CT and MRI findings of cystadenofibromas of the ovary

MRI combined with clinical features to differentiate ovarian thecoma-fibroma with cystic degeneration from ovary adenofibroma

OBJECTIVE

To explore the value of magnetic resonance imaging (MRI) and clinical features in identifying ovarian thecoma-fibroma (OTF) with cystic degeneration and ovary adenofibroma (OAF).

METHODS

A total of 40 patients with OTF (OTF group) and 28 patients with OAF (OAF group) were included in this retrospective study. Univariable and multivariable analyses were performed on clinical features and MRI between the two groups, and the receiver operating characteristic (ROC) curve was plotted to estimate the optimal threshold and predictive performance.

RESULTS

The OTF group had smaller cyst degeneration degree (P < .001), fewer black sponge sign (20% vs. 53.6%, P = .004), lower minimum apparent diffusion coefficient value (ADCmin) (0.986 (0.152) vs. 1.255 (0.370), P < .001), higher age (57.4 ± 14.2 vs. 44.1 ± 15.9, P = .001) and more postmenopausal women (72.5% vs. 28.6%, P < .001) than OAF. The area under the curve of MRI, clinical features and MRI combined with clinical features was 0.870, 0.841, and 0.954, respectively, and MRI combined with clinical features was significantly higher than the other two (P < .05).

CONCLUSION

The cyst degeneration degree, black sponge sign, ADCmin, age and menopause were independent factors in identifying OTF with cystic degeneration and OAF. The combination of MRI and clinical features has a good effect on the identification of the two.

ADVANCES IN KNOWLEDGE

This is the first time to distinguish OTF with cystic degeneration from OAF by combining MRI and clinical features. It shows the diagnostic performance of MRI, clinical features, and combination of the two. This will facilitate the discriminability and awareness of these two diseases among radiologists and gynaecologists.

Ovarian Cystadenofibroma: An Innocent Tumor Causing Early Postoperative Small Bowel Obstruction and Perforation Peritonitis

Ovarian serous cystadenofibroma (CAF) is a relatively uncommon variant of benign epithelial tumors of the ovary. It is frequently misdiagnosed as malignant ovarian mass, on both ultrasound (USG) and computed tomography (CT). Although most cases are easily treatable by surgery, some cases can present with life-threatening complications increasing patient morbidity and mortality. The present case report briefs about a 69-year-old female, P4 L4, who presented to the gynecology outpatient department with a complaint of pain in the lower abdomen for 2-3 months. USG and CT were suggestive of a suspicious-looking ovarian mass favoring malignancy. A staging laparotomy with pelvic and para-aortic lymphadenectomy with omental biopsy was done. Although the tumor was benign, extensive surgery, due to the suspicion of malignancy led to the patient developing early postoperative small bowel obstruction, mandating a re-exploration. CAF is a specific type of ovarian tumor that exhibits a combination of benign characteristics. This tumor presents as a partly cystic (containing fluid-filled sacs) and partly solid (composed of fibrous tissue) growth within the ovary, displaying a diverse architectural pattern. Mostly the diagnosis is incidental, on USG done for some other indication. CAF of the ovary needs a very high index of suspicion for diagnosis as these are frequently misdiagnosed as malignant ovarian masses. Although an innocent tumor, extensive surgery done for CAF, under suspicion for malignancy, can sometimes lead to serious complications.

A case report of mucinous cystadenoma with contralateral serous cystadenofibroma in identical twin

Introduction

There are limited reports on ovarian neoplasm occurring among identical twins. Most previous reports showed ovarian teratoma found in both twins. Herein, we report for the first time a case of ovarian mucinous cystadenoma with contralateral serous cystadenofibroma found in twin siblings.

Case report

One patient suffered from abdominal distension and the following computed tomography found ovarian mucinous cystadenoma. During the laparoscopy, another ovarian mass was found in the contralateral ovary. The histopathology revealed ovarian mucinous cystadenoma with contralateral serous cystadenofibroma. The twin sister had no symptoms but underwent gynecological screening. She also showed a similar finding, mucinous cystadenoma with serous cystadenofibroma on the contralateral ovary. Both patients underwent laparoscopic bilateral ovarian cystectomy.

