MR imaging of pelvic extraperitoneal masses: A diagnostic approach

Janvier, A; Rousset, Pascal; Cazejust, J.; Bouché, Olivier; Soyer, Philippe; Hoeffel, Christine

doi:10.1016/j.diii.2015.07.009

Cited by 13 publications

(7 citation statements)

References 17 publications

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“…In addition to identifying the anterior peritoneal reflection, it is also useful to look at the displacement of the normal pelvic structures (4). Diagnostic clues that indicate that the mass originates from the extraperitoneum are as follows (Fig 4): (a) anterior or central displacement of extraperitoneal organs (eg, uterus or rectum), (b) anterior or central displacement of the iliac vessels or iliopsoas muscles or encasement of the iliac vessels, and (c) mass effect on or effacement of pelvic sidewall muscles.…”

Section: Tumors or Tumor Mimics Arising From Intraperitoneal Organsmentioning

confidence: 99%

MRI of Tumors and Tumor Mimics in the Female Pelvis: Anatomic Pelvic Space–based Approach

Nougaret¹,

Nikolovski²,

Paroder³

et al. 2019

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Section: Tumors or Tumor Mimics Arising From Intraperitoneal Organsmentioning

confidence: 99%

MRI of Tumors and Tumor Mimics in the Female Pelvis: Anatomic Pelvic Space–based Approach

Nougaret¹,

Nikolovski²,

Paroder³

et al. 2019

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“…Epidermoid cysts commonly appear as unilocular masses containing homogenous and hypoattenuating fluid material with a distinct thin wall. 1 Liposarcoma is a mesenchymal tumor with a wide spectrum of radiographic appearance based on type: well-differentiated, dedifferentiated, myxoid, pleomorphic, and mixed-type. 25 As this diagnosis is more common within the age group of our patient, this was also considered as part of our differential.…”

Section: Discussionmentioning

confidence: 99%

“…Our differential included dermoid or epidermoid cysts given predominance of hypoattenuating fat as well as liposarcoma or sacrococcygeal teratoma given variable appearance with mixed solid and cystic components albeit without visible invasion. 1 Routine biochemical testing was all within normal limits.…”

Section: Case Presentationmentioning

confidence: 93%

“…These masses comprise different types of tissues such as fat, hair, muscle, bone, etc. 1 Extragonadal teratomas are uncommon and as the name declares, arises from anatomical locations other than the gonads. Common locations for extragonadal teratomas are within midline structures such as the intracranial pineal gland, anterior mediastinum, retroperitoneum, and sacrococcygeal regions.…”

Section: Introductionmentioning

confidence: 99%

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Extragonadal Perirectal Mature Cystic Teratoma in the Adult Male

Mahankali¹,

Trimble²,

Panciera³

et al. 2022

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Background: Extragonadal abdominopelvic teratomas in adults are extremely rare, and those in males are exceedingly rare. These masses are most commonly found incidentally and require surgical excision for diagnostic confirmation after a thorough workup. Case Presentation: This is a case report of a 49-year-old male who presented to a urology office with symptoms of hematuria, incidentally, found to have a pelvic mass on computed tomography urogram prompting colorectal surgical evaluation and subsequent laparoscopic complete excision. The clinical presentation, radiographic findings, and histopathological findings are described along with a literature review of extragonadal abdominopelvic mature cystic teratoma, also referred to as a sacrococcygeal teratoma. Discussion: A broad differential diagnosis was generated for this patient with a pelvic mass after complete work-up, consisting of a dermoid or epidermoid cyst, liposarcoma, or sacrococcygeal teratoma. Radiological features can aid in the diagnostic confusion that may present in the adult patient. Conclusion: Albeit rare in the male and adult population, sacrococcygeal teratoma is a plausible differential diagnosis for a pelvic mass. Underrepresented in the literature in regard to guidelines on management, complete surgical excision is the gold standard, with laparoscopy being a reasonable approach.

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“…It is complicated to conduct anatomy of the pelvis. Similar to that of the abdomen, the pelvis has two main compartments: the peritoneal cavity and the sub-peritoneal space, which are separated by the peritoneum, and each compartment is a continuous space [1,2]. e sub-peritoneal cavity contains the entire abdominal and pelvic organs (and the respective mesenteric organs), extraperitoneal space ligaments, blood vessels, nerves, and lymphatic vessels.…”

Section: Introductionmentioning

confidence: 99%

Region-Growing Algorithm on CT Angiography Images for Detection of Gynecological Malignant Tumor

Wen¹,

Su²,

Lin³

2021

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This paper aimed to explore pelvic lymphadenectomy for gynecological malignant tumors guided by computed tomography angiography (CTA) images under region-growing algorithm (RGA). 100 cases of malignant tumor patients who received pelvic lymphadenectomy in hospital from January 2018 to January 2020 were analyzed. Patients were classified into control group (CTA image) and experimental group (RGA-based CTA image), each with 50 cases. The overall accuracy (OA) of the pelvic CT image segmentation parameters under RGA, the watershed segmentation algorithm (WA), and the swarm intelligence optimization algorithm (SIOA) was compared. Comparisons of segmentation parameters, denoising performance, and CT imaging of patients as well as diagnosis rate and total efficiency rate were carried out. The results showed that overall accuracy (OA) of RGA was considerably higher versus watershed segmentation algorithm (WA) and swarm intelligence optimization algorithm (SIOA). However, false positive rate (FPR) and false negative rate (FNR) of RGA were greatly lower than those of other algorithms. RGA greatly improved the accuracy of pelvic tumor detection. The peak signal-to-noise ratio (PSNR) of RGA was superior to that of WA and SIOA, but differences in edge preservation index (EPI) value were not significant. The diagnosis rate of the experimental group was 48/50 (96%), while the diagnosis rate by manual means was 38/50 (76%). For the diagnosis rate and total efficiency, results of the experimental group were evidently higher in contrast to the control group ( P < 0.05 ). In conclusion, under RGA, CTA image-guided pelvic lymphadenectomy had good segmentation accuracy and denoising performance, and it was superior in total efficiency and diagnosis rate, which was worthy of clinical promotion.

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MR imaging of pelvic extraperitoneal masses: A diagnostic approach

Cited by 13 publications

References 17 publications

MRI of Tumors and Tumor Mimics in the Female Pelvis: Anatomic Pelvic Space–based Approach

MRI of Tumors and Tumor Mimics in the Female Pelvis: Anatomic Pelvic Space–based Approach

Extragonadal Perirectal Mature Cystic Teratoma in the Adult Male

Region-Growing Algorithm on CT Angiography Images for Detection of Gynecological Malignant Tumor

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