涎腺上皮性肿瘤1282例病理组织学分类及临床资料统计

作者对1282例涎腺上皮性肿瘤的病理组织学分类和临床发病情况进行了统计分析。结果表明,涎腺腺瘤723例,占56.4％;涎腺癌559例,占43.6％。多形性腺瘤居涎腺腺瘤首位,粘液表皮样癌为最常见的涎腺癌。除Warthin瘤男性明显多于女性外,涎腺上皮性肿瘤的性别分布无明显差异;涎腺腺瘤的发病年龄较涎腺癌相对年轻,但差异不显著;涎腺腺瘤多发于大涎腺,涎腺癌多发于小涎腺。     

涎腺上皮性肿瘤1282例病理组织学分类及临床资料统计

作者对１２８２例涎腺上皮性肿瘤的病理组织学分类和临床发病情况进行了统计分析，结果表明，涎腺腺瘤７２３例，占５６．４％；涎腺癌５５９例，占４３．６％，多形性腺瘤居涎腺腺瘤首位，粘液表皮样癌为最常见的涎腺癌。除Ｗａｒｔｈｉｎ瘤男性明显多于女性外，涎腺上皮肿瘤的性别分布无明显差异，涎腺腺瘤的发病年龄较涎腺癌相对年轻，但差异不显著，涎腺腺瘤多发于大涎腺，涎腺癌多发于小涎腺。     

2489例涎腺上皮性肿瘤临床病理分析

目的:了解涎腺上皮性肿瘤的临床病理特点。方法:对2489例涎腺上皮性肿瘤临床病理资料进行统计分析。结果:涎腺恶性上皮性肿瘤840例,腺样囊性癌、黏液表皮样癌、癌在多形性腺瘤中居其前3位;涎腺良性上皮性肿瘤1649例,多形性腺瘤、Warthin瘤、基底细胞腺瘤居其前3位。涎腺恶性、良性上皮性肿瘤男女之比为1.13∶1和0.99∶1;平均发病年龄47.86岁和44.86岁;腮腺和腭部为好发部位。结论:腺样囊性癌和多形性腺瘤是最常见的涎腺恶性、良性上皮性肿瘤。     

大涎腺上皮性肿瘤212例临床分析

目的 总结大涎腺上皮性肿瘤的临床特点,指导临床实践。方法 按照WHO 1991年涎腺肿瘤组织学分类标准,对212例经病理确诊的大涎腺上皮性肿瘤进行回顾性临床分析,讨论良、恶性肿瘤的不同临床特征。结果 212例肿瘤中,腺瘤166例(78.3％),以多形性腺瘤为主;涎腺癌46例(21.7％),以腺样囊性癌最多见。腮腺是最主要发病部位。涎腺腺瘤临床多表现为无痛性肿块,涎腺癌常伴有疼痛和(或)神经麻痹等症状。结论 大涎腺良、恶性肿瘤具有不同的临床特征,有助于临床正确诊断。     

癌基因c—erbB—2在涎腺肿瘤中的表达

作者利用抗c-erbB-2单克隆抗体,用免疫组化的方法,对50例涎腺肿瘤(腺癌,涎腺导管癌、粘液表皮样癌、腺样囊性癌、多形性腺瘤各10例)进行癌基因、c-erbB-2的检测。不同种类的涎腺肿瘤,其c-erbB-2的表达很不一致。腺癌及涎腺导管癌的阳性表达率较高,粘液表皮样癌及多形性腺瘤较低,腺样囊性癌为阴性。c-erbB-2的表达与肿瘤分化度有一定关联,涎腺肿瘤组织形态学的多样性,可能与c-erbB-2的表达不同有关。     

涎腺肿瘤3461例临床病例分析

目的 :了解涎腺肿瘤发病情况、构成特点及发展趋势。方法 :对四川大学华西口腔医院 195 5～ 2 0 0 2年间收治的 3 461例涎腺肿瘤临床资料进行回顾性分析。结果 :良恶性的平均发病年龄分别是 41.3 8岁和 45 .2 0岁 ,良恶性的男女之比分别是 0 .99∶1和 1.3 4∶1。腮腺、腭部的小涎腺和颌下腺分别列为涎腺肿瘤原发部位前3位 ;多形性腺瘤、腺淋巴瘤、基底细胞腺瘤与粘液表皮样癌、腺样囊性癌、腺癌分别列为良、恶性肿瘤前三位。结论 :涎腺肿瘤发病有增加的趋势 ;男性患者的构成比恶性肿瘤高于良性 ;女性患者构成比有增加趋势 ;腮腺和腭部分别是大、小涎腺肿瘤的高发部位 ;多形性腺瘤和粘液表皮样癌是最常见的涎腺良、恶性肿瘤。     

