By observing the structure of SGs, it was clear that there was an abundant heterochromatin in the nucleus of the myoepithelium
, and these cells could be SCs.
Loss of myoepithelium
is variable in solid papillary carcinoma of the breast.
is present at the periphery of the duct and is sparse to absent within the papillae.
The bioengineered germ developed into a mature gland through acinar formations with the myoepithelium
In breast CFNAC, the cellularity of the smear, lack of cohesion between the cells and absence of myoepithelium
are at least as important features of malignancy as the nuclear atypia itself.
Immunolocalization of the smooth muscle-specific protein calponin in complex and mixed tumors of the mammary gland of the dog: assessment of the morphogenetic role of the myoepithelium
. Vet Pathol 39: 247-256.
The entire ductal/alveolar system is lined by 2 cell layers; an inner epithelium and an outer myoepithelium
. The myoepithelial layer exhibits contractile-like properties and plays a role in both the support of the ductal/alveolar system and milk ejection, whereas the epithelial cells have secretory and absorptive functions.
The use of oxytocin nasal spray enhances the onset of lactation, by contracting the myoepithelium
cells, which forces milk from the aveolar canals into the large sinuses, where it becomes available to the suckling infant or for withdrawal by pumping.
Oxytocin causes the contraction of breast myoepithelium
and milk ejection, and, like prolactin, remains elevated after birth in breastfeeding women.
In developing salivary glands, a common stem cell is responsible for the development of luminal epithelial cells and myoepithelium
. Therefore, it should be expected that proliferating neoplastic cells in a myoepithelioma would occasionally differentiate these luminal cells.
The hyperplasia glandular ducts have two types of cells: glandular epithelium and myoepithelium
. (2) Epithelial hyperplasia type: significant florid hyperplasia is present in the epithelia of the collecting ducts and hyperplasia glandular ducts.
Lack of myoepithelium
in apocrine glands of the breast does not necessarily imply malignancy.