Retroperitoneal solitary fibrous tumor of the pelvis with pollakiuria: a case report

Tsushimi, Takaaki; Yagi, Takaharu; Tomozawa, Naobumi; Ohnishi, Hiromi

doi:10.1186/1756-0500-5-593

Cited by 11 publications

(9 citation statements)

References 14 publications

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“…1,2 Although mostly occurring in the pleura, this tumour has also been recently reported in many sites, including abdomen, trunk, extremities and the head and neck region. [3][4][5][6][7][8] In our study, eight SFT in the head and neck region were located in the orbit, masticator space, the parapharyngeal space and the parotid gland.…”

Section: Discussionmentioning

confidence: 99%

“…3,4 Although rare, SFT could also be found in various head and neck regions, such as the cheek, orbit, oral cavity, laryngeal and parapharyngeal spaces as well as the thyroid gland, [4][5][6][7] and the common sites affected in the head and neck region are the orbit and oral cavity. 7,8 Classically, SFT are composed of variably pleomorphic spindle cells admixed with collagen and arranged haphazardly.…”

Section: Introductionmentioning

confidence: 99%

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MRI findings of solitary fibrous tumours in the head and neck region

Liu¹,

Tao²,

Shi³

et al. 2014

Dentomaxillofacial Radiology

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Objectives: To analyse the MRI findings of solitary fibrous tumours in the head and neck region. Methods: We retrospectively reviewed MR images in eight patients with solitary fibrous tumours proven on histological examination. All the patients underwent conventional MRI, and four patients also underwent dynamic contrast-enhanced MRI and diffusion-weighted imaging in five cases. Image characteristics were analysed. Results: All lesions were found as solitary well-defined masses ranging in size from 1.9 to 6.8 cm (mean, 4.1 cm). They were mostly homogeneous and isointense to the muscle on T 1 weighted images and heterogeneous and mildly hyperintense on T 2 weighted images. After gadolinium administration, areas that were mildly hyperintense on T 2 weighted images were strongly enhanced. They were mildly hyperintense on diffusion-weighted imaging. The average tumour-apparent diffusion coefficient values were 0.001 157 ± 0.000 304 9 mm s 22 compared with the muscle 0.000 760 ± 0.000 265 0 mm s 22 , and there was a statistical difference of p 5 0.002. The time-intensity curves exhibited a rapidly enhancing and a slow washout pattern on dynamic contrast-enhanced MRI. Conclusions: Solitary fibrous tumours should be considered in cases of heterogeneous hypervascular tumours in the head and neck region. Areas of mild hyperintense intensity on T 2 weighted images that are strongly enhanced after gadolinium injection are suggestive of this diagnosis. Non-restricted diffusion and rapidly enhancing and slow washout pattern time-intensity curves may be additional valuable features.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

MRI findings of solitary fibrous tumours in the head and neck region

Liu¹,

Tao²,

Shi³

et al. 2014

Dentomaxillofacial Radiology

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“…Pathological characteristics of malignant SFT include hypercellular lesions, cytological atypia, numerous mitoses (four or more mitoses per 10 high-power fields), tumor necrosis, and/or infiltrating margins [8]. Vallat-Decouvelaere et al reported malignancy in eight of 92 cases of extrathoracic SFT, including local recurrence or distal metastasis, in seven of which at least one of the typical pathological characteristics was observed in the primary tumor [9]. Various benign or malignant soft tissue tumors emerging from fat, muscle, and nerve may develop in the retroperitoneal region.…”

Section: Discussionmentioning

confidence: 99%

Solitary Fibrous Tumor: An Uncommon Cause of Paraparesis and Sciatic Pain

Vilaça¹,

Monteiro²,

Pimentel³

2017

J Med Cases

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Solitary fibrous tumor (SFT) is a rare type of soft tissue neoplasia, usually seen in adults. They are mesenchymal neoplasias that appear to exhibit fibroblastic differentiation, classically described in the pleura, but can arise anywhere. They have a generally benign course; however, in rare cases, they may recur locally or at a distance. When surgery is not possible or in the presence of metastasis, chemotherapy or palliative radiotherapy may be therapeutic options. The patient was a 44-year-old man, a construction worker, healthy apart from a totally resected left pelvic SFT 3 years before. He was observed over the last several times in the emergency department (ED) by right sciatic pain and discharged. He had no history of trauma. A lumbar MRI was performed without alterations of relief. The worsening of the symptomatology, with commitment of the autonomous march, resorted him again to ED. Clinical features showed grade 2 strength with hypoesthesia and an aquiline reflex abolished in the right lower limb (MI) and strength grade 4+ at the distal level of the left MI. There was a palpable rounded swelling on the posterior aspect of the right thigh (5 × 8 cm), with an elastic and non-painful consistency at palpation. MRI of the neuro-axis showed no changes of relief. Pelvic CT showed swelling with soft tissue component, which invaded the iliac bilaterally and right sacroiliac joint, with lithic alteration. The histology of the pelvic lesion and thigh lesion revealed an SFT. Radiotherapy and then chemotherapy were performed. The patient died 1 year after the diagnosis. We report a fatal case of recurrence of SFT. The authors highlight the case because of its rarity and its "malignant" evolution. Long-term follow-up of these patients is required because of the risk of recurrence of these tumors and their uncertain biological behavior.

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“…Solitary fibrous tumors (SFTs) are rare, non-functional, and generally benign mesenchymal tumors, with an estimated age-standardized incidence of 1.4 per million population ( 1 , 2 ). Despite the fact that SFTs are mainly intrathoracic ( 1 ), on rare occasions they can appear in extrapleural sites, such as the retroperitoneal ( 3 ) and pelvic regions ( 4 ). In total, 10–20% of SFTs are classified as malignant, and eventually lead to mortality ( 1 ).…”

Section: Introductionmentioning

confidence: 99%

Late recurrence of a malignant hypoglycemia-inducing pelvic solitary fibrous tumor secreting high-molecular-weight insulin-like growth factor-II: A case report with protein analysis

et al. 2016

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The present study reports a case of recurrent malignant pelvic solitary fibrous tumor (SFT) that induced non-islet cell tumor hypoglycemia via high-molecular-weight insulin-like growth factor-II in a 72-year-old male patient. The tumor recurred ~12 years after the complete resection of the original mass. The recurrent tumor, which had directly invaded the left ureter and perirectal fat tissue, could not be completely excised due to its fragility and adhesiveness. At 13 days post-surgery, the patient presented with rectal perforation, and an urgent rectal resection and colostomy was performed. Neither recurrence of the tumor nor hypoglycemic symptoms were observed 9 months after the surgery. High molecular weight insulin-like growth factor-II was detected in the serum and tumor specimens by western blot analysis and immunohistochemistry. The present case report suggests that certain SFTs can relapse even ≥10 years after a presumed complete resection of the primary tumor, and that performing a safe and complete resection of these tumors can be challenging, due to their adhesiveness or physical presentation; therefore, the indications for surgery should be considered with caution.

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Retroperitoneal solitary fibrous tumor of the pelvis with pollakiuria: a case report

Cited by 11 publications

References 14 publications

MRI findings of solitary fibrous tumours in the head and neck region

MRI findings of solitary fibrous tumours in the head and neck region

Solitary Fibrous Tumor: An Uncommon Cause of Paraparesis and Sciatic Pain

Late recurrence of a malignant hypoglycemia-inducing pelvic solitary fibrous tumor secreting high-molecular-weight insulin-like growth factor-II: A case report with protein analysis

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