A malignant myoepithelioma is one of the rarest salivary gland neoplasms which may either arise de novo or develop within a preexisting pleomorphic adenoma or benign myoepithelioma. The parotid gland is the most common primary site and the palate the most common intra-oral site of occurrence. Herein is present a case of a malignant myoepithelioma arising in the hard palate of a 79-year-old woman. The lesion had been examined by biopsy at another hospital, and diagnosed as a poorly differentiated squamous cell carcinoma. The patient underwent a wide local tumor resection. Examination of the resection specimen showed the characteristic histopathological and immunohistochemical features of a malignant myoepithelioma. Five months after the operation, the patient was well without evidence of recurrence or metastasis.
Aged ; Female ; Humans ; Immunohistochemistry ; Myoepithelioma/*diagnosis/*pathology/surgery ; Palatal Neoplasms/*diagnosis/*pathology/surgery ; Palate/*pathology/*surgery

A patient diagnosed with myoepithelial carcinoma was recently treated in our department. The neoplasm was huge, located in the left maxillofacial region, blocking both eyes, impeding feeding. About one month before admission, the tumor began to bleed frequently, about 100 ml each time, causing headache, dizziness, fatigue, and cold sweats. CT showed the maximum diameter of the tumor was about 23 cm, with uneven density, and maxillofacial bone destruction. MRI revealed internal bleeding and necrosis inside the tumor. After admission, blood routine test showed erythrocyte count 3.64 x 10(12)/L(↓), hemoglobin 106 g/L(↓), hematocrit 0.320 (↓), serum iron 6.2 μmol/L(↓). After surgery, the patient recovered smoothly.
Carcinoma ; diagnosis ; surgery ; Humans ; Magnetic Resonance Imaging ; Myoepithelioma ; diagnosis ; surgery ; Nasal Cavity ; pathology ; Paranasal Sinus Neoplasms ; diagnosis ; surgery ; Paranasal Sinuses ; pathology

OBJECTIVETo report the first case of primary epithelial-myoepithelial carcinoma (EMC) in the liver.

METHODSThe clinical manifestations, imaging characteristics, and histopathological changes of EMC in this case were described. The patient was a thirty-seven-year old female. A 10 cm lesion was detected in the right liver upon a routine examination. Following that, the CT scan, magnetic resonance imaging (MRI), repeated puncture biopsies, and serum alpha-fetoprotein (AFP) detection were done with no specificity and significance found.

RESULTSRight hemi-hepatectomy was performed. The special double catheterization cannula was found in the histopathological examination, and the final diagnosis of EMC was proven by immuno-histochemical staining.

CONCLUSIONSPrimary EMC is difficult to be finally diagnosed prior to the surgery. The diagnosis can be confirmed using pathological examination and immuno-histochemical staining of the specimen.

Actins ; analysis ; Adult ; Carcinoma, Hepatocellular ; diagnosis ; metabolism ; surgery ; Female ; Hepatectomy ; methods ; Humans ; Immunohistochemistry ; Liver Neoplasms ; diagnosis ; metabolism ; surgery ; Muscle, Smooth ; chemistry ; Myoepithelioma ; diagnosis ; metabolism ; surgery ; S100 Proteins ; analysis

Prompted by a unique case of an ectomesenchymal chondromyxoid tumor (ECT) of the palate in a 54-year-old female, we reviewed the English and German literature on this entity until the end of 2016 using PubMed. The search produced 74 lingual cases with a nearly equal sex distribution and a mean age of 39.3 years, and two extra-lingual cases sharing histological and immunohistological features including nodular growth, round, fusiform or spindle-shaped cellular architecture, and chondromyxoid stroma. Immunophenotyping showed the majority of cases to be positive for glial fibrillary acidic protein (GFAP), S-100 protein, glycoprotein CD57, pancytokeratin (AE1/AE3), and smooth muscle actin (SMA); in isolated cases there was molecular-genetic rearrangement or gain of Ewing sarcoma breakpoint region 1 (EWSR1) but no rearrangement of pleomorphic adenoma gene 1 (PLAG1). At present, ectomesenchymal cells that migrate from the neural crest are considered to play a pivotal role in tumor origin. All cases had a benign course, although there were three recurrences. Because of the rarity of this tumor and the need for differential diagnostic differentiation from myoepithelioma and pleomorphic adenoma, both oral surgeons and pathologists should be aware of this entity.
Biomarkers, Tumor ; analysis ; Chondroma ; pathology ; surgery ; Diagnosis, Differential ; Female ; Humans ; Immunophenotyping ; Mesenchymoma ; pathology ; surgery ; Middle Aged ; Myoepithelioma ; pathology ; surgery ; Palatal Neoplasms ; pathology ; surgery

Chordoma ; metabolism ; pathology ; Diagnosis, Differential ; Elbow ; Humans ; Immunohistochemistry ; Male ; Mucin-1 ; metabolism ; Myoepithelioma ; metabolism ; pathology ; surgery ; Soft Tissue Neoplasms ; metabolism ; pathology ; surgery ; Vimentin ; metabolism ; Young Adult

We describe the enhancement patterns of myoepithelioma in two patients with a soft palate mass. In the first case, helical CT revealed a faintly enhancing mass. Histologically, the tumor was composed of plasmacytoid cells in a background of rich myxoid stroma. Immunostaining for CD34 showed scanty blood vessels. In the second case, helical CT revealed an intensely enhancing mass. Histologically, the mass was a cellular tumor with fibrous stroma. Immunostaining for CD34 also showed frequent blood vessels.
Aged ; Contrast Media/administration & dosage ; Diagnosis, Differential ; Female ; Humans ; Iohexol/analogs & derivatives/diagnostic use ; Male ; Middle Aged ; Myoepithelioma/*diagnosis/surgery ; Palatal Neoplasms/*diagnosis/surgery ; Palate, Soft/*radiography/surgery ; Radiographic Image Enhancement/methods ; Rare Diseases ; Tomography, Spiral Computed/*methods

Adenocarcinoma ; metabolism ; pathology ; Adenocarcinoma, Clear Cell ; metabolism ; pathology ; Biomarkers ; metabolism ; Carcinoma ; metabolism ; pathology ; surgery ; Diagnosis, Differential ; Female ; Humans ; Keratins ; metabolism ; Membrane Proteins ; metabolism ; Middle Aged ; Mucin-1 ; metabolism ; Myoepithelioma ; metabolism ; pathology ; surgery ; Neoplasm Recurrence, Local ; Parotid Gland ; surgery ; Parotid Neoplasms ; metabolism ; pathology ; surgery ; S100 Proteins ; metabolism