303例颌下腺肿瘤临床病理分析

目的：了解颌下腺肿瘤的组织学类型、构成比及发病性别、年龄、体积、复发等临床病理特征。方法：对303例颌下腺肿瘤临床病理资料进行统计分析。结果：良性上皮性肿瘤216例（71.29%）,恶性上皮性肿瘤79例（26.07%）,软组织肿瘤6例（1.98%）,淋巴造血系统肿瘤2例（0.66%）。多形性腺瘤、肌上皮瘤和Warthin瘤居良性上皮性肿瘤的前3位,腺样囊性癌、癌在多形性腺瘤中、黏液表皮样癌和腺泡细胞癌居恶性上皮性肿瘤的前4位。良、恶性上皮性肿瘤的男女比为0.79∶1和1.82∶1;平均年龄为37.5岁和47.8岁;平均直径为2.55 cm和3.43cm。颌下腺肿瘤复发率为6.93%,复发性多形性腺瘤占76.19%。结论：多形性腺瘤和腺样囊性癌分别是最常见的良、恶性上皮性肿瘤;良性上皮性肿瘤多见于女性,恶性上皮性肿瘤多见于男性;恶性上皮性肿瘤的发病年龄和体积均大于良性;多形性腺瘤易复发。     

单侧腮腺不同类型良性肿瘤1例

腮腺是唾液腺中最大的腺体，肿瘤多见于良性肿瘤，其中多形性腺瘤（pleomorphic adenoma）又名涎腺混合瘤，在涎腺肿瘤中最为常见，由肿瘤性上皮、粘液及软骨样基质组成，属于临界瘤，可以单发或合并其他类型的涎腺肿瘤同时发生，本院收治l例腮腺多形性腺瘤合并Warthin瘤患者，结合国内外相关文献进行回顾，讨论该疾病的组织来源、诊断及治疗。     

615例小涎腺上皮性肿瘤的临床病理分析

目的　探讨小涎腺上皮性肿瘤的临床病理特点。方法　对615例小涎腺上皮性肿瘤的部位分布、发病年龄、性别及组织学类型进行回顾性分析。结果　615例小涎腺上皮性肿瘤中腺瘤265例,癌350例,良恶性肿瘤之比为1∶1·3。良性肿瘤中以多形性腺瘤最为常见(81·1%),其次为肌上皮瘤(14·7%)。恶性肿瘤中以腺样囊性癌最常见(32·9%),其次为粘液表皮样癌(21·4%),腺癌(11·7%)。小涎腺上皮性肿瘤以腭部最为好发,分别占良、恶性肿瘤的77·0%和60.0%。腺瘤中女性患者(51·3%)稍多于男性(48·7%);小涎腺癌患者中男性(56·3%)多于女性 (43·7%)。小涎腺腺瘤患者平均发病年龄40·9岁,小涎腺癌平均发病年龄49·1岁,恶性肿瘤的发病年龄显著高于良性肿瘤(P<0·05)。结论　小涎腺上皮性肿瘤在病理类型构成比、部位、年龄、性别分布上具有其独到的特点。     

儿童涎腺上皮性肿瘤的临床研究

目的：探讨儿童涎腺上皮性肿瘤的发病特点及诊疗要点,方法：对４５例病理证实的１６岁以下儿童涎腺上皮性肿瘤患者的临床资料进行统计分析。结果：儿童涎腺上皮性肿瘤,男女之比为１．１４：１,发病平均年龄为１０．３４岁,随着年龄的增大,患病比随之增高,但年龄越小患病性肿瘤的可能性愈大,且恶性程度愈高;发病部位以腮腺、颌下腺及腭部多见,大小涎腺间良恶性肿瘤患病比无明显差别：良性肿瘤以多形性腺瘤常见,恶性肿瘤以粘     

Atypical features in pleomorphic adenoma--a clinicopathologic study and implications for management

