1/48. Multiple canalicular adenomas: a case report and review of the literature.The canalicular adenoma is an uncommon, benign salivary gland tumor that most frequently occurs in the upper lip. Rarely, it manifests itself clinically and histologically as a multifocal lesion, a feature not generally seen with other intraoral salivary gland tumors. Here we report a case of canalicular adenoma that manifested itself with 13 clinically discrete tumor masses involving the upper lip and anterior buccal mucosa. In addition to the clinical nodules, there were microscopic foci of tumor cells in the adjacent normal-appearing salivary gland tissue surrounding the tumors. This article also reviews previously reported multifocal canalicular adenomas and discusses their features, emphasizing differences in the reported growth patterns of this unusual tumor.- - - - - - - - - - ranking = 1keywords = gland (Clic here for more details about this article) |
2/48. sweat gland carcinoma of the lips.sweat gland carcinomas are extremely rare tumors with a fully malignant potential. Two cases of primary sweat gland carcinoma of the lips are presented. Because of the unique nature of this lesion, the histopathology and biologic behavior are discussed, and the pertinent literature is reviewed.- - - - - - - - - - ranking = 2keywords = gland (Clic here for more details about this article) |
3/48. Sebaceous lymphadenoma of the lip: report of a case of minor salivary gland origin.A case of sebaceous lymphadenoma occurring in the lip of a 73-year-old female is described. The patient had noticed a painless mass in the region of her upper lip for a year. The surgically removed tumor, measuring about 10 mm in diameter, was located just beneath the lip mucosa, expanding into the submucosal and muscle layer. Histologically, the tumor was well encapsulated and consisted of scattered round-shaped islands of small squamous epithelial cells with focal but apparent sebaceous differentiation in a background of lymphoid stroma. This is the first case report of sebaceous lymphadenoma of minor salivary gland origin.- - - - - - - - - - ranking = 1.6666666666667keywords = gland (Clic here for more details about this article) |
4/48. Malignant melanoma of the lip spreading in a pagetoid manner into the minor salivary glands.We describe a malignant melanoma of the lower lip that upon recurrence extended in a pagetoid manner into the ducts of the oral minor salivary glands. immunohistochemistry with antibodies to MART-1 and HMB-45 confirmed that the atypical cells in the ducts of the salivary glands were indeed melanoma cells. Pathologists involved in staging of oral melanoma are urged to look out for this previously unreported mode of spread of labial malignant melanoma.- - - - - - - - - - ranking = 2keywords = gland (Clic here for more details about this article) |
5/48. Widespread cutaneous and perioral metastases of mesothelioma.BACKGROUND: Cutaneous involvement by mesothelioma represents a rare occurrence from an uncommon neoplasm. Most cases have resulted from local extension of an underlying body cavity mesothelioma or from surgical site contamination. We could only find six previously reported cases of distant cutaneous metastases of mesothelioma. methods: We describe a case of metastatic mesothelioma involving multiple skin sites and the lip in a 64-year-old man with an underlying primary pleural mesothelioma. RESULTS: A 64-year-old man presented with a lip lesion clinically diagnosed as keratoacanthoma vs. squamous cell carcinoma. Evaluation of the lip biopsy revealed tubulo-glandular and acinar-like arrangements of plump epithelioid cells with a hobnailed appearance, vesicular nuclei, and prominent nucleoli. The initial impression of metastatic carcinoma was revised to probable mesothelioma upon discovery of a previous history of pleural mesothelioma. Positive immunohistochemical stains for anti-cytokeratin, anti-calretinin, and HBME-1 and negative stains for anti-CEA, Leu-M1, B72.3, and Ber-Ep4 confirmed the diagnosis. CONCLUSION: We report a rare example of multiple cutaneous metastases of mesothelioma. We also demonstrate the usefulness of relatively new and specific immunomarkers for mesothelioma vs. adenocarcinoma. Metastatic mesothelioma to the skin or lip is a very rare occurrence but should be considered in the differential diagnosis of malignant epithelioid neoplasms.- - - - - - - - - - ranking = 0.33333333333333keywords = gland (Clic here for more details about this article) |
