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Retroperitoneal Tumors (retroperitoneal + tumor)

Distribution by Scientific Domains

Medical Sciences	100%

Selected Abstracts

Malignant retroperitoneal tumor arising in a multicystic dysplastic kidney of a girl with Schinzel,Giedion syndrome

INTERNATIONAL JOURNAL OF UROLOGY, Issue 12 2005
FUMI MATSUMOTO
Abstract, We report the first case of malignant retroperitoneal tumor arising in a multicystic dysplastic kidney of an 8-year-old girl with Schinzel-Giedion syndrome. Although conservative treatment has been regarded as the standard management for asymptomatic multicystic dysplastic kidney, prophylactic surgical removal should be considered for selected children with potential risk of malignancy. [source]

Clinicopathological review of 46 primary retroperitoneal tumors

INTERNATIONAL JOURNAL OF UROLOGY, Issue 9 2007
Mitsuhiro Tambo
Objectives: To clarify the clinical factors including diagnostic imaging findings that may correlate with the histopathological malignancy in primary retroperitoneal tumors. Methods: The clinical backgrounds and imaging findings of 22 benign and 24 malignant primary retroperitoneal tumors were retrospectively investigated, and the prognosis of patients with malignant retroperitoneal tumors was assessed. Results: There were significant correlations between the presence of symptoms and malignancy (P < 0.01), as well as between the irregularity of tumor margins and malignancy (P < 0.01). On dynamic magnetic resonance imaging (MRI), 90% of malignant tumors showed early enhancement either with quick or slow washout, while 75% of benign tumors showed delayed and no enhancement (P < 0.002). All malignant and benign paraganglioma showed the same early enhancement with quick washout. Malignant lymphoma showed various enhancement patterns. The 2-year and 5-year cause-specific survival rates of the patients with malignant retroperitoneal tumors were 68.0% and 43.2%, respectively. All malignant lymphoma patients were mainly treated with chemotherapy after being diagnosed histologically. Malignant paraganglioma patients who could not meet complete resection needed chemotherapy for promising survival. Conclusion: The symptoms, the irregularity of the margins, and the specific enhancement pattern on the dynamic MRI may be important predictive factors of the primary malignant retroperitoneal tumors. Histological diagnosis was needed for malignant definition of paraganglioma because both benign and malignant paraganglioma showed similar clinical and imaging findings. Preoperative biopsy should be considered for selection of the appropriate treatment particularly in patients that are likely to have malignant lymphoma that could not be diagnosed definitively by the clinical and imaging findings. [source]

Application of cardiopulmonary bypass for resection of renal cell carcinoma and adrenocortical carcinoma extending into the right atrium

INTERNATIONAL JOURNAL OF UROLOGY, Issue 3 2006
TATSUMASA OCHI
Aim:, The application of cardiopulmonary bypass to atrial involvement represents an important advance that has improved the safety and technical efficacy of a difficult surgical undertaking. Our experiences of the management of extended thrombi into the right atrium in patients with retroperitoneal malignancy using a cardiopulmonary bypass were discussed. Methods:, Data were reviewed for five patients (two men and three women; mean age, 60.4 years; range, 49,79 years) with retroperitoneal tumors displaying intracardiac tumor extension. Tumors originated in the right kidney in four patients, and in left adrenal gland in one patient. Cardiopulmonary bypass was used in all cases. Results:, Mean total blood loss was 6059 mL. Mean operative time was 14.7 h. No intra- or postoperative complications due to surgical technique were encountered, and no significant bleeding occurred during incision of the inferior vena cava or after removal of tumor thrombus. The follow-up period ranged from 3 to 20 months with a mean of 12.6 months. Of the five patients, three died of metastatic diseases, one died of liver dysfunction and one remains disease free as of 18 months postoperatively. Conclusions:, Our experience indicates that this procedure can be safely used for atrial involvement. Although superior long-term survival cannot be shown yet, favorable early results and a lack of perioperative complications were identified. [source]

Cluster analysis of immunohistochemical markers in leiomyosarcoma delineates specific anatomic and gender subgroups

