserial enamel of early rodents) or dissimilar at the intra-familial level (eg., rodent families Ctenodactylidae and Ischryomyicae). Prismatic enamel is recorded from the tooth of a hatchling of the gavial, Gavialis gangeticus.

Animals↗