Conclusion

This is the first clinical report on left ovarian mucinous cystadenoma with right serous cystadenofibroma in twin siblings. Our cases support awareness of ovarian tumors in twin sisters.

MRI Appearance of a Giant Ovarian Sero-mucinous Cystadenofibroma Mimicking Ascites. A Case Report and Brief Literature Review

Introduction: Giant ovarian cystadenofibromas are rare, mostly benign tumors. In the early stages, they are asymptomatic; however, as they grow in size, they begin to produce symptoms, most often due to the compressive effects they exert on surrounding structures. In the early stages, they are frequently diagnosed by ultrasonography, but complicated cases or cystadenofibromas that reach giant dimensions are ideally evaluated by magnetic resonance imaging (MRI) to establish a therapeutic surgical decision that is as safe as possible for the patient.

Case report: We present the case of a 49-year-old perimenopausal patient without vaginal bleeding or other gynecological symptoms who presented to the hospital with abdominal pain and abdominal distension with increasing intensity. Ultrasound examination revealed the presence of a high volume of fluid in the abdomen, and MRI and histopathological examination confirmed the diagnosis of a giant left ovarian type III seromucinous cystadenofibroma. The patient was treated surgically, with favorable postoperative evolution.

Conclusion: Giant cystadenofibromas are rare clinical entities that must always be considered in the differential diagnosis of an abdominopelvic pathology in middle-aged female patients and should ideally be investigated by MRI to accurately define their origin, characteristics, and local invasion.

Ovarian remnant syndrome with paraintestinal ovarian serous cystadenofibroma arose 30 years after bilateral salpingo-oophorectomy: A case report

RATIONALE

Ovarian cystadenofibroma is a relatively rare benign ovarian tumor. Ovarian remnant syndrome (ORS) is a rare complication of bilateral salpingo-oophorectomy (BSO). We report a rare case of ORS with paraintestinal ovarian serous cystadenofibroma that developed 30 years after total abdominal hysterectomy and BSO in a 73-year-old woman.

PATIENT CONCERNS

A 73-year-old woman complained of long-term lower abdominal discomfort.

DIAGNOSIS

She was diagnosed with a cystic lesion in the lower abdomen on transabdominal ultrasonography. Further diagnostic imaging and laboratory tests could not exclude a diagnosis of malignancy.

INTERVENTIONS

The patient underwent laparoendoscopic single-site surgery. We found one cystic lesion 5 cm in size with multiple septa that was adhered to the small bowel. We consulted a general surgeon for tumor resection. Dissection was performed and the specimen was then removed from the umbilical wound.

OUTCOMES

Histopathological examination revealed an ovarian serous cystadenofibroma. The postoperative recovery was uneventful.

LESSONS

Patients with lower abdominal pain after a previous hysterectomy and BSO should be examined with transabdominal sonography for ORS.

Ultrasound Characteristics of Cystadenofibromas: A Retrospective Multicenter Study

ABSTRACT

Cystadenofibromas (CAFs) are relatively rare benign ovarian tumors. This study was to describe the ultrasound (US) findings of CAFs. Preoperative US information of 86 CAFs was retrospectively collected. To better illustrate their characteristic, 173 cystadenomas (CADs), 103 borderline ovarian tumors (BOTs), and 129 cystadenocarcinomas (CACs) were recruited as match groups. Besides morphology evaluation, tumors were categorized by the Ovarian-Adnexal Reporting and Data System US system. Higher-risk stratification in CAFs was more often being seen than CADs (63% of CAFs classified as Ovarian-Adnexal Reporting and Data System 4 or 5 vs 35% in CADs). Cystadenofibromas more commonly appeared as unilocular or multilocular solid than CADs. Solid components presented in 59% of CAFs and papillary projections presented in 45%. More CAFs contained solid components and papillary projections than CADs (P < 0.0001). When compared with BOTs and CACs, less CAFs contained solid components (P < 0.017 and P < 0.0001). However, no significant difference was found in CAFs versus BOTs or CACs about the presence of papillary projections. Shadowing was identified in 58% of CAFs; however, in CADs, BOTs, and CACs, the proportion was 2%, 11%, and 11%, respectively. Presence of shadowing in CAFs was noticeably more than CADs, BOTs, and CACs (P < 0.017 or P < 0.0001). Similar to CADs, most CAFs were avascular (76%) and without ascites (99%), which were significantly different from BOTs and CACs. We concluded that the sonographic markers for CAFs that differ from malignant were presence of shadowing, avascular, and absence of ascites.

