Metanephric Adenoma Treated with Laparoscopic Nephrectomy

Ebine, Takashi; Ohara, Rena; Momma, Tetsuo; Saito, Shiro; Kuramochi, Shigeru

doi:10.1111/j.1442-2042.2003.00771.x

Cited by 9 publications

(8 citation statements)

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“…CT scan showed that the tumor was slight and gradually enhanced in each period, with a lower enhancement degree than that of the adjacent normal kidney tissue. It is debatable whether to use needle biopsy for preoperative diagnosis (Ebine et al 2004 ). We did not perform preoperative biopsy because of the following two reasons: 1) additional risk of tumor spread and bleeding; and 2) the surgical approach or planning was the same for either renal cell carcinoma or MA.…”

Section: Discussionmentioning

confidence: 99%

Retroperitoneal laparoscopic partial nephrectomy for treatment of metanephric adenoma (Report of 6 cases)

Guo

Zhou

et al. 2016

SpringerPlus

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Objectives: To investigate the clinical and pathological features of metanephric adenoma (MA) and the clinical outcome after retroperitoneal laparoscopic nephron-sparing surgery.Methods: Six out of 183 partial nephrectomies performed during January 2009 to August 2014 were confirmed to be MA confirmed by postoperative pathological study. Perioperative parameters of the six patients were then retrospectively collected, analyzed and compared with current literature, including warm ischemia time (WIT), total operation time, estimated blood loss (EBL), positive surgical margin (PSM), and complications. Surgical and oncological outcome of all six patients were evaluated based on a mean follow up of 17 months (5-48 months).Results: Tumors in all six cases were all successfully removed by partial nephrectomy. Mean WIT was 24.7 min (19-35 min). Mean operation time was 103.6 min (82-147 min). Mean EBL was 53.5 ml (20-85 ml). No conversion, transfusion or other major complication were observed in all six cases. Postoperative pathology confirmed negative surgical margin in all six cases. During a mean of 17 month follow up (5-48 months), no local recurrence or metastasis were found in all six cases.Conclusion: MA is a rare benign primary kidney epithelial cancer, which could hardly be differentiated from renal malignancies based on preoperative imaging. Our data suggested that retroperitoneal laparoscopic partial nephrectomy can be used for surgical treatment of MA, in terms of tumor control and preservation of renal function.

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Section: Discussionmentioning

confidence: 99%

Retroperitoneal laparoscopic partial nephrectomy for treatment of metanephric adenoma (Report of 6 cases)

Guo

Zhou

et al. 2016

SpringerPlus

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“…Most of our patients underwent nephrectomy mainly because of the difficult preoperative differentiation of their lesions from malignant renal tumours. Because imaging is unable to exclude renal cell carcinoma, centrally located or anatomically complex masses should be treated by radical nephrectomy [ 23 ].…”

Section: Discussionmentioning

confidence: 99%

Adult metanephric adenoma presumed to be all benign? A clinical perspective

Tang

Zhang

et al. 2015

BMC Cancer

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BackgroundIn most documented literature, metanephric adenoma (MA) is described as a benign tumour. Nevertheless, the nature of MA remains unclear and the clinical criteria of different MA subtypes are not well established. In the present study, we investigated the clinicopathological characteristics of MA, especially those of the uncommon histological subtypes.MethodsA cohort study was performed on 18 patients with pathologically proven MA in our institute from January 2004 to June 2014. The patients’ clinicopathological and radiological data were retrospectively analysed and evaluated with an emphasis on the corresponding subtypes.ResultsThe patient population had a female: male ratio of 1:1 and mean age of 50 years (range, 18–66 years). The mean tumour size was 3.9 cm (range, 1.4–9.0 cm). There were no pathognomonic radiological features that posed a challenge for a preoperative diagnosis of MA. Fourteen patients underwent radical nephrectomy, and the other four underwent partial nephrectomy. Three histological subtypes were observed: classic MA (n = 10), malignant MA (n = 2), and composite MA with coexistence of different malignant components (n = 6). Despite the presence of atypical histological features and malignant components among the patients, only one patient developed distant metastasis (median postoperative follow-up, 56 months; range, 30–86 months).ConclusionsMAs are a heterogeneous group of neoplasms with different biological characteristics. The correct identification of this entity and its subtypes would facilitate stratification of optimal management protocols and accurate assessment of the prognosis.

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“…Our two patients were also treated with partial nephrectomy, procedure with better renal function preservation, without compromising the patient’s survival. Further advance in reducing patient morbidity may be achieved by laparoscopic nephrectomy as reported by Ebine et al11 in 2004 for MA treatment in a 31 years old female patient with a left renal mass of 4.5 cm detected incidentally during an abdominal ultrasound examination. Three years latter, Kumar et al12 reported a laparoscopic partial nephrectomy as treatment for MA in a 47‐year‐old patient.…”

Section: Discussionmentioning

confidence: 99%