6/48. Adenomatosis of minor salivary glands. Report of a case.An account is given of a patient who had multiple canalicular adenomas in the upper lip and adjacent oral mucosa. A few months after these had been excised, several more tumors of the same type developed. Microscopic examination also revealed numerous tiny foci of adenomatous proliferation within otherwise normal salivary gland lobules. We suggest that this phenomenon represents a field neoplastic change although it appears to be benign.- - - - - - - - - - ranking = 1.6666666666667keywords = gland (Clic here for more details about this article) |
7/48. Papillary cystadenoma arising from the upper lip: a case report.We report a rare case of a papillary cystadenoma arising from the upper lip. This tumor was not distinctly encapsulated and had proliferated replacing the ductal epithelium. mast cells were found not only in the stroma but also in the oncocytic epithelial layer. There was a strong immunoreaction with mitochondrial antibody in the epithelial layer. Only one case (0.9%) of papillary cystadenoma has occurred among the 110 benign intraoral salivary gland tumors seen in our hospital from 1966 through September 2003.- - - - - - - - - - ranking = 0.33333333333333keywords = gland (Clic here for more details about this article) |
8/48. Canalicular adenoma of the upper lip mimicking mucocele.salivary gland neoplasms are relatively rare. Among the salivary gland neoplasms minor salivary gland neoplasms are often deceptive to the clinician and challenging to the pathologist because of their varied morphology and diverse histopathological pattern. This article documents a case of canalicular adenoma of the upper lip mimicking mucocele and discusses the differential diagnosis of minor salivary gland neoplasms.- - - - - - - - - - ranking = 1.3333333333333keywords = gland (Clic here for more details about this article) |
9/48. Acinic cell carcinoma on the lower lip resembling a mucocele.A 64-year-old woman presented with a 2-week history of an asymptomatic mass involving the lower lip. Histopathological examination showed a well-circumscribed tumour composed of many lobules separated by thin, fibrous connective tissue. Individual lobules were composed of round or polyhedral tumour cells, which had a characteristic finely granular and vacuolated cytoplasm and eccentric hyperchromatic nuclei. Positive staining was observed with periodic acid-Shiff, and immunohistochemistry for cytokeratin, alpha-1 antitrypsin, and S-100 protein resulting in a final diagnosis of acinic cell carcinoma. Acinic cell carcinoma represents a well-established, although uncommon, entity in the classification of neoplasms of salivary gland origin. The parotid salivary gland is the most frequent site of acinic cell carcinoma, whereas the lip is a particularly unusual site. The unusual presentation of this tumour may lead to confusion with a mucocele. Given these findings, we suggest that acinic cell carcinoma should be considered in the differential diagnosis of any mucocele-like mass on the lower lip.- - - - - - - - - - ranking = 0.66666666666667keywords = gland (Clic here for more details about this article) |
10/48. Giant myoepithelioma of the upper lip.myoepithelioma is a relatively rare form of salivary gland tumor composed entirely of myoepithelial cells. This tumor was formerly considered to be a subtype of pleomorphic adenoma; however, in the latest world health organization classification of 1991 it is listed as an independent entity. We report herein an extremely rare case of myoepithelioma of the upper lip. A 78-year-old Japanese female presented with a huge, painless mass on her upper lip. CT and MRI revealed a 50 x 40 mm(2) well-defined ovoid tumor. A benign minor salivary gland tumor was clinically suspected, and the patient underwent complete resection of the tumor under general anesthesia. The surgical defect was immediately reconstructed using an Abbe-Estlander flap. The tumor was histopathologically diagnosed as a benign myoepithelioma of the minor salivary gland. Immunohistochemically, the tumor cells were positive for vimentin, cytokeratins, alpha-smooth muscle actin and S-100 protein, confirming the morphological diagnosis of myoepithelioma. The patient's postoperative clinical course was uneventful, and satisfactory results were obtained both functionally and esthetically. The pathology, clinical manifestations and treatment of myoepithelioma are reviewed.- - - - - - - - - - ranking = 1keywords = gland (Clic here for more details about this article) |
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