Sentences with phrase «tissue blocks»

«After diagnostic studies on tissue removed during a patient's operation are completed, the formalin - fixed paraffin tissue blocks are stored for several years.

The scar tissue blocks the flow of blood through the liver leading to increased pressure in the blood vessels in the intestine and thus to the leakage of intestinal bacteria, which reach the liver via the blood.

Patients often have available tissue blocks from nephrectomy specimens, but not from metastatic sites for analysis of biomarker expression, yet metastatic specimens are typically treated with systemic therapy, after nephrectomy.

[25] Seeing that in metastatic patients the only available tumor is often core biopsies rather than whole tissue blocks, we next attempted to determine whether the degree of heterogeneity varies between primary and metastatic sites, using the TMA cores as surrogates for core biopsy specimens.

In gymnosperms, wind deposits a pollen grain on an exposed egg cell, and then the pollen tube — growing at the slow rate of 20 micrometers an hour — releases an enzyme that destroys any tissue blocking the sperm's entrance into the egg cell.

Professor Denk's solution — first published in 2004 - was to perform scanning EM not on the cut sections of a tissue sample, but rather on the surface of the tissue block after repeatedly removing each top section — which he called «serial block - face electron microscopy.»