Pleomorphic adenoma is the most common salivary gland neoplasm and infrequently undergoes malignant transformation. Carcinoma ex pleomorphic adenoma is typically an infiltrative neoplasm with features of cellular pleomorphism, high mitotic activity, peri-neural and vascular invasion. More recently, sub-groups of pleomorphic adenoma have been described exhibiting vascular invasion and features of malignancy without evidence of extra-capsular extension. There is little information in the literature regarding how these different histological variants influence clinical presentation and outcome following primary treatment. Following a review of 100 consecutive pleomorphic adenomas removed from the major salivary glands, 4 cases with atypical histological features were found. Three tumours exhibited features of dysplasia/carcinoma without evidence of extra-capsular invasion and a further case demonstrated benign vascular invasion. There were no clinical features suggestive of the atypical nature of these neoplasms, though fine needle aspiration cytology (FNAC) was suspicious of a malignancy in 2 cases and CT scan in 1 case. Patients underwent a superficial parotidectomy or submandibular gland excision based on the location of the lesion. All lesions were completely excised and there were no recurrences in this series.     

下颌下腺非侵袭性恶性多形性腺瘤1例报告

唾液腺非侵袭性恶性多形性腺瘤(Ca-ex-PA)又称发生在多形性腺瘤中的原位癌,是较少见的病理类型,临床表现与良性多形性腺瘤相似,有条件完整切除肿瘤,复发或转移少见,预后良好.本文报告1例下颌下腺非侵袭性多形性腺瘤的临床病理学特征,认为鉴别非侵袭性Ca-ex-PA和侵袭性Ca-ex-PA对判断预后十分重要,并影响治疗方案的选择,WHO对唾液腺多形性腺瘤恶变的分型在肿瘤的生物学行为和预后方面具有实际意义.     

Pleomorphic Adenoma of Minor Salivary Gland in a 14 year Old Child

Salivary gland tumours are rare in childhood, and almost all of them occur in parotid gland. Minor salivary gland tumours are even rarer, pleomorphic adenoma being the most frequently found tumour. Only seventeen cases of pleomorphic adenoma arising in the minor salivary gland tumour have been reported in children and adolescents. Pleomorphic adenoma of minor salivary gland represents about 45% of all the tumours of the minor salivary glands. Pleomorphic adenoma is slowly enlarging tumour indistinguishable from adenoid cystic carcinoma clinically, except for pain and ulceration, which is more common in the latter. Carcinoma arising from pleomorphic adenoma has been reported in 3% cases amongst the minor salivary gland tumours. This report presents a case of pleomorphic adenoma of minor salivary gland in a 14 year old female patient with a brief review of literature.     

PCNA, Ki-67 and p53 expressions in submandibular salivary gland tumours

Salivary gland tumours are uncommon with a broad heterogeneity. The most common benign tumour is the pleomorphic adenoma, whereas mucoepidermoid carcinoma and adenoid cystic carcinoma predominate among the malignancies. Most salivary gland tumours occur in the parotid, and consequently clinical and biological data are normally derived from this site. This work describes the expressions of PCNA, Ki-67 and p53 in 15 pleomorphic adenomas, 15 mucoepidermoid carcinomas and 15 adenoid cystic carcinomas of the submandibular gland. Our results showed that all pleomorphic adenomas were negative for p53 and Ki-67 with 66.6% being positive for PCNA. Conversely, p53 was positive in 53% of the mucoepidermoid carcinomas and in 20% of the adenoid cystic carcinomas. Ki-67 was expressed in 47.7% of the mucoepidermoid carcinomas and 40% of the adenoid cystic carcinomas. All malignant tumours were positive for PCNA. These results indicate that the proliferative rate analysed with PCNA and Ki-67 and the expression of p53 in pleomorphic adenoma and adenoid cystic carcinoma of the submandibular gland were similar to those described in the parotid and minor salivary glands. However, mucoepidermoid carcinomas showed higher expression of these markers than those of other salivary glands. This work is the first describing the expression of these immunohistochemical markers exclusively in submandibular salivary gland tumours.     

Metastasizing “benign” pleomorphic salivary adenoma: A dramatic case-report and literature review

Pleomorphic salivary adenomas are the most common benign neoplasms affecting the salivary glands. Very occasionally however, metastatic lesions are identified in patients with a history of PSA, which, on detailed pathological evaluation, are found to exhibit all the histological hallmarks of the preceding benign lesions.Diagnosis of benign metastasizing pleomorphic adenoma of the salivary gland is extremely rare and still under debate.We present the first case-report in literature of multiple metachronous nasal cavity, scalp and encephalic metastases of a pleomorphic adenoma of the parotid gland in a young girl.     