CANCER, Issue 18 2009
Jason C. Carvalho MD
Abstract BACKGROUND: Leiomyosarcoma (LMS) can be categorized into uterine, retroperitoneal, nonretroperitoneal soft tissue, cutaneous, visceral, and osseous anatomic subtypes. The differential expression of smooth muscle markers, estrogen receptor (ER), progesterone receptor (PR), and Wilms tumor-1 protein (WT1) by anatomic subtype and gender was explored. METHODS: A total of 78 LMS comprised of 30 uterine and 48 nonuterine tumors were studied. Nonuterine tumors were comprised of 17 soft tissue, 16 retroperitoneal, 7 cutaneous, 5 visceral, and 3 osseous subtypes. Immunohistochemical staining intensity on tissue microarray slides was scored as 0, 1+, or 2+, and cluster analysis was performed on the data. RESULTS: Smooth muscle actin was the most sensitive antibody (95%), followed by muscle-specific actin (91%), calponin (88%), desmin (73%), caldesmon (66%), and myosin (64%). Caldesmon and myosin were usually coexpressed, and were highest in retroperitoneal tumors (94%). There was no discernable correlation noted between histologic differentiation and smooth muscle marker expression. ER was much more common in women, with the highest frequencies noted in female retroperitoneal (86%) and uterine (63%) tumors. Nuclear WT1 was expressed in 11% of all tumors, and was limited to ER-positive uterine and female retroperitoneal tumors. Cluster analysis segregated 4 groups, most notably 1 driven by ER and PR, with the vast majority being uterine and female retroperitoneal tumors. CONCLUSIONS: Smooth muscle markers demonstrated variable sensitivities in LMS, with a tendency for anatomic subtypes to segregate based on expression patterns of these markers. ER defined a subgroup of uterine and female retroperitoneal tumors, and WT1 was limited to such tumors, suggesting a common line of differentiation as well as potential therapeutic targets. Cancer 2009. © 2009 American Cancer Society. [source]

Does retroperitoneal lymph node dissection have a curative role for patients with sex cord,stromal testicular tumors?

CANCER, Issue 4 2003
Ashraf A. Mosharafa M.D.
Abstract BACKGROUND Sex cord,stromal tumors account for < 5% of all adult testicular tumors, and 10% are malignant. Due to the limited reported experience, there is no agreement on the best management, especially in patients who have tumors with malignant pathologic features or who present with metastatic disease. The authors attempt to evaluate the role of retroperitoneal lymph node dissection (RPLND) in the management of patients with these malignant sex cord,stromal tumors. METHODS Reviewing the Indiana University testis cancer registry revealed 17 patients who underwent RPLND for sex cord,stromal tumors. Pathology was reviewed for features suggestive of malignancy. The data examined included clinical and pathologic stage, surgical procedure, additional therapy received, and outcome. RESULTS Pathology included Leydig tumors in six patients, Sertoli tumors in four patients, sex cord,stromal tumors in five patients, a granulosa cell tumor in one patient, and a poorly differentiated non,germ cell tumor in one patient. Nine patients had histologic features suggestive of malignancy. Clinical stage at surgery was Stage I in nine patients and Stage IIA,IIIA in eight patients. Patients underwent modified or bilateral RPLND. Nine patients had pathologic Stage I tumors, and the remaining eight patients and had pathologic Stage IIB,IIIA tumors. Follow-up ranged from 8 months to 11 years. Of the eight patients with Stage II,III disease, six patients eventually died of metastatic disease despite additional radiotherapy and/or chemotherapy. CONCLUSIONS Sex cord,stromal tumors have a potentially aggressive malignant behavior that is difficult to predict based on clinical and pathologic features. Although the therapeutic role of RPLND in patients with small-volume metastatic retroperitoneal tumors is unclear, RPLND remains an option to be performed immediately after orchiectomy, especially in patients who have tumors with malignant features and/or small-volume metastatic disease. Cancer 2003;98:753,7. © 2003 American Cancer Society. [source]