Pearls and Potential Pitfalls for Correct Diagnosis of Ovarian Cystadenofibroma in MRI: A Pictorial Essay

Ovarian cystadenofibroma is a benign ovarian tumor that is characterized by a consistent percentage of masses, which remain indeterminate in ultrasonography and require magnetic resonance (MR) investigation; they may mimic borderline or malignant lesions. Three main morphologic patterns, resembling different ovarian neoplasms, can be identified in cystadenofibromas: multilocular solid lesions, unilocular cystic lesions with parietal thickening, and purely cystic masses. However, a cystoadenofibroma has typical features, such as T2-weighted hypointensity associated with no restrictions in diffusion-weighted imaging (the so-called "dark-dark appearance") and progressive post-contrast enhancement (type I perfusion curve). The purpose of this study was to review the features of ovarian cystadenofibromas in MR imaging and to suggest pearls and pitfalls regarding their correct diagnosis.

A case of ovarian serous cystadenofibroma with scattered lesions in pelvic cavity, like malignant disseminations

Ovarian serous cystadenofibroma is a relatively rare subtype of serous cystadenoma classified as ovarian benign epithelial tumor. We report a rare case of ovarian serous cystadenofibroma with scattered lesions in pelvic cavity, like malignant disseminations. The patient was 22 years old, gravida 0, para 0. In the laparoscopic surgery, numerous hard yellowish-white solid masses of various sizes were present in the bilateral ovaries. Grossly similar masses were scattered in the fimbria of the fallopian tubes, peritoneum, and great omentum. Because the intraoperative rapid histological diagnosis was benign tumor, surgery was completed for only tumor excision. Postoperative histopathological diagnosis is serous cystadenofibroma. Similar pathological findings were noted in the scattered lesions in the peritoneum and great omentum. No malignant or borderline malignant finding was observed. Because of a benign disease, careful treatment taking fertility preservation into consideration is necessary, especially for young patients.

Benign Brenner tumour of the ovary: CT and MRI features

AIM

To evaluate the computed tomography (CT) and magnetic resonance imaging (MRI) features of benign Brenner tumours (BBT) of the ovary.

MATERIAL AND METHODS

This was a retrospective two-centre study comprising 35 female patients with a definitive diagnosis of BBT at histology in whom CT and/or MRI examinations had been performed. Two experienced radiologists reviewed the CT and MRI features of 39 ovarian BBT retrospectively with consensus reading. The morphological appearance and size of each tumour were recorded. The presence or absence of calcifications within the solid portion was noted at CT. The reviewed characteristics at MRI included qualitative assessment of the signal intensity of the solid portion on diffusion sequence and contrast enhancement, compared to that of the myometrium.

RESULTS

CT and MRI images were available for 27 and 28 lesions, respectively. Sixteen patients had both CT and MRI examinations. BBT were unilateral in 89% of patients, and 49% of lesions were solid and 51% were mixed. Calcifications were depicted at CT in 70.4% of lesions. When present, the cystic portion was multilocular in 85% of cases and corresponded to a mucinous lesion in 74% of cases. Enhancement of the solid portion at MRI was inferior or equal to that of the myometrium in 89% of cases and signal on high b-values diffusion images was deemed low or moderate in 93% of cases.

CONCLUSION

The combined CT and MRI findings of a unilateral fibrous ovarian mass containing punctate calcifications often associated with a multilocular cyst suggest the diagnosis of ovarian BBT.

