myoepithelium


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myoepithelium

 [mi″o-ep″ĭ-the´le-um]
tissue made up of contractile epithelial cells. adj., adj myoepithe´lial.

my·o·ep·i·the·li·um

(mī'ō-ep'i-thē'lē-ŭm),
Spindle-shaped, contractile, smooth musclelike cells of epithelial origin that are arranged longitudinally or obliquely around sweat glands and the secretory alveoli of the mammary gland; stellate myoepithelial cells occur around lacrimal and some salivary gland secretory units.
Synonym(s): muscle epithelium
[myo- + epithelium]

my·o·ep·i·the·li·um

(mī'ō-ep-i-thē'lē-ŭm)
Spindle-shaped, contractile, smooth musclelike cells of epithelial origin that are arranged longitudinally or obliquely around sweat glands and the secretory alveoli of the mammary gland; stellate myoepithelial cells occur around lacrimal and some salivary gland secretory units.
References in periodicals archive ?
(2-13) However, recent publications have shown that most either completely lack myoepithelium, both within papillae and at the periphery or, less frequently, have very sparse myoepithelium at the periphery only.
The myoepithelium, positive for p63, smooth muscle actin, and calponin, was well preserved and outlining the duct.[sup][4] This helps in differential diagnosis with malignant diseases which were positive for c-erbB-2, p53, and lack of complete myoepithelium.
In frenulates and Sclerolinum the trophosome has been described as a simple two-layered organ with an inner epithelium of bacteriocytes derived from endoderm and an outer myoepithelium (Southward, 1993).
However, the peripheral myoepithelium may be attenuated or discontinuous in larger lesions with markedly distended duct spaces (Figure 6, A).
Myoepithelium. Any epithelium containing myocytes (Rieger and Lombardi, 1987).
Antibodies to p63 have been used for many years to identify myoepithelium in the breast, the outer cell layer in prostatic glands, and squamous (and transitional) cell differentiation.
In some preparations the myoepithelium that envelops the MNN neurons was removed to expose the nerve net (Anderson and Schwab, 1984).
Immunolocalization of three novel smooth muscle-specific proteins in salivary gland pleomorphic adenoma: assessment of the morphogenetic role of myoepithelium. Mod Pathol.
D2-40 expression by breast myoepithelium: potential pitfalls in distinguishing intralymphatic carcinoma from in situ carcinoma.
(3-5,17) The presence of regularly spaced, rounded or ovoid glands; unidirectional streaming of the glands; and prominent clear cell or spindle cell myoepithelium are some morphologic clues to the diagnosis of AME.
Expression of smooth muscle-specific proteins in myoepithelium and stromal myofibroblasts of normal and malignant human breast tissue.
(13) These cells were able to differentiate toward glandular epithelium and myoepithelium through intermediate cells expressing CK5/CK8/CK18/CK19 and CK5/SMA.