Maintaining a high level of suspicion for recurrent malignant disease: report of a case with periapical involvement

Aim: To report the unusual endodontic presentation and radiographic features of a subgroup of pleomorphic adenoma called carcinoma ex pleomorphic adenoma and to stress the importance of maintaining a high level of suspicion in cases where primary or recurrent neoplasia is included in the differential diagnosis. SUMMARY: This paper describes a case in which a patient with a previous history of malignant neoplasm presented with signs and symptoms similar to a dental infection. The pathology report however confirmed recurrence of the previous tumour in a malignant fashion. The importance of maintaining a high level of suspicion in early management of such disease is highlighted. KEY LEARNING POINTS: *Pleomorphic adenomas, also known as benign mixed tumours, are common salivary gland tumours, which infrequently undergo malignant transformation, with potentially devastating consequences. *Malignant salivary gland tumours can present as dental swelling, dental pain and sudden loss of vitality of teeth so both general practitioners and specialists have the responsibility to evaluate such patients with a broad vision. *Radiographic differential diagnosis of periapical radiolucency should also include malignant salivary gland tumours. *This case highlights the need of vigilance at all times and emphasizes the benefits of biopsy and histological examination in the diagnosis of recurrent malignant salivary gland tumours.     

Epidermal growth factor receptor immunoexpression evaluation in malignant salivary gland tumours

Objective:  The aim of this study was to determine epidermal growth factor receptor (EGFR) expression in malignant salivary gland tumours and its possible relationships with clinical and morphological findings, disease course and prognosis.
Patients and methods:  The study sample comprised 88 patients diagnosed and treated for primary malignant salivary gland tumours between January 1992 and December 2002. We analysed EGFR expression using immunohistochemistry on formalin-fixed, paraffin embedded surgical specimens of all patients. Statistical analysis was used to investigate possible relationships between EGFR expression and clinical findings, histological findings, disease course and patients survival.
Results:  Of all cases, 32 (36.4%) were EGFR positive. There was a statistically significant correlation between EGFR expression and histological grade. No other variable was correlated with EGFR expression including the overall and disease-free survival. Stage classification was the only parameter in multivariate analysis that was an independent predictor of low overall and disease-free survival.
Conclusion:  EGFR is not a useful indicator of prognosis in malignant salivary gland tumours. However, the EGFR expression in salivary gland cancers like adenocarcinomas, undifferentiated carcinomas, mucoepidermoid carcinomas or salivary duct carcinomas suggests that these tumours may be a candidate for therapy investigation directed at EGFR.     

DNA ploidy analysis in salivary gland tumours by image cytometry

AIM: To determine whether DNA ploidy by image cytometry is a good diagnostic tool to distinguish benign and malignant salivary gland tumours. METHODS: A total of 62 salivary gland tumours were studied. Cases were histologically diagnosed [haematoxylin and eosin (H&E)]. According to the World Health Organization (WHO) classification, there were 14 mucoepidermoid carcinomas (MEC), 11 adenoid cystic carcinomas (ACC), 10 pleomorphic adenomas (PA), 10 carcinoma ex PA (CEPA), 9 acinic cell carcinomas (ACCa), 3 polymorphous low-grade adenocarcinomas (PLGA), 2 papillary cystadenocarcinomas (PC), 1 myoepithelial carcinoma (MC), 1 undifferentiated carcinoma (UC) and 1 mucinous adenocarcinoma (MA). Paraffin sections (40 microm) were micro-dissected to isolate tumour areas; cell nuclei were extracted and Feulgen-stained cytospin monolayers were analysed using a DNA image cytometry system. For each case, DNA index (DI) was calculated relative to internal controls (lymphocytes; DI=1.0). Cases were categorized as diploid or aneuploid and the proportion of cells over 5c was also calculated. RESULTS: Fifty-three of 62 salivary gland tumours were uniformly diploid. Only nine cases were aneuploid: five CEPA, one low-grade MEC, one PC, one UC and one MA. CONCLUSIONS: The vast majority of salivary gland tumours were diploid. High-grade malignancies may be aneuploid, and ploidy may be useful to identify malignant change in atypical PA. Further, larger studies are needed to confirm our results and to further evaluate the usefulness of the technique in high-grade lesions.