Retroperitoneal Schwannoma: Case Series and Literature Review

Cury, José; Coelho, Rafael F.; Srougi, Miguel

doi:10.1590/s1807-59322007000300024

Cited by 80 publications

(112 citation statements)

References 20 publications

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“…The diagnosis of malignant tumor lacks standardized diagnostic criteria but features dense fascicles in a "marble like" pattern consisting of asymmetrically tapered spindle cells. [10] In contrast to benign schwannomas, malignant ones having high recurrence rate and poor prognosis. MRI is the imaging modality of choice for most soft tissue lesion; however in our case MRI was misleading.…”

Section: Discussionmentioning

confidence: 99%

“…To the best of our knowledge, only 13 cases have been reported in the literature of diaphragmatic neurilemmomas (Table 1). [2][3][4][5][6][7][8][9][10][11][12][13][14][15] However present case is unique one, as this is the first case having such kind of dilemma in its initial presentation, where initially there was no clue regarding involvement of diaphragm but during surgical exploration and with final histopathological examination, whole scenario was changed. No other previous report had showed such kind of initial presentation.…”

Section: Discussionmentioning

confidence: 99%

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Benign diaphragmatic neurilemmoma mimicking a left adrenal cyst

Bhattar

Tomar

Dhakad

et al. 2018

Turkish Journal of Urology

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Neurilemmomas are benign, slow growing, encapsulated nerve sheath tumor. These tumors arise from the schwann cells of neural crest. Neurilemmomas can manifest in various form according to site, extent and severity of involvement of organ. Diaphragmatic neurilemmomas are very unusual and even difficult to diagnose on preoperative imaging. We will report a case of 39 year old male, who presented with complaints of occasional left flank pain for one year and subsequently investigated, which showed left adrenal cyst with haemorrhagic fluid content. On the contrary, when surgical exploration of the lesion was done, it showed a cyst within the diaphragm, completely separated from left kidney and left adrenal with haemorrhagic content in situ. Histopathological examination of the lesion showed it to be a benign neurilemmoma with cystic degeneration. Post opearatively patient did well. We believe that this is the first case report, which is addressing such kind of initial manifestation of diaphragmatic neurilemmomas.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Benign diaphragmatic neurilemmoma mimicking a left adrenal cyst

Bhattar

Tomar

Dhakad

et al. 2018

Turkish Journal of Urology

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“…A few well-known typical imaging characteristics for schwannomas which are target sign and fascicular sign are not frequently seen in retroperitoneal schwannomas. The "fascicular sign" is appearance of bundles which is a general property of neurogenic tumors and the "target sign" is the presence of hypointense centre and hyperintense periphery on T2 weighted MRI [8,9]. CT-guided core biopsy and fine needle aspiration have been founded to be unreliable for the diagnosis of retroperitoneal schwannoma.…”

Section: Discussionmentioning

confidence: 99%

Incidental Detection of Retroperitoneal Schwannoma: A Case Report

Rathod¹,

Dahiya²,

Kaman³

2017

J Clin Case Rep

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Schwannoma is a benign tumor arising from peripheral nerve sheath cells. It is rare to find them outside head, neck and extremities. We report a rare case of an incidentally detected large retroperitoneal mass in a 62-yearold male by radiological investigation, who underwent fine needle aspiration cytology which was insignificant and proceed for excision, which was found to be schwannoma on histopathological examination.

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“…In the retroperitoneal position, they occur most commonly between 40 and 60 years of age, with a male/female ratio of 2:3. Most schwannomas are benign, although malignant cases are rarely known to occur, especially when there is association with Von Recklinghausen's disease, which occurs in 5% to 18% of cases [6]. These tumours usually attain a large size of 10 -20cm in diameter by the time of surgery since they are usually asymptomatic or give rise to nonspecific symptoms such as vague abdominal or back pain or discomfort [3].…”

Section: Discussionmentioning

confidence: 99%

Benign Paravertebral Ancient Neurilemmoma in a Young Adult: A Rare Occurrence

Kulkarni

2015

JCDR

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A young adult male 21-year-old presented to our out patient department (OPD) with history of periumbilical pain of 6 months duration with no other associated symptoms. Examination revealed a vague, hard, globular, retroperitoneal mass, of 5x4 cm, in the left para-umbilical region extending into lumbar region, with lateral and superior borders palpable only on deep palpation. Ultrasonography of the abdomen showed an encapsulated well-circumscribed solid mass, measuring 6x4 cm, in the left para-aortic area, with homogenous density and two tiny areas of necrosis, suggestive of paragangliomaora lymph nodal mass. CECT abdomen reported a large,well-defined, lobulated soft tissue mass lesion measuring approximately 6.2x4.8x7.3 cm in the left para-aortic aspect of retroperitoneum at the level aortic bifurcation with extension along the left common iliac artery. It showed mild heterogeneous enhancement within the mass on contrast study with mild peripheral vascularity. The mass was closely abutting the abdominal aorta with infero-medial displacement of the left common iliac artery and lateral displacement of the mid portion of the left ureter. CT guided FNAC of the mass revealed spindle cell tumour of nerve sheath origin probably of benign nature. MRI Lumbo-Sacral spine [Table/ Fig-1,2] reported a large T1 hypo intense and T2 heterogeneously hyper intense, well-encapsulated retroperitoneal mass at the level of L4 vertebra representing nerve sheath tumour.Following these investigative findings, an exploratory laparotomy was performed with midline approach. A mass was noted in the left paracolic gutter covered by the sigmoid mesocolon. Peritoneal reflection from the lateral paracolic gutter along with sigmoid mesocolon was reflected medially off the mass, preserving the inferior mesenteric vessels. The mass measuring 7x 8 cm, was found stretching and displacing the left ureter and gonadal vessels on its lateral aspect [Table/ Fig-3a] and was closely abutting the lower 5cm of the aorta and displacing the left common iliac vessels inferiorly [Table /Fig-3b]. The above structures were densely adherent to the capsule of this mass. These structures were meticulously dissected and preserved. One lumbar spinal nerve was found entering the mass postero-superiorly, which was divided. The entire mass was excised with the capsule intact and sent for histopathological examination.Gross examination revealed a well-circumscribed tumour with solid and cystic areas and calcific foci. Histopathologic examination aBstRaCt Neurilemmoma is a benign neurogenic tumour arising from Schwann cells of the peripheral nerve sheath, which is commonly seen in women in the 5 th decade. It rarely arises in the retroperitoneum, being more common in the head and neck region and extremities. Ancient variety of schwannoma is a long-standing tumour, is seen in the middle age and elderly age groups, and is associated with secondary degenerative changes. Herein, we report a case of benign retroperitoneal paravertebral ancient neurilemmoma occurring in a young m...

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Retroperitoneal Schwannoma: Case Series and Literature Review

Cited by 80 publications

References 20 publications

Benign diaphragmatic neurilemmoma mimicking a left adrenal cyst

Benign diaphragmatic neurilemmoma mimicking a left adrenal cyst

Incidental Detection of Retroperitoneal Schwannoma: A Case Report

Benign Paravertebral Ancient Neurilemmoma in a Young Adult: A Rare Occurrence

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