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Biomedical subjects

A Nishimura

Publications and source records attributed to A Nishimura.

At least 271 records · Page 15Linked to original sources

Carcinoma of the cystic duct: case report.

A case of carcinoma of the cystic duct is presented and comprehensive review of the literature was provided. Since no characteristic clinical signs are present, the diagnosis can only be made incidentally at the time of laparotomy for non-visualizing gallbladder. Even then histological study of the resected specimen is mandatory. In our present case after the confirmation of the diagnosis the second look exploration was done. However, careful examination of the bile duct system failed to find evidence of carcinomatous involvement suggesting that carcinoma found in the cystic duct was of a primary and not a secondary invasion. The present case constitutes the nineteenth case which meets completely the criteria proposed by Farrar. Since the only hope or cure lies with the early diagnosis of the disease, early exploratory laparotomy and prophylactic removal of nonfunctioning or calculous gallbladder are recommended.

Adenocarcinoma, Papillary↗

Isolation of Hfr strains from R+ and ColV2+ strains of Escherichia coli and derivation of an R'lac factor by transduction.

Temperature-resistant revertants were isolated from Escherichia coli strains carrying a temperature-sensitive dnaA mutation (initiation of chromosome replication) and either a repressed or a derepressed F-like R factor or a ColV2 factor. Many of the revertants had all the properties of Hfr strains, with a variety of directions and origins of transfer. From one such revertant, episomes carrying the R factor and part of the lac region (R'lac) could be isolated by transduction. This system offers a good selection for Hfr strains produced by integration of various episomes and for the isolation of R' factors.

Anti-Bacterial Agents↗