Retroperitoneal Solitary Fibrous Tumor: A “Patternless” Tumor

Myoteri, Despoina; Dellaportas, Dionysios; Nastos, Constantinos; Gioti, I; Gkiokas, Georgios; Carvounis, Eleni; Theodosopoulos, Theodosios C.

doi:10.1155/2017/4634235

Cited by 4 publications

(9 citation statements)

References 16 publications

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“…[8] In the literature, there is no specific laboratory test available for the diagnosis of SFT-HMP. Myoteri et al [4] suggested using glucose levels due to the fact that 10% of the patients have hypoglycemia due to increased production of Insulin like Growth Factor 2. Differentiation between SFT-HMP and other solid tumors is also not possible using radiological studies.…”

Section: Discussionmentioning

confidence: 99%

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Solitary fibrous tumor/hemangiopericytoma of the penis

Çubuk¹,

Yanaral²,

Üçpınar³

et al. 2019

Turkish Journal of Urology

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Solitary fibrous tumor/hemangiopericytoma (SFT-HMP) is a rare spindle-cell mesenchymal tumor, thought to be of myofibroblastic origin. Penile SFT-HMP was mentioned in the literature in two separate case reports which were published in 2015 and 2017. We present the first case of SFT-HMP which is localized on corpus cavernosum of the penis. A 55-year-old man presented to our clinic with a small and gradually growing lesion on his penis for the past year, which recently caused difficulties during sexual intercourse. On physical examination; a well-shaped, nodular non-fluctuant, solid, painless mass, measuring 4x4 cm was palpated. Magnetic resonance imaging showed 5x5 cm mass located on the right corpus cavernosa. Under spinal anesthesia, surgical excision was performed. Pathologically, the tumor had an irregular architecture patterns and was characterized by hypercellular areas separated by thin-walled, branching vessels, lined with a single layer of flattened endothelial cells. SFT-HMP rarely occurs in genital tract and penile presentation is among the rarest. It should be classified and considered under penile masses, especially if the mass is well circumscribed, painless and slowly growing in nature. After differential diagnosis, surgical excision is mandatory.

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Section: Discussionmentioning

confidence: 99%

“…Deep muscles of proximal extremity, head, neck and retroperitoneum are common locations for extrapleural SFT. [4] Penile SFT-HMP was mentioned in the literature in two separate case reports which were published in 2015 and 2017. [5,6] We present the first case of SFT-HMP which was localized on corpus cavernosum of the penis.…”

Section: Introductionmentioning

confidence: 99%

Solitary fibrous tumor/hemangiopericytoma of the penis

Çubuk¹,

Yanaral²,

Üçpınar³

et al. 2019

Turkish Journal of Urology

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“…The differential diagnosis of primary retroperitoneal masses is given in Table 1 7 . As the case described above, SFTs in the retroperitoneum are rarely found and less than 100 cases have been described so far 2 . The main feature of SFTs is the large size they can reach as they do not have any specific symptoms.…”

Section: Discussionmentioning

confidence: 99%

“…Since then, it has been reported in many extrapleural sites but is found to be exceedingly rare. Most of them are reported to arise from the pleura, and only 30% are of extrapleural origins 2 . Less than a hundred cases of primary retroperitoneal solitary fibrous tumors have been described till now.…”

Section: Introductionmentioning

confidence: 99%

Primary retroperitoneal solitary fibrous tumor: A case report

Shrestha,

Adhikari,

Maharjan

et al. 2023

Clinical Case Reports

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Key Clinical MessagePrimary retroperitoneal masses have numerous differential diagnoses, many of which are rare entities. These can be neoplastic or nonneoplastic. Among the rare conditions are solitary fibrous tumors, which can either be benign or malignant. It is a mesenchymal, spindle‐cell tumor, reported first in 1931 as a pleural tumor by Klemperer et al. A 20‐year‐old lady, with abdominal pain for 6 months, was diagnosed with a retroperitoneal mass on the left lower abdomen on USG which was confirmed by an MRI scan of the abdomen. The patient underwent laparoscopy‐assisted excision of the mass. The final histopathological reports and immunohistochemistry reports revealed a solitary fibrous tumor. Solitary fibrous tumors (SFTs) are rare tumors in the retroperitoneum. In our search, fewer than a hundred cases have been reported. It has a characteristic “patternless pattern” in a microscopic study. Adverse outcomes of SFTs are associated with atypical features in histology, such as nuclear pleomorphism, necrosis, increased cellularity, and mitoses >4/10 HPF and size more than 10 cm. The standard of care is surgical excision with clear margins. Open surgeries have been done traditionally; we present a case where we performed the excision laparoscopically.

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“…Leiomyoma may show similar morphology, but its vessels are usually capillaries, along with a few arterioles and small arteries, in contrast to the thick-walled vessels of the ALM. Solitary fibrous tumor can occur at unusual sites 13-18 and rarely may present as a retroperitoneal/pelvic mass 19 20 . Unlike ALM, it shows a hemangiopericytomatous vasculature, with a typical branching configuration and perivascular hyalinization.…”

Section: Discussionmentioning

confidence: 99%

Angioleiomyoma of the lumbo-sacral region with unusual keloid-like collagen fibers

2020

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Summary Angioleiomyoma is a benign soft tissue tumor which usually occurs in superficial or deep soft tissues. Only rarely does this tumor occur at unusual sites, including retroperitoneum. We present a rare case of lumbo-sacral angioleiomyoma in a 54-year-old man. Apart from this unusual site, the most striking morphological feature was the presence of numerous keloid-like collagen fibers interspersed among the fascicles of the neoplastic cells. Radiological, morphological and immunohistochemical features are presented, and differential diagnosis with its potential morphological mimickers is discussed.

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Retroperitoneal Solitary Fibrous Tumor: A “Patternless” Tumor

Cited by 4 publications

References 16 publications

Solitary fibrous tumor/hemangiopericytoma of the penis

Solitary fibrous tumor/hemangiopericytoma of the penis

Primary retroperitoneal solitary fibrous tumor: A case report

Angioleiomyoma of the lumbo-sacral region with unusual keloid-like collagen fibers

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