Adnexal masses characterized on 3 tesla magnetic resonance imaging - added value of diffusion techniques

Background

To assess different types of adnexal masses as identified by 3T MRI and to discuss the added value of diffusion techniques compared with conventional sequences.

Patients and methods

174 women age between 13 and 87 underwent an MRI examination of the pelvis for a period of three years. Patients were examined in two radiology departments – 135 of them on 3 Tesla MRI Siemens Verio and 39 on 3 Tesla MRI Philips Ingenia. At least one adnexal mass was diagnosed in 98 patients and they are subject to this study. Some of them were reviewed retrospectively. Data from patients’ history, physical examination and laboratory tests were reviewed as well.

Results

124 ovarian masses in 98 females’ group of average age 47.2 years were detected. Following the MRI criteria, 59.2% of the cases were considered benign, 30.6% malignant and 10.2% borderline. Out of all masses 58.1% were classified as cystic, 12.9% as solid and 29% as mixed. Оf histologically proven tumors 74.4% were benign and 25.6% were malignant. All of the malignant tumors had restricted diffusion. 64 out of all patients underwent contrast enhancement. (34 there were a subject of contraindications). 39 (61%) of the masses showed contrast enhancement.

Conclusions

Classifying adnexal masses is essential for the preoperative management of the patients. 3T MRI protocols, in particular diffusion techniques, increase significantly the accuracy of the diagnostic assessment.

Microcystic pattern and shadowing are independent predictors of ovarian borderline tumors and cystadenofibromas in ultrasound

OBJECTIVES

To determine the sonographic characteristics of borderline tumors (BoTs) and cystadenofibromas (CAFs).

METHODS

Preoperative sonograms from consecutive patients who had at least one primary epithelial tumor in the adnexa were retrospectively collected. All tumors were described using the International Ovarian Tumor Analysis terminology. Ultrasound variables were tested using multinomial logistic regression after univariate analysis.

RESULTS

A total of 650 patients were included in this study. Of these, 110 had a CAF, 128 had a BoT, 249 had a cystadenoma (CAD), and 163 had a cystadenocarcinoma (CAC). Nearly half of CAFs and more than half of BoTs and CACs appeared to be unilocular and multilocular solid on the ultrasound images, while CADs were predominantly uni- or multilocular (p < 0.001). Overall, shadowing was identified in 82/650 cases. Sixty-five of 110 (59.1%) CAFs exhibited an acoustic shadow, compared with only 4/249 (1.6%) in CADs, 7/128 (5.5%) in BoTs, and 6/163 (3.7%) in CACs (p < 0.001). Furthermore, 112/650 cases demonstrated microcystic pattern (MCP). Sixty-eight of 128 (53.1%) BoTs exhibited MCP, compared with only 5/249 (2.0%) in CADs, 19/163 (11.7%) in CACs, and 20/110 (18.2%) in CAFs (p < 0.001). Logistic regression analysis revealed that shadowing is an independent predictor of CAFs, while MCP is an independent predictor of BoTs.

CONCLUSIONS

Sonographic findings for CAFs and BoTs were complex and partly overlapped with those for CACs. However, proper recognition and utilization of shadowing or MCP may help to correctly discriminate CAFs and BoTs.

KEY POINTS

• Sonographic findings for borderline tumors and cystadenofibromas are complex and mimic malignancy. • Microcystic pattern and shadowing are independent predictors of borderline tumors and cystadenofibromas respectively.

Coexistence of ovarian serous papillary cystadenofibroma and type A insulin resistance syndrome in a 14-year-old girl: A case report

BACKGROUND

Type A insulin resistance syndrome is a rare disorder caused by mutations in the gene encoding the insulin receptor. Its coexistence with ovarian serous papillary cystadenofibroma is even rarer.

