On the Degeneration of Germ Cells in Experimental Cryptorchid Testes of the White Rat (Studies on Abnormal Nuclear Divisions, 1)

抄録

In the cryptorchid testes of white rats which were artificially confined in the abdominal cavity, degeneration phenomena of germ cells were cytologically investigated. As cytological phenomena taking place in association with the degeneration, the following abnormalities were observed: stickiness and coalescence of chromosomes, swelling of chromosomes, deformation of chromosomes into bodies of round shape, chromosome bridges at anaphase, scattering or displacement of chromosomes at metaphase, non-disjunction and lagging of chromosomes at anaphase, irregular distribution of chromosomes at anaphase, varying numbers of chromosomes, formation of bi- and multi-nucleate cells, and uni- and multi-polar mitoses.
A tentative conclusion was drawn on the cause of these mitotic abnormalities that a change in normal water distribution in the cell may be taken as a favourable basis of explaining the question.