Hideki Maegawa

Benign Cystic Teratoma of the Parotid Gland: A Case Report

BACKGROUND Mature cystic teratomas of the major salivary glands are rare. This report describes a case of a mature cystic teratoma of the left parotid gland, including the cytologic and histopathologic findings. CASE A 17-year-old young woman presented with a slow-growing left parotid mass that had been present for 4 years. Preoperative fine needle aspiration cytology showed the presence of acinar and ductal cells, foamy cells and multinucleated giant cells. Imprint cytology of the surgical material showed the presence of some squamous cells and sebaceous gland-like cells with hair shafts. Cellular atypia was inconspicuous. Grossly, the 3-cm lesion was unicystic and embedded within the parotid gland parenchyma. Microscopically, the inner surface of the cyst was lined with keratinized squamous epithelium. The cyst wall contained skin adnexa such as sebaceous, eccrine and apocrine glands, as well as hair follicles. Some mature cartilage tissue was also detected. Foreign body granulomatous change was seen focally. No immature tissue or malignant transformation was found. CONCLUSION There is no previous report describing the cytologic findings of a mature cystic teratoma of the parotid gland. Mature cystic teratomas should therefore be considered in the differential diagnosis of a cystic lesion of the parotid

Sarcomatoid salivary duct carcinoma of the submandibular gland: a case report.

BACKGROUND Sarcomatoid salivary duct carcinoma (sarcomatoid SDC) is a rare subtype of SDC. We encountered 1 case of sarcomatoid SDC that developed from a submandibular gland pleomorphic adenoma, and we herein report our findings. CASE A 42-year-old female had tumentia and pain in the right submental area, and therefore she underwent a close examination, wherein a right submandibular gland neoplasm was detected. Surgery for removing the right submandibular gland was performed in addition to neck dissection. Cytology showed typical findings of conventional SDC. Moreover, isolated and scattered large spindle cells and multinucleated cells were also detected along with atypical epidermal cell clumps showing keratinization. From a histologic perspective, it appeared to be sarcomatoid SDC that developed from a pleomorphic adenoma and also involved a squamous cell carcinoma component. CONCLUSION This is the first report on the cytologic findings ofa case of sarcomatoid SDC with a squamous cell carcinoma component. When sarcomatoid cells appear in the cytology along with findings of typical SDC, sarcomatoid SDC should thus be considered. Furthermore, squamous cell carcinoma component may be involved as in the present case, so it is necessary to be aware of the possibility thereof.

Cytology of pleural effusion associated with disseminated infection caused by varicella-zoster virus in an immunocompromised patient. A case report.

BACKGROUND Pleural effusion caused by varicella-zoster virus (VZV) is rare. We report a case of a woman with acute lymphocytic leukemia (ALL) who developed a pleural effusion caused by VZV infection. CASE A 55-year-old woman with ALL treated with consolidation therapy developed skin vesicles and a pleural effusion. Pleural fluid smears contained numerous mesothelial cells, which had ground-glass nuclei or eosinophilic nuclear inclusions. Some multinucleated giant cells were also seen. Electron microscopic examination revealed intranuclear virus particles, about 150 nm in diameter, in some mesothelial cells. Tissue samples from the skin, lungs, pleura, liver, pancreas, kidneys and gastrointestinal tract, obtained at autopsy, contained many virus-infected cells. They were positive for VZV glyco-protein 1 by immunohistochemistry. CONCLUSION VZV infection should be considered in the differential diagnosis of an unexplained exudative pleural effusion, especially in immunocompromised hosts.

Collagenous Spherulosis Associated with Adenomyoepithelioma of the Breast

BACKGROUND Collagenous spherulosis (CS) associated with an adenomyoepithelioma (AME) of the breast is rare. This report describes a case of CS associated with an AME of the right breast, including the cytologic and histopathologic findings. CASE A 51-year-old female presented with a slow-growing left breast mass that had been present for 5 months. A preoperative core needle biopsy showed the presence of layers or sheaths of myoepithelial cells around epithelial-lined spaces. Imprint cytology of the surgical material showed the presence of bundles of spindle cells with an admixture of epithelial cells. Spherical structures were also found. They were translucent or slightly light green with Papanicolaou staining and metachromatic with Giemsa staining. Grossly, the 1.5-cm lesion was solid and embedded within the breast parenchyma. Microscopically, it was composed of spindle or polygonal cells with eosinophilic cytoplasm and an epithelium lining spaces with many spherical structures. The spindle or polygonal cells were positive for myoepithelial markers and the epithelium was positive for epithelial markers by immunohistochemistry. CONCLUSION There is no previous report describing the cytologic findings of CS associated with an AME of the breast. AMEs should therefore be considered an underlying pathology of CS of the breast.

Cytological Features of Carcinosarcoma ex Pleomorphic Adenoma of the Parotid Gland: A Case Report

Background: Carcinosarcoma of the salivary gland is an extremely rare tumor composed of carcinomatous and sarcomatoid components. This report describes the cytological and pathological findings of a case of carcinosarcoma ex pleomorphic adenoma arising in the right parotid gland. Case: A 47-year-old female visited a hospital with swelling of the right parotid region, slight pain and facial palsy. Fine-needle aspiration smears showed both clustered epithelium-like cells and singly scattered cells in a necrotic background. The cells, especially the latter, exhibited significant cellular pleomorphism and had irregularly shaped nuclei. Myxoid stroma-like cell clusters without cellular atypism were also seen. The right parotid gland was resected, and the tumor tissue was histologically diagnosed as carcinosarcoma ex pleomorphic adenoma. Conclusion: The cytological findings of carcinosarcoma ex pleomorphic adenoma have been reported in very few cases. In the present case, various components, including the presence of atypical epithelium-like cell clusters and singly scattered atypical cells with stromal components on cytological specimens, led to consideration of the diagnosis of carcinosarcoma ex pleomorphic adenoma.

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