Laparoscopic excision of a retroperitoneal schwannoma: A case report

Ohsawa, Manato; Miguchi, Masashi; Yoshimitsu, Masanori; Oishi, Koichi; Kohashi, Toshihiko; Hihara, Jun; Mukaida, Hidenori; Kaneko, Mayumi; Egi, Hiroyuki; Ohdan, Hideki; Hirabayashi, Naoki

doi:10.1111/ases.12607

Cited by 12 publications

(10 citation statements)

References 9 publications

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“…All patients with a small amount of residual tumors should be closely followed up, and during the follow-up process of our hospital, no obvious malignant changes have been found, consistent with related reports [18,19] . In recent years, some schwannomas can also be removed by laparoscopy or robotic laparoscopy [20] , the tumor volume of laparoscopic surgery in this group was less than 5cm.…”

Section: Accepted Manuscriptmentioning

confidence: 81%

Analysis of Benign Retroperitoneal Schwannomas: A Single-center Experience

Tang

Liu

Chen

et al. 2022

J Neurol Surg A Cent Eur Neurosurg

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Background： Retroperitoneal schwannomas are rare. The purpose of this study was to present our experience with the diagnosis and treatment of 67 such tumors. Methods： Retrospective analysis of 67 patients with retroperitoneal schwannoma admitted to Peking University International Hospital from 2015 to 2021. Results： 67 patients presented with retroperitoneal schwannomas, 37 cases had no obvious clinical symptoms. 62 cases were completely excised, 5 cases were subtotal resection, 7 cases were combined with organ resection. The intraoperative blood loss was 300ml (20-9000ml), the tumor maximum size was 9cm (2.5-26cm), post-complication occurred in 6 cases (9.0%). Compared with abdominal retroperitoneal tumors, pelvic retroperitoneal tumors had larger tumor volume, more bleeding, higher proportion of block resection, and longer postoperative hospitalization time (P<0.05). The residual mass progressed slowly in 5 patients with subtotal resection, and no obvious malignant transformation occurred. Conclusion：Complete resection of schwannoma can achieve a good long-term prognosis. Patients with residual tumor after surgery progress slowly and rarely become malignant. We recommend early resection after the discovery of a pelvic retroperitoneal schwannoma. Keywords： Schwannoma; Retroperitoneal neoplasms; Postoperative complications

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Section: Accepted Manuscriptmentioning

confidence: 81%

Analysis of Benign Retroperitoneal Schwannomas: A Single-center Experience

Tang

Liu

Chen

et al. 2022

J Neurol Surg A Cent Eur Neurosurg

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“…On the other hand, a posterior approach usually makes the dissection of high lesions more difficult due to the lack of good exposure, which increases the risk of iatrogenic injuries. There are also cases of laparoscopic resection of pelvic schwannomas described in the literature [ 9 , 10 ]. Schwannomas are usually benign and they rarely undergo malignant transformation [ 1 ], so the prognosis is favorable after R0 resection.…”

Section: Discussionmentioning

confidence: 99%

A 68-Year-Old Woman Presenting with Recurrent Abdominal Pain and a Diagnosis of a Presacral Retroperitoneal Benign Schwannoma that Mimicked an Ovarian Tumor on Pelvic Magnetic Resonance Imagining

et al. 2022

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Patient: Female, 68-year-old Final Diagnosis: Presacral retroperitoneal benign schwannoma Symptoms: Recurrent abdominal pain Medication:— Clinical Procedure: Excision of the mass • laparotomy Specialty: Surgery Objective: Rare disease Background: Schwannomas are benign tumors and their appearance in the pelvic region is rare and poses a major diagnostic problem. They can be sporadic or associated with genetical syndromes. They have a slow growth rate and may be asymptomatic for many years. Symptoms are usually nonspecific and due to compression of adjacent structures. Abdominal imaging modalities may not be able to differentiate a benign schwannoma from a malignant retroperitoneal tumor. This report is of a case of a 68-year-old woman presenting with recurrent abdominal pain and a diagnosis of a presacral retroperitoneal benign schwannoma that mimicked an ovarian tumor on pelvic magnetic resonance imaging. Case Report: The patient had a history of a femoral hernia repair and recurrent lower abdominal pain. Pelvic imaging raised the suspicion of a primary ovarian tumor. The mass appeared to have clear cleavage planes with the surrounding structures, so the patient was proposed for an exploratory laparotomy. Prior to the surgery, an additional pelvic computed tomography (CT) was performed (10 months after the first one), which did not show progression of the disease. The histological examination result was compatible with a benign retroperitoneal schwannoma and not an ovarian tumor. Conclusions: This report highlights that the diagnosis of retroperitoneal and pelvic masses can be challenging. In women, a primary ovarian tumor should be excluded on imaging and the diagnosis of a benign tumor, such as schwannoma, must be confirmed by histopathology, either preoperatively or following tumor resection.

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“…There are also reports of laparoscopic or robot-assisted resection of retroperitoneal schwannomas. 2,[26][27][28][29][30] However, nine cases of schwannomas near the great vessels have been reported; 2 therefore, laparoscopic surgery cannot be considered absolutely safe. In our opinion, we believe that retroperitoneal schwannomas are unsuitable for laparoscopic surgery when the tumors are large and closely related to the surrounding large vessels or organs.…”

Section: Discussionmentioning

confidence: 99%

Two giant connected retroperitoneal schwannomas: a rare case report

et al. 2022

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Schwannoma is a type of tumor originating from Schwann cells of peripheral nerves. In this study, we report a rare case of two giant connected retroperitoneal schwannomas. The patient presented to our department with a 1-day history of abdominal pain and without other symptoms. There were no abnormalities in the patient’s tumor markers. Abdominal plain computed tomography (CT) revealed two (combined) retroperitoneal masses appearing as soft tissue-density shadows with uneven internal density, cystic low-density shadows, and patchy calcification shadows. The larger mass measured approximately 12.0 cm × 12.3 cm in size. The tumors were completely excised by a reasonable surgical approach while the surrounding organs closely related to the tumor were preserved. Postoperative pathology confirmed that the tumors were benign schwannomas. In the 18-month follow-up, the patient had no recurrences and was asymptomatic. We summarize the diagnosis and treatment of two rare combined giant retroperitoneal schwannomas in a single patient. Laparotomy for the management of retroperitoneal giant schwannomas may be safe and effective.

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Laparoscopic excision of a retroperitoneal schwannoma: A case report

Cited by 12 publications

References 9 publications

Analysis of Benign Retroperitoneal Schwannomas: A Single-center Experience

Analysis of Benign Retroperitoneal Schwannomas: A Single-center Experience

A 68-Year-Old Woman Presenting with Recurrent Abdominal Pain and a Diagnosis of a Presacral Retroperitoneal Benign Schwannoma that Mimicked an Ovarian Tumor on Pelvic Magnetic Resonance Imagining

Two giant connected retroperitoneal schwannomas: a rare case report

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