Recurrent pleomorphic adenoma of the parotid gland: analysis of 108 consecutive patients

BACKGROUND: Surgery for recurrent parotid pleomorphic adenoma is a challenging problem. METHODS: One hundred eight patients who underwent 134 reoperations for recurrent parotid pleomorphic adenoma (follow-up, 22 years) were evaluated for histopathologic features and risk factors for recurrence. RESULTS: The number of reoperations for tumor recurrence ranged from 1 to 10. Twenty-seven patients (25%) developed permanent facial nerve weakness. The risks for clinically evident rerecurrence after 1, 5, and 15 years were 16%, 42%, and 75%, respectively. Female sex, young age at initial treatment, and enucleation instead of parotidectomy for treatment of the first recurrence were significant risk factors for rerecurrence. The mean number of recurrent tumor nodules was 26. CONCLUSIONS: Surgery for recurrent parotid pleomorphic adenoma has a high rate of facial nerve morbidity. The chance of rerecurrence is high. Extended parotidectomy seems to be the best approach for the reoperation to reduce the risk of rerecurrence.     

The role of the le fort I maxillotomy in the management of incompletely resected pituitary macroadenomas.

Objective: The options available for the treatment of a nonsecreting pituitary macroadenoma that has been incompletely resected include reoperation, fractionated radiation therapy, and radiosurgery. Reoperation in this setting may be hindered by the same obstacles that prevented a complete resection during the initial surgical procedure, and should prompt consideration of an alternate approach or exposure. Methods: Between January 1998 and December 2003, 10 consecutive patients were referred to the Department of Neurosurgery at the University of Texas Southwestern Medical Center for the evaluation of a nonsecreting pituitary macroadenoma that measured 3 cm or greater in diameter despite having undergone an attempt at a complete resection elsewhere. Each of these patients was reoperated using a Le Fort I maxillotomy to enhance the exposure provided by a traditional transsphenoidal approach. Results: A total or near total (> 95%) resection was achieved in each case. One patient required reoperation for the repositioning of a fat graft to treat a cerebrospinal fluid fistula and one patient experienced a worsening of anterior pituitary function postoperatively. Five patients noted improved vision and no patient experienced further visual loss. Three patients have required subsequent treatment of small foci of recurrent or progressing tumor with stereotactic radiation therapy. No patient has received fractionated radiation therapy. Conclusion: The added exposure provided by a Le Fort I maxillotomy facilitates the resection of pituitary macroadenomas that have been incompletely resected by a traditional transnasal, trans-sphenoidal approach.     

Modified partial superficial parotidectomy versus conventional superficial parotidectomy improves treatment of pleomorphic adenoma of the parotid gland

Background

Surgical treatment of pleomorphic adenoma of the parotid gland remains a subject of major debate. The investigators compared postoperative complications and surgical parameters between modified partial superficial parotidectomy and conventional superficial parotidectomy.

Methods

Clinical records of 129 patients were reviewed and analyzed for clinical characteristics.

Results

Compared with the conventional superficial parotidectomy group, the modified partial superficial parotidectomy group had significantly lower rates of auricular numbness, Frey's syndrome, and obvious facial asymmetry (all P values <.05). The distance between the primary tumor capsule and satellite nodules ranged from .06 to 8.48 mm, and the greatest distance between the primary tumor capsule and satellite nodules was observed in tumors >4 cm. Furthermore, satellite nodules were more common in tumors >4 cm than in tumors <2 cm or tumors between 2 and 4 cm (all P values <.05).

Conclusions

Modified partial superficial parotidectomy compares favorably surgically and clinically with conventional superficial parotidectomy in certain patients.     

