Immunohistochemical evaluation of p27 (kip1) in pleomorphic adenomas and adenoid cystic carcinomas of the minor salivary glands.
(57/324)
BACKGROUND: p27(kip1), a universal cyclin-dependent kinase inhibitor, is a useful marker for predicting clinical aggressiveness with various human tumors. In this study, p27 expression was investigated in pleomorphic adenomas (PAs) and adenoid cystic carcinomas (ACCs) of minor salivary glands to evaluate its utility for differentiation purposes. At the same time, the correlation between p27 and ACC grading was evaluated. MATERIALS AND METHODS: Clinicopathological features of 22 patients (11 ACCs, 11 PAs), including age, sex and size of tumor were obtained from medical records. Immunohistochemical staining with p27(kip1) was performed for each specimen and p27 labelling indices were determined with a computer-assisted image-analyzing system (CAS 200). Pearson's correlation coefficient, Spearman's correlation coefficient, Students t-test, Kruskal-Wallis test and ANOVA were applied for statistical analyses using SPSS 11.5. RESULTS: p27 LIs for all PAs were above 25% whereas for ACCs they were under 25% (except one case). p27 expression (LI and intensity) was significantly lower in ACCs than PAs. The correlation between p27 expression and ACC grading was not significant. CONCLUSION: Overall, these findings suggest that reduced expression of p27 might be correlated with the development of ACC and could be an indicator of malignant behavior. (+info)
Iron-binding proteins in adenoid cystic carcinoma of salivary glands: an immunohistochemical study.
(58/324)
An immunoperoxidase staining technique was used for detecting three major iron-binding proteins (transferrin, ferritin and lactoferrin) in 54 adenoid cystic carcinomas (ACCs) of major and minor salivary glands. Twenty-three normal salivary glands were investigated for comparison. Transferrin staining was detected mainly in the intercalated duct and serous acinar cells, and was found inconsistently in the myoepithelial cells surrounding normal ductules. Ferritin was always absent in the normal epithelial component of salivary gland. The presence of lactoferrin was demonstrated in the serous acinar cells and intercalated duct cells of normal salivary tissues. Five histological patterns were found in ACC, and for the cellular components of each, it was possible to establish a special immunohistochemical profile. Transferrin positivity was detected in the small angular cells of 25 cases (48%), in the duct luminal cells of 19 cases (37%) and in the hyalinized stroma of 4 cases (8%). Ferritin staining was positive in the small angular cells of 23 cases (44%) and in the duct luminal cells of 15 cases (29%). Lactoferrin was detected in only duct luminal cells of 38 ACCs (73%). The comparative immunohistochemical analysis between transferrin and ferritin showed a similar distribution in this carcinoma. On the basis of the immunohistochemical data, lactoferrin might be used as a marker of glandular differentiation. (+info)
Detection of cancer cells in the peripheral blood and lung of mice after transplantation of human adenoid cystic carcinoma.
(59/324)
Polymerase chain reaction (PCR) targeting human beta-globin gene has been reported to be able to detect micrometastasis in an animal model. We attempted to detect cancer cells from the lung and peripheral blood in nude mice, into which a human adenoid cystic carcinoma (ACC) line (KOA-1 and KOA-1L3) had been transplanted. Positive PCR reaction was observed in the lung of a total of 19 of 47 (40.4%) mice into which KOA-1 tumor cells had been transplanted: none of 10 after 1 month, seven of 18 after 2 months, and 12 of 19 after 3 months or later. The KOA-1L3 tumor showed earlier lung metastasis, that is, two of 24 after 7 days and two of 12 after 14 days. Positive PCR reaction was confirmed in the blood samples of three of 19 mice. The lungs of these mice were positive PCR results after subcutaneous transplantation of the KOA-1 tumor. Three of four mice in these blood samples were confirmed in Positive PCR reaction after subcutaneous transplantation of the KOA-1L3 tumor similarly. The lungs of these mice were PCR positive reaction as well as the lungs of transplantation KOA-1 tumor mice. On the other hand, negative PCR reaction was showed these lungs of 60 mice after subcutaneous transplantation of the KOA-1 or KOA-1L3 tumor. All of them were showed negative PCR results in the blood samples. This experimental model can be expected to provide a more detailed understanding of ACC, as well as help to develop a therapy for metastasis of ACC. (+info)
Medullary carcinoma of the thyroid presenting as multifocal bronchial carcinoid tumour.
