1/20. Intraductal papillary carcinoma of the parotid gland with low malignancy.A peculiar case of papillary carcinoma arising in the parotid gland is reported. A 68-year-old woman presented with a right, painless, parotid mass, measuring approximately 3 cm in greatest diameter. A conservative parotidectomy was performed. Histologically, the neoplasm showed exophytic papillary projections into a cavity. The cells were focally suggestive of epidermoidal differentiation, whereas a transitional differentiation was noted in other portions, as in bladder papilloma. Immunohistochemical studies showed strong positivity of the neoplastic cells for cytokeratin and weak positivity for PCNA and Mib-1. We classified this neoplasm among the papillary tumors with a low-grade of malignancy.- - - - - - - - - - ranking = 1keywords = cavity (Clic here for more details about this article) |
2/20. Metastatic cardiac papillary carcinoma originating from the thyroid in both ventricles with a mobile right ventricular pedunculated tumor.A 62-year-old man with a history of surgical therapy for papillary thyroid carcinoma was admitted because of chest pain, dyspnea on effort, pretibial edema, and slight fever. An electrocardiogram showed ST segment elevation in the precordial leads and low voltage in the limb leads. A large solid mass was demonstrated in both ventricles, with pericardial effusion, by echocardiography, thoracic computed tomography scan, transesophageal echocardiography, and angiography. A punch biopsy of the tumor revealed metastatic papillary carcinoma. During radiation therapy, the patient suddenly died of ventricular fibrillation. At autopsy, the tumor occupied almost the entire right ventricular cavity, expanding toward the main trunk of the pulmonary artery with a mobile peduncle and it had infiltrated the left ventricular wall through the interventricular septum. Microscopic examination confirmed metastatic papillary thyroid carcinoma. Only 2 other cases of cardiac metastases of papillary thyroid carcinoma have been reported and this case is the first report of metastases in both ventricles with a mobile right ventricular pedunculated tumor.- - - - - - - - - - ranking = 1keywords = cavity (Clic here for more details about this article) |
3/20. Encapsulated cystic papillary variant of medullary carcinoma of thyroid gland.Papillary variant of medullary carcinoma of the thyroid (MCT) is an unusual histologic pattern with some diagnostic difficulties. A case of encapsulated papillary variant of MCT with extensive cystic appearance is reported. A euthyroid, 43-yr-old woman with bone pain was incidentally found to have a 4.0-cm solitary, cold nodule on her left thyroid lobe. Histopathologic examination revealed an encapsulated tumor composed of a large cystic cavity with small papillary projections. The papillae were lined by multiple layers of neoplastic cells with small and regular nuclei containing condensed chromatin and lacking the characteristic "ground glass" appearance of the papillary carcinoma of the thyroid gland. Immunohistochemical studies revealed specific cytoplasmic staining of the tumor cells for calcitonin, chromogranin a, neuron-specific enolase, carcinoembryogenic antigen, and cytokeratin. Specific staining for thyroglobulin was not observed in any neoplastic cell. Staining with congo red disclosed amyloid deposits within the stroma. The case was diagnosed as papillary variant of MCT. Medullary thyroid carcinomas may show a papillary pattern with a totally cystic gross appearance. Thyroid carcinomas should be classified according to their major immunoreactivity pattern rather than their morphologic pattern. Immunohistochemical and/or histochemical studies should be performed in all thyroid tumors that show unusual histologic features.- - - - - - - - - - ranking = 1keywords = cavity (Clic here for more details about this article) |
4/20. Metastatic papillary thyroid carcinoma of the submandibular lymph nodes with extensive squamous metaplasia: report of a case.We report a unique case of metastatic papillary thyroid carcinoma of the submandibular lymph nodes with extensive squamous metaplasia. A 48-year-old man was referred to our hospital for treatment of a thyroid tumor and right submandibular masses. A tumor, 2 cm in its largest dimension, was palpated in the right lobe of the thyroid gland. The masses in the submandibular region measured up to 3 cm in diameter. Each submandibular tumor had a cystic cavity containing slightly opaque fluid. Aspiration cytology of the thyroid established a diagnosis of papillary carcinoma. Aspirated material from the cystic cavity of one of the submandibular masses contained only keratinized material with a thyroglobulin level of 175 ng/ml. The patient underwent a total thyroidectomy with modified radical neck dissection. Microscopic examination of the resected specimen confirmed a diagnosis of papillary carcinoma of the thyroid, as well as well-differentiated squamous cell carcinoma with cystic changes in the submandibular lymph nodes. Focal immunoreactivity for thyroglobulin, combined with the absence of any other possible primary lesions in the head and neck region, suggested metastatic papillary thyroid carcinoma of the submandibular lymph nodes with extensive squamous metaplasia.- - - - - - - - - - ranking = 2keywords = cavity (Clic here for more details about this article) |
5/20. Unusual presentation of verrucous carcinoma of maxillary antrum.Verrucous carcinoma is a rare type of squamous cell carcinoma that is most often seen in the oral cavity and larynx. This paper describes a case report of a rare tumor with an unusual presentation. This patient presented with recurrent pyoceles and was diagnosed by chance. carcinoma of maxilla is rarely diagnosed until the bony walls are eroded. This condition should be kept in mind in patients presenting with recurrent pyocele and a biopsy carried out from the maxilla.- - - - - - - - - - ranking = 18.995457063712keywords = oral cavity, cavity (Clic here for more details about this article) |
6/20. Multiple primary malignancies: synchronous and metachronous presentation--case report.Reporting three rare cases of multiple primary cancers. Case one and two were a synchronous presentation of primary gastric carcinoma and renal carcinoma, gastric carcinoma and papillary carcinoma thyroid. Case 3 was metachronous presentation of squamous cell carcinoma of the oral cavity and hepatocellular carcinoma.- - - - - - - - - - ranking = 18.995457063712keywords = oral cavity, cavity (Clic here for more details about this article) |
7/20. Spigelian hernia with unusual content.We present a case of a primary tumor of the peritoneum that manifested as a spigelian hernia in a 74-year-old woman. multidetector computed tomography showed a large heterogeneous mass located subcutaneously on the right spigelian line connected to the abdominal cavity. We found no previous report describing a primary peritoneal tumor in a spigelian hernia.- - - - - - - - - - ranking = 1keywords = cavity (Clic here for more details about this article) |
8/20. Verrucous carcinoma of the maxillary antrum.Verrucous carcinoma is a rare variant of squamous cell carcinoma which occurs most frequently in the oral cavity and larynx. In this article we describe a patient with verrucous carcinoma of the maxillary antrum, and present a review of the literature.- - - - - - - - - - ranking = 18.995457063712keywords = oral cavity, cavity (Clic here for more details about this article) |
9/20. Verrucous carcinoma of the maxillary antrum.Verrucous carcinoma is a rare type of squamous cell carcinoma which is most often seen in the oral cavity and larynx. This paper describes a case of verrucous carcinoma of the maxillary antrum, a site in which this tumour has been described on only two previous occasions in the English language literature.- - - - - - - - - - ranking = 18.995457063712keywords = oral cavity, cavity (Clic here for more details about this article) |
10/20. Solitary intraoral keratoacanthoma. Report of a case.The keratoacanthoma is a tumorlike proliferation which is rarely seen in the oral cavity. Both clinically and microscopically, it may bear close resemblance to squamous-cell carcinoma. The following article discusses the keratoacanthoma and, in addition, presents a case report of solitary intraoral keratoacanthoma.- - - - - - - - - - ranking = 18.995457063712keywords = oral cavity, cavity (Clic here for more details about this article) |
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