CASE SUMMARY

A 14-year-old girl developed type A insulin resistance syndrome and showed high fasting insulin, glucose, and hemoglobin A1c (HbA1c) levels. The girl suffered from ovarian serous papillary cystadenofibroma. The laboratory results were as follows: fasting insulin was 2624.90 pmol/L and HbA1c was 8.5%. A heterozygous missense mutation on exon 20 of the insulin receptor gene (c.3601C>T, Arg1201Trp) was observed. The histopathological diagnosis was a cystic lesion that extended to the upper right uterus, indicating a right ovarian serous papillary cystadefibroma accompanied by focal interstitial hyperplasia. The patient was treated with metformin for over 6 mo. Additionally, laparoscopic resection (bilateral) of the ovarian lesion and laparoscopic intestinal adhesiolysis were performed under general anesthesia. Diet therapy combined with exercise was then initiated. The patient had an uneventful recovery. The patient also showed improved blood glucose control, with reduced levels of fasting insulin (857.84 pmol/L) and HbA1c (7.0%).

CONCLUSION

Insulin resistance may play a significant role in the induction of tumors. It is important to investigate further the association between insulin resistance and tumors and the underlying mechanism.

Borderline serous ovarian neoplasm: case report of a diagnostic challenge in intraoperative frozen sections

Surface epithelial tumors of the ovary account for 25% of all ovarian neoplasms. When composed predominantly of fibrous stroma, with glands and cysts forming a minor component, their appearance on imaging is often complex; cystic- to solid-appearing masses often raise suspicion of a malignant tumor. An accurate frozen histopathological diagnosis of a benign cystadenofibroma of this tumor can facilitate appropriate surgical management. However, it is equally important to diagnose areas of borderline changes/malignancy arising in these tumors, particularly when large or complex surface and inner papillary areas with multilayering or stratification are seen microscopically. We present here a case of bilateral complex ovarian mass in a 68-year-old woman, which was equivocal for malignancy on radiology, per operative gross examination as well as on frozen section evaluation. It was finally diagnosed as a borderline serous tumor (BOT) in a cystadenofibroma on histopathological examination.

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Borderline tumors among surface epithelial tumors with a prominent stromal component are uncommon.

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Adhesions & bilaterality with a prominent stromal component result in radiological interpretation of a complex ovarian mass.

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The Risk of Malignancy Index is usually <200 if the CA125 is low.

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Intraoperative surgical decisions are based on frozen section examination which are challenging.

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A benign tumor diagnosis may results in inadequate surgery, additional interventions later and possible tumor spread.

Diagnosis and Management of Ovarian Tumor in Mayer-Rokitansky-Küster-Hauser (MRKH) Syndrome

In the most recent publications on Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome, the uterine remnants and ovaries in patients may develop uterine remnant leiomyoma, adenomyosis, or ovarian tumor, and this can lead to problems in differential diagnosis. Here we summarize the diagnosis methods and available interventions for ovarian tumor in MRKH syndrome, with emphasis on the relevant clinical findings and illustrative relevant case. According to the clinical findings and illustrative relevant case, with the help of imaging techniques, ovarian tumors can be detected in the pelvis in patients with MRKH syndrome and evaluated in terms of size. Laparoscopy could further differentiate ovarian tumors into different pathological types. In addition, laparoscopic surgery not only is helpful for the diagnosis of MRKH combined ovarian tumor, but also has a good treatment role for excising ovarian tumor at the same time. Moreover, laparoscopic removals of ovarian tumor can be considered as a safe and reliable treatment for conservative management.

Autoantibodies against HSF1 and CCDC155 as Biomarkers of Early-Stage, High-Grade Serous Ovarian Cancer