(60/324)
A 21 year old man presented with diarrhoea and flushing after meals and later developed miliary shadowing on his chest radiograph. Multifocal bronchial carcinoid tumour was diagnosed initially, but at necropsy metastatic medullary carcinoma of the thyroid was found. Multifocal bronchial carcinoid tumour should not be accepted as a primary diagnosis without first excluding medullary carcinoma of the thyroid because of the need to screen relatives of affected patients. (+info)
Two cases of adenoid cystic carcinoma: preoperative cytological findings were useful in determining treatment strategy.
(61/324)
Adenoid cystic carcinoma (ACC) of the breast is a rare variant of breast malignancy and is known to have an excellent prognosis. We report two cases of ACC diagnosed by preoperative fine-needle aspiration cytology (FNAC), which proved to be very useful in determining the appropriate treatment. The patients were a 57-year-old woman (case 1) and a 71-year-old woman (case 2). On physical examinations and imaging studies both tumors were recognized as lobulated tumors that measured 3.0 x 2.3 cm (case 1) and 3.9 x 3.4 cm (case 2) respectively. FNAC materials showed clusters of malignant cells surrounding globules of mucus, therefore, ACC was diagnosed. Considering the characteristics of ACC, breast-conserving surgeries with axillary dissection and adjuvant radiotherapy were performed instead of primary chemotherapy or mastectomy. Histologically, a distinctive biphasic pattern was observed that consisted of true laminae and pseudocystic spaces. Tumor sizes were 4.0 x 3.3 cm (case 1) and 4.6 x 3.8 cm (case 2), respectively, and surgical margins were negative on microscopic examination. Lymph node metastasis was not present in either case. Even though ACC is very rare, preoperative diagnosis can be made based on its characteristic features. Preoperative diagnosis is extremely useful for determining appropriate treatment. (+info)
Adenoid cystic carcinoma of the prostate gland--pathological review with a case report.
(62/324)
A case of adenoid cystic carcinoma of the prostate gland in a 38-year-old Korean man is described. Microscopically, variable patterns, that is, glandular, trabecular, cribriform and solid areas, were seen. The unusual location of this tumor in our patient highlights the ubiquitous distribution of this malignant neoplasm. (+info)
Management of salivary gland adenoid cystic carcinoma: institutional experience of a case series.
(63/324)
CONTEXT AND OBJECTIVE: Salivary gland tumor management requires long-term follow-up because of tumor indolence and possible late recurrence and distant metastasis. Adenoid cystic carcinoma (ACC) accounts for 10-15% of such tumors. The aim here was to evaluate surgical and clinical management, staging and follow-up of ACC patients in one academic institution. DESIGN AND SETTING: Retrospective study at Head and Neck Service, Universidade Estadual de Campinas. METHODS: Data on 21 patients treated between 1993 and 2003 were reviewed. Management utilized clinical staging, histology and imaging. Major salivary gland tumor extent was routinely assessed by preoperative ultrasonography. Diagnosis, surgery type, margin type (negative/positive), postoperative radiotherapy and recurrence (presence/absence) were evaluated. RESULTS: There were eleven major salivary gland tumors (52.3%), seven submandibular and four parotid. Ten patients (47.7%) had minor salivary gland ACC (all in palate), while the submandibular was the most frequently affected major one. Diagnoses were mostly via fine-needle aspiration (FNA) and incision biopsy. Frozen sections were used for six patients. There was good ultrasound/FNA correlation. Sixteen (76%) had postoperative radiotherapy. One (4.7%) died from ACC and five now have recurrent disease: three (14.2%) locoregional and two (9.5%) distant metastases. CONCLUSION: Adenoid cystic carcinoma has locally aggressive behavior. In 21 cases, of ACC, the facial nerve was preserved in all except in the few with gross tumor involvement. Treatment was defined from physical examination, imaging, staging and histology. (+info)
A case report of coexistence of a sialolith and an adenoid cystic carcinoma in the submandibular gland.
(64/324)
The occurrence of sialoliths in the submandibular gland is 80% due to the specific anatomy of both the gland and its duct. The diagnosis is rather easy because of the obvious clinical signs of the entity. Imaging studies are always necessary in order to treat the patient as effectively as possible. The stones do not tend to occur within the gland as frequently as in the respective duct. The coexistence of sialoliths and malignant tumors is extremely rare. A 70-year-old woman with intraparenchymal stone was operated in our ENT department. In addition to the sialolith the pathological examination revealed the existence of an adenoid cystic carcinoma (ACC), that extended to the neighboring skeletal muscle. This is the reason why we believe it would be useful to report this case of a large stone (14 mm in diameter) located in the submandibular gland coexisting with ACC. This case report is a very good example illustrating that all available means should be used prior to reaching a conclusion and making a health professional decision. (+info)