MMP-3在大肠腺瘤及大肠癌中的表达与临床意义

为探讨基质金属蛋白酶3（MMP-3）在大肠腺瘤及大肠癌中的表达与临床病理参数间的相关性,应用免疫组织化学方法检测MMP-3在20例大肠腺瘤和60例大肠癌中的表达。结果显示,（1）MMP-3在20例大肠腺瘤及60例大肠癌中,阳性表达率分别为10％和41．7％（P=0．031）。（2）MMP-3的阳性表达与淋巴结转移（P=0．017）呈正相关,与预后呈负相关。结果表明,MMP-3的上调表达可能参与了大肠癌的发生、发展、浸润及转移,对临床上判断预后具有较大意义。     

显微镜下经单鼻孔蝶窦入路切除垂体腺瘤

目的评价显微镜下经单鼻孔蝶窦入路切除垂体腺瘤的疗效. 方法采用经单鼻孔蝶窦入路行垂体腺瘤切除术20例,其中微腺瘤8例(<10 mm),小腺瘤8例(10～20 mm),中腺瘤3例(20～30 mm),大腺瘤1例(>30 mm);PRL腺瘤9例,GH腺瘤6例,ACTH腺瘤5例. 结果本组20例无并发症,平均随访5(2～10)个月,患者临床症状较术前均有不同程度改善,手术效果良好. 结论经单鼻孔蝶窦入路垂体瘤切除术效果好,术中损伤小,患者痛苦少,术后康复快,没有或较少出现并发症.     

Multiregional sampling reveals a homogenous distribution of Ki-67 proliferation rate in pituitary adenomas

Summary. Ki-67 antigen is used as a marker of proliferative activity that is linked to growth rate, invasiveness and prognosis of pituitary adenomas. So far the distribution of Ki-67 index within an individual adenoma has not been investigated. If Ki-67 antigen expression differs significantly within an individual pituitary adenoma, a sampling error may result when assessing small fragments of adenoma tissue. Such a potential error would diminish the value of Ki-67 as a tool for postoperative patient management considerations. The aim of the present study was to assess Ki-67 proliferation rates in different regions of pituitary adenomas and to statistically analyse these data for potential regional differences within each tumor.Ki-67 proliferation index was assessed in smear preparations of 100 specimens of 26 consecutive patients operated on for pituitary adenoma in the Department of Neurosurgery, Medical University Vienna. Depending on the size and extent of the tumor, a mean of 4 tissue samples (range 2–8) was selected intraoperatively from each adenoma from endosellar, suprasellar, parasellar, and basal sellar dural locations.Overall mean cell proliferation rate measured by Ki-67 was 1.81±0.90% (range 0.33–3.43%). Histologically invasive adenomas had significantly higher mean Ki-67 proliferation index in all samples from the same tumor than non-invasive adenomas (2.01±0.91% vs. 1.11±0.59%; P=0.024). Multiregional sampling revealed a homogenous distribution of Ki-67 index throughout an individual adenoma with no significant differences between any two different regions on t-test.Our data confirm that location of a biopsy does not influence Ki-67 index. Therefore, Ki-67 index of a single biopsy is representative for the whole individual adenoma. Thus Ki-67 index can be considered a reliable parameter for assessment of cell proliferation rate in adenoma biopsies and may be used for postoperative patient management considerations.     

Umbilical endometriosis

Tumors of the papillary region are an unusual and heterogeneous group of neoplasms that arise from the major papilla, the ampulla of Vater, and the peripapillary duodenum. Benign adenomas of the papilla of Vater are an increasingly recognized condition in those with familial adenomatous polyposis syndromes as well as sporadic cases. Papillary adenoma is a recognized but rare cause of acute pancreatitis. We describe a patient who presented with acute recurrent pancreatitis that was attributed to an intrapapillary pedunculated villous adenoma. Following diagnosis by endoscopic needle knife sphincterotomy and endoscopic retrograde cholangiopancreatography, endoscopic snare resection of the adenoma resulted in symptomatic improvement.     

Haemorrhagic pituitary tumours

In a group of 69 patients with pituitary tumours, 12 were found to have evidence of intratumoral haemorrhage on MRI, characterized by high signal intensity on short TR/TE sequences. This was verified in all but 1 patient. The majority of the bleedings occurred in macroadenomas. Five (42%) were prolactinomas and 4 (33%) were non-functioning adenomas. There were 2 GH- and 1 ACTH-secreting tumours. All 5 patients with prolactinomas were on bromocriptine medication. Two of the patients had a clinical picture of pituitary apoplexy. The haemorrhage was not large enough to prompt surgery in any of the patients. However, surgical verification of the diagnosis was obtained in 5 cases, while 6 patients were examined with follow-up MRI.