Background: Tumor-directed circulating autoantibodies (AAb) are a well-established feature of many solid tumor types, and are often observed prior to clinical disease manifestation. As such, they may provide a good indicator of early disease development. We have conducted a pilot study to identify novel AAbs as markers of early-stage HGSOCs.Methods: A rare cohort of patients with early (FIGO stage Ia-c) HGSOCs for IgG, IgA, and IgM-mediated AAb reactivity using high-content protein arrays (containing 9,184 individual proteins). AAb reactivity against selected antigens was validated by ELISA in a second, independent cohort of individual patients.Results: A total of 184 antigens were differentially detected in early-stage HGSOC patients compared with all other patient groups assessed. Among the six most highly detected "early-stage" antigens, anti-IgA AAbs against HSF1 and anti-IgG AAbs CCDC155 (KASH5; nesprin 5) were significantly elevated in patients with early-stage malignancy. Receiver operating characteristic (ROC) analysis suggested that AAbs against HSF1 provided better detection of early-stage malignancy than CA125 alone. Combined measurement of anti-HSF1, anti-CCDC155, and CA125 also improved efficacy at higher sensitivity.Conclusions: The combined measurement of anti-HSF1, anti-CCDC155, and CA125 may be useful for early-stage HGSOC detection.Impact: This is the first study to specifically identify AAbs associated with early-stage HGSOC. The presence and high frequency of specific AAbs in early-stage cancer patients warrants a larger scale examination to define their value for early disease detection at primary diagnosis and/or recurrence. Cancer Epidemiol Biomarkers Prev; 27(2); 183-92. ©2017 AACR.

Ovarian Fibroma: A Clinico-pathological Study of 23 Cases with Review of Literature

PURPOSE

The purpose of this study was to correlate the clinical findings, RMI-4 index and frozen section, in cases of ovarian fibroma with the final histopathology.

METHODS

This is a retrospective study of clinical and pathological features of 23 patients of ovarian fibroma. The patient's age ranged from 34 to 66 years (mean-49 years). The most common presenting symptom was abdominal pain. On clinical examination, the mean size of ovarian tumor was 9.5 cm, CA-125 levels were found to be raised in 14 patients, and it was associated with ascites in 10 patients. USG showed a well-circumscribed mass (with a mean size of 14 cm), on the left side in 14 cases and on the right side in 9 patients. RMI-4 was calculated in all the patients, and it revealed the possibility of a benign histology in 17 patients. All patients underwent exploratory laparotomy with the removal of ovarian tumor followed by frozen section examination. All but one (22/23) patient had positive correlation among frozen section and final histopathological findings.

RESULT

Ovarian fibroma generally tends to occur in post-menopausal women. All the patients in our study of ovarian fibroma were symptomatic, with the presence of palpable mass in majority of patients. RMI-4 Index correlated very well with benign nature of disease. Frozen section has an invaluable role at surgery; fertility-conserving surgery is the choice in young women.

CONCLUSION

Clinical findings, RMI-4 Index and frozen section, play vital roles before and during surgery in cases of benign ovarian tumors.

MR imaging of ovarian masses: classification and differential diagnosis

OBJECTIVE

We propose a Magnetic Resonance Imaging (MRI) guided approach to differential diagnosis of ovarian tumours based on morphological appearance.

BACKGROUND

Characterization of ovarian lesions is of great importance in order to plan adequate therapeutic procedures, and may influence patient's management. Optimal assessment of adnexal masses requires a multidisciplinary approach, based on physical examination, laboratory tests and imaging techniques. Primary ovarian tumours can be classified into three main categories according to tumour origin: epithelial, germ cell and sex cord-stromal tumours. Ovarian neoplasms may be benign, borderline or malignant. Using an imaging-guided approach based on morphological appearance, we classified adnexal masses into four main groups: unilocular cyst, multilocular cyst, cystic and solid, predominantly solid. We describe MR signal intensity features and enhancement behaviour of ovarian lesions using pathologically proven examples from our institution.

CONCLUSION

MRI is an essential problem-solving tool to determine the site of origin of a pelvic mass, to characterize an adnexal mass, and to detect local invasion. The main advantages of MRI are the high contrast resolution and lack of ionizing radiation exposure. Although different pathological conditions may show similar radiologic manifestations, radiologists should be aware of MRI features of ovarian lesions that may orientate differential diagnosis.

TEACHING POINTS

• Diagnostic imaging plays a crucial role in detection, characterization and staging of adnexal masses. • Characterization of an ovarian lesion may influence patient's management. • Different pathological conditions may have similar radiologic manifestations. • Non-neoplastic lesions should always be taken into consideration.

Large ovarian cystadenofibroma causing large bowel obstruction in a patient with Klippel-Feil syndrome-A case report

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MR imaging may help to determine origin and dignity before surgery.

