Myoepithelioma

Abstract

Myoepithelioma is a benign salivary gland tumor in the head and neck region, accounting for 1–1.5% of all glandular tumors. The diagnosis is rendered histopathologically, and it includes the proliferation of myoepithelial cells, without chondroid or myxochondroid stroma and ductal components (up to 5% of ductal component is acceptable). In our case report, this lesion has occurred in a 46-year-old female patient, and presented as well defined, nodular growth on the right posterior palatal region. Bony erosion and invasion were observed radiographically, and the lesion was excised surgically, with 1–2 cm of clear margin. The microscopic features included proliferating tumor sheets, composed of bland looking spindle and plasmacytoid shaped myoepithelial cells, and few cells showed clear cytoplasm, which were confirmed immunohistochemically as myoepithelial cells. Thus, the final diagnosis of benign myoepithelioma was rendered and no recurrence had been reported so far in the regular follow-up.

Colorimetric Sensing of Hydrogen Peroxide Using Ionic‐Liquid‐Sensitized Zero‐Valent Copper Nanoparticle (nZVCu)

“…[28] The XRD pattern showing small peaks at 2θ = 35.43°, 38.59°,48.86°, 58.25°, and 66.73°may be attributed to the oxides of copper and these findings were inconsistent with the previous study. [29] The appearance of sharp peaks in the XRD diffractogram depicts the successful formation of highly crystalline zero-valent copper due to the chemical reduction method. [30] The crystallite size of the particle was calculated from the major diffraction's peaks using the Scherrer's equation as below.…”

Antibacterial Behavior of Laser-Ablated Copper Nanoparticles

“…The absorption band of Cu NPs has been reported in the range of 400-900 nm [14,24]. Continuous laser pulses ablate the Cu target.…”

Primary leiomyosarcoma of the submandibular gland: a case report

“…Desmin can be either positive or negative [ 5 , 14 ]. S-100 protein, CD34, CD31, CD117, and pancytokeratin are generally negative [ 15 ]; these findings play an important role in excluding myoepithelioma, sarcomatoid carcinoma, melanoma, metastatic gastrointestinal stromal tumor, and other sarcomas [ 5 , 7 , 16 ]. However, the main differential diagnosis is metastatic leiomyosarcoma from other malignancies of head and neck sites, soft tissues and uterine corpus; thus, clinical informations and imaging studies are very important [ 7 ].…”