Myoepitheliomas are well-established to occur in the salivary glands, but they have also been described in the breast, upper aerodigestive tract, skin, and soft tissues. We report here on a unique case of primary myoepithelioma that occurred in the right testis of a 28-year-old man. The tumor was entirely confined to the testis and it was clearly separated from the epididymis. Histopathology revealed mixed architectural patterns in which the reticular areas merged into the chondromyxoid stroma. The tumor cells, which were focally immunoreactive to pancytokeratin and S-100 protein, were round to ovoid and spindly arranged in cords, strands, and fascicles. They showed mild nuclear pleomorphism, sparse mitotic figures and a low Ki-67 proliferative index. There was no ductal differentiation in the tumor. To the best of our knowledge, there has been only one case report of a primary testicular myoepithelioma in the English medical literature.
Adult ; Breast ; Epididymis ; Humans ; Male ; Myoepithelioma ; S100 Proteins ; Salivary Glands ; Skin ; Testis

A 24-year-old man was admitted due to an incidentally detected mass in his left testis, which showed radiopaque calcification on plain X-ray film. Left orchiectomy was performed, and the resected testis contained a well-demarcated, hard mass measuring 1.1 cm. Histological analysis revealed that the tumor was composed of neoplastic cells, fibrotic stroma, and laminated or irregularly shaped calcific bodies. The individual cells had abundant eosinophilic or clear cytoplasm with round nuclei, each of which contained one or two conspicuous nucleoli. They were arranged in cords, trabeculae, clusters, and diffuse sheets. There were several foci of intra-tubular growth patterns, with thickening of the basal lamina. Immunohistochemically, the neoplastic cells were positive for S-100 protein and vimentin, focally positive for inhibin alpha, and negative for cytokeratin, CD10, and Melan-A. In addition to reporting this rare case, we also review the relevant literature regarding large cell calcifying Sertoli cell tumors.
Basement Membrane ; Cytoplasm ; Eosinophils ; Humans ; Immunohistochemistry ; Inhibins ; Keratins ; MART-1 Antigen ; Orchiectomy ; S100 Proteins ; Sertoli Cell Tumor* ; Testis* ; Vimentin ; X-Ray Film ; Young Adult

Since patients with intracranial neoplasms usually represent their neurological symptoms rather early in the course of the disease, sudden unexpected death due to intracranial neoplasms is an uncommon event seen only exceptionally in medicolegal autopsy practice. Although meningiom is one of the most common primary intracranial neoplasms, sudden death due to the tumor is an uncommon event. We report a sudden, unexpected death of a 56-year-old female with an undiagnosed olfactory groove meningioma. It is assumed that peritumoral edema is related to the sudden death among the several mechanisms.
Female ; Humans

Endoscopic thoracoscopic sympathicotomy (ETS) for treatment of hyperhidrosis is usually considered as a simple and safe procedure. The complication of ETS is low and no death following ETS has ever been reported in the literature without anecdotal fatal cases. Recently, we experienced two cases of intraoperative cardiac arrest and death. Two patients are suffered from sudden cardiac arrest after transection of the left sympathetic nerve trunk by the thoracoscopic method. Vigorous cardiopulmonary resuscitations were performed but both patients are not recovered. Autopsy examinations are performed and there are no remarkable pathology.

Sudden manhood death syndrome (SMDS) is a disorder found in southeast Asia, particularly Thailand, Philippines and Japan, which causes sudden cardiac death during sleep. In Korea, SMDS cases have been occasionally encountered in forensic autopsy practice. However, the incidence and pathogenesis has been rarely studied. This study to review chronologically the proposed pathogenesis of SMDS; pathology of cardiac conduction system, sleeping and breathing disorder, K+ and thiamine deficiency, mental stress, testosterone, hyperlipidemia, and narrow circumference of coronary artery. Brugada syndrome and SMDS are phenotypically, genetically and functionally the same disorder and Brugada syndrome has been a subject of intensive study since its early description in 1992. While Brugada syndrome is an inherited cardiac disorder caused by mutations in the SCN5A gene encoding the cardiac sodium channel alpha-subunit. less than 20% of its patients are known to be associated with SCN5A mutations. Moreover, the postmortem molecular screening of SCN5A mutations on formalin fixed paraffin embbeded cardiac tissues from SMDS cases has not been rewarding due to technical problems. The role of structural heart disease and sodium channel dysfunction in the induction of electrical instability in SMDS and Brugada syndrome is still debatable.
Asia, Southeastern ; Autopsy ; Brugada Syndrome ; Coronary Vessels ; Death, Sudden, Cardiac ; Formaldehyde ; Heart Diseases ; Humans ; Hyperlipidemias ; Incidence ; Japan ; Korea ; Mass Screening ; Paraffin ; Philippines ; Respiration ; Reward ; Sodium Channels ; Testosterone ; Thailand ; Thiamine Deficiency

BACKGROUND: The epithelial mesenchymal transition (EMT) is intimately associated with tumor hypoxia. The present study was conducted to investigate the immunohistochemical relationship between hypoxic and EMT-related molecules in non-small cell lung carcinoma (NSCLC). METHODS: Immunohistochemical staining for hypoxia inducible factor (HIF)-1alpha, carbonic anhydrase (CA) IX, TWIST, and E-cadherin proteins was performed in 146 cases of NSCLC (80 cases of adenocarcinoma and 66 cases of squamous cell carcinoma) using tissue microarray blocks. RESULTS: HIF-1alpha, TWIST, CA IX, and E-cadherin were expressed in 58 (40%), 90 (62%), 82 (56%), and 36 (25%) of 146 NSCLC cases, respectively. TWIST expression was positively correlated with HIF-1alpha expression (p = 0.03) and inversely correlated with E-cadherin expression (p < 0.01). TWIST and CA IX expression were not significantly interrelated, but each showed a relationship with histological tumor grade. However, the expression of these molecules had no significant effect on clinical staging or patient survival. CONCLUSIONS: Although TWIST expression was correlated positively with HIF-1alpha expression and inversely correlated with E-cadherin, HIF-1alpha expression was not associated with E-cadherin expression. However, considering the relationship between HIF-1alpha and TWIST expression, further studies should be performed to demonstrate the role of hypoxia-induced EMT in NSCLC.
Adenocarcinoma ; Anoxia ; Cadherins ; Carbon ; Carbonic Anhydrases ; Carcinoma, Non-Small-Cell Lung ; Epithelial-Mesenchymal Transition ; Humans ; Immunohistochemistry ; Lung ; Proteins