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Explorative laparotomy is the appropriate surgical approach for masses of unclear origin and dignity.

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Intraoperative frozen-sections can avoid extensive fertility impairing surgery.

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Interdisciplinary management is mandatory in patients with Klippel–Feil syndrome.

Introduction

Ovarian cystadenofibromas (CAF) are epithelial tumors, which are fairly rare, mainly benign and asymptomatic. The Klippel–Feil syndrome (KFS) is a rare congenital anomaly which combines osseous and visceral development disorders. While bowel obstruction is a common complication in advanced ovarian cancer this condition is rarely described in cystic lesions such as CAF. We report the first case of large bowel obstruction due to a large benign ovarian CAF with an underlying KFS.

Presentation of case

A 60-year-old women with a KFS was admitted to the hospital with increasing abdominal girth and bowel obstruction. A CT scan revealed a massive intraabdominal cystic tumor of unclear origin, causing compression of the sigmoid colon with consecutive dilatation of the ascending colon and the small bowel. After successful conservative ileus treatment including nasogastric tube and iv fluids for a few days, we performed an explorative laparotomy, revealing a large cystic tumor originating from the left adnexe. After its removal including left adnexectomy, histological findings confirmed a benign cystadenofibroma. The hospital stay was uneventful and bowel obstruction symptoms resolved immediately.

Discussion

Beside careful history taking and physical examination, diagnostic imaging is important to identify CAF. However, the distinction between benign and malignant lesions remains difficult even using MRI. Considering optimal preparation of the patient with successful ileus treatment, laparoscopy may have been the surgical approach of choice. Though, direct laparotomy seemed to be the appropriate approach, considering the unclear origin and dignity of the lesion. Considering the KFS and its inherent malformations interdisciplinary cooperation seems important in such rare cases.

Conclusion

Preoperative MR imaging and intraoperative frozen-sections can be helpful to determine the dignity of the neoplasm and avoid fertility impairing adnexectomy in young woman. Interdisciplinary management of such rare conditions seems of utmost importance.

A case of mucinous cystadenofibroma of the ovary

Ovarian adenofibroma is a rare benign tumour originating from the germinal lining and stroma of the ovary. We describe here the case of a 36-year-old woman with an ovarian mucinous cystadenofibroma that was diagnosed as a benign cystic mass of the ovary before surgery. The tumour was a cystic lesion composed of 2 regions: one filled with mucinous fluid and the other with yellowish solid components. The patient successfully underwent a left oophorectomy.

Diffusion-weighted MR imaging findings of ovarian adenocarcinofibromas and adenofibromas

We retrospectively evaluated pelvic magnetic resonance imaging including diffusion-weighted imaging (DWI) of 16 ovarian lesions (5 adenocarcinofibromas, 2 borderline adenofibromas, and 9 benign adenofibromas). All adenocarcinofibromas were detected as large solid areas of strong high signal on DWI, and seven of nine benign adenofibromas and both borderline adenofibromas demonstrated no areas of high signal or small areas of weak high signal. Solid components that appear as areas of strong high signal on DWI might represent a characteristic finding of adenocarcinofibromas.

Ovarian mucinous cystadenoma coexisting with benign Brenner tumor: MR imaging findings

PURPOSE

The purpose of this study was to describe the MR imaging findings of ovarian mucinous cystadenomas coexisting with benign Brenner tumors.

MATERIALS AND METHODS

MR images with a 1.5-T unit obtained in five consecutive patients (age range, 51-72 years; mean age, 61 years) with surgically confirmed ovarian mucinous cystadenomas coexisting with benign Brenner tumors were retrospectively reviewed for the presence, configuration, and signal intensity of cystic and solid components of the lesions.

RESULTS

Tumors ranged in size from 7.5 to 22.1 cm (mean, 13.5 cm). In four patients (80%), the size of mucinous cystadenoma (range 6.4-22.1 cm; mean, 12.5 cm) was larger than that of Brenner tumor (range 0.2-9.1 cm; mean, 2.8 cm). All patients (100%) had cystic, and three (60%) had solid components. Four patients (80%) showed multilocular cystic, and one (20%) showed unilocular cystic appearance. MR imaging findings were classified into three patterns: (1) a bulky solid mass adjacent to the cystic component, (2) a mural nodule at the periphery of the cystic component, and (3) a cystic component without a detectable solid component. All four multilocular cystic areas exhibited "stained glass" appearances on both T1- and T2-weighted images, and all three solid areas showed homogeneous hypointensity on T2-weighted images.

CONCLUSION

Mucinous cystadenomas were often larger than the coexisting benign Brenner tumors. Mucinous cystadenomas coexisting with benign Brenner tumors should be considered when multilocular or unilocular cystic components are accompanied by homogeneously hypointense solid components on T2-weighted images.

Large functional benign endometroid cystadenofibroma of the ovary leading to endometrial cystic glandular hyperplasia and postmenopausal bleeding

Benign endometroid cystadenofibroma of the ovary is a rare tumour with few reported cases. The association of endometroid cystadenofibroma with endometrial cystic glandular hyperplasia has not been previously reported to authors' knowledge. We are reporting a 75-year-old postmenopausal woman who presented with a large abdominopelvic mass corresponding to 30 weeks size gravid uterus and postmenopausal bleeding. She has a well-oestrogenised vagina. Ultrasound pelvis revealed a large cystic mass extending from pelvis to epigastrium with no solid component and few incomplete septations and no internal echoes. MRI findings showed mainly cystic component with few moderately enhancing, fine, incomplete septa. Endometrial aspiration reported histopathology of cystic glandular hyperplasia without atypia. Serum oestrogen level reported to be high (210 pg/mL). Hysterectomy with bilateral salpingo-oophorectomy was performed. Histopathology of the specimen revealed benign endometroid cystadenofibroma. She remained asymptomatic and disease free during her 6-month follow-up.

Ovarian adenofibromas and cystadenofibromas: magnetic resonance imaging findings including diffusion-weighted imaging

BACKGROUND

Ovarian adenofibromas (AF) and cystadenofibromas (CAF) belong to the surface epithelial-stromal tumors, and may appear as solid, or solid and cystic masses mimicking ovarian cancers.

PURPOSE

To evaluate the capability of magnetic resonance imaging (MRI) including diffusion-weighted imaging (DWI) with apparent diffusion coefficient (ADC) measurement for the diagnosis of ovarian AF/CAF.

MATERIAL AND METHODS

Magnetic resonance manifestations of 13 cases of ovarian AF/CAF were retrospectively evaluated. DWI was obtained in all 13 lesions, and mean ADC values in 11 lesions were compared with those in solid portions of 27 ovarian cancers. Results Neither case with AF/CAF revealed high signal intensity on DWI, whereas all ovarian cancers showed high signal intensity on DWI. The ADC values in the solid portions of AF/CAF were significantly higher than those of ovarian cancers (P < 0.001). A cut-off value of 1.20 × 10(-3) mm(2)/s for AF/CAF had a sensitivity of 82%, specificity of 93%, positive predictive value of 82%, and negative predictive value of 93%.

CONCLUSION

DWI with ADC measurement may be helpful in differentiating AF/CAF from ovarian cancers.

Anti-N-methyl-d-aspartate encephalitis with ovarian cystadenofibroma

We report the case of an adolescent girl with anti-N-methyl-D-aspartate-receptor (NMDAR) encephalitis who presented with focal seizures and hemichorea, followed by agitation, speech disturbance, mutism, and autonomic dysfunction. The institution of immunotherapy and removal of an ovarian cystadenofibroma led to full resolution of her symptoms with disappearance of serum NMDAR antibodies. This is the first report linking ovarian cystadenofibroma to anti-NMDAR encephalitis.

The MRI features of histologically proven ovarian cystadenofibromas-an assessment of the morphological and enhancement patterns

OBJECTIVES

To assess the morphological and enhancement features of histologically proven cystadenofibromas (CAFs) on magnetic resonance imaging (MRI).

METHODS

Forty-seven histologically proven CAFs (42