✓ Embryonic chick heart fragments were confronted in vitro with cells from 26 freshly
resected human brain tumors. The tumor-derived cells were scored according to their …

Abstract ONE HUNDRED FIFTY-ONE tumor fragments were collected in the neurosurgical
operating amphitheater immediately after removal. Small tumor fragments were transferred …

Invasive properties of 15 continuous neurogenic rat cell lines were investigated in vitro and
were compared to their tumorigenicity in inbred BD IX rats. The cell lines were obtained by …

Since it is difficult to study the dynamic biological aspects of brain tumour invasion using
histological sections of surgical biopsy and autopsy tissues, various laboratory systems have …

Cells of 56 primary cell cultures derived from primary and secondary brain tumours were
confronted in vitro with host tissue, embryonic chick heart fragments (PHF). The evolution of …

Five established cell lines derived from human anaplastic astrocytomas or glioblastoma
multiforme were tested for invasiveness into precultured chick heart fragments in vitro. Four …

In order to investigate the invasiveness of brain tumours, fragments of freshly resected
tumours are transferred into cell culture vessels to form monolayers. The tumour derived …

The invasiveness of human intracranial tumours was studied in an organ culture system.
Biopsies from six glioblastomas, four astrocytomas, two mixed gliomas, one ependymoma …

Invasion of chemically induced brain tumour cells from BD IX-rats into precultured fragments
of embryonic chick heart (PHF) was studied by transmission electron microscopy. The …

Qualitative and quantitative methods for the analysis of invasion in 'natural'and in
experimental tumours in vivo and in vitro are reviewed. In human tumours the functional …