pyknosis

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Related to pyknotic: karyolytic

pyknosis

[pik′nō·səs]
(pathology)
The polymerization and contraction of the nuclear chromosomal components.
References in periodicals archive ?
At 20 [micro]M/kg, spermatogenic cells adjacent to Sertoli cells were observed in the pyknotic form.
Electron microscopic observation showed that during the first week after injection, all types of granular cells of the anterior pituitary in male animals exhibited cellular damage, including disrupted organelles and cellular structure, as well as pyknotic or lyric nuclei.
Histologically, the surface epithelium forms an eosinophilic syncytiumlike mass with indistinct cell borders and shrunken and pyknotic nuclei, overlying rounded balls of collapsing stroma.
H&E staining showed the presence of histological changes in the ischemic regions of injured brains with the following characteristics: condensate nuclei, loss of affinity for hematoxylin, perinuclear vacuole, pyknotic nuclei, and cytoplasmic eosinophilia in the subcortical and hippocampal CA1 regions (Fig.
The ulcer bed consisted of necrotic debris and pyknotic epithelial cells.
By their criteria, SDCC had either (1) absent, pyknotic, or irregular-shaped nuclei, or (2) acidophilic or vacuolated cytoplasm.
4e, most neurons in the damaged area appeared shrunken with eosinophilic cytoplasm and triangulated pyknotic nuclei at 24 h after reperfusion.
Microscopic examination of the hippocampus revealed hypereosinophilic neurons with pyknotic nuclei, consistent with hypoxic-ischemic injury.
At the surface, they have small, pyknotic nuclei and abundant cytoplasm and are flattened with their long axis parallel to the surface.
Islets from the pancreas of the diabetic control rats possessed pyknotic nuclei, whereas some cells contain dark nuclei, and few cells at the periphery had round or ovoid nuclei.
Biopsy specimens from the hepatic flexure and ascending colon revealed rare clusters of small GCs with pyknotic nuclei and some thick nerves between the muscular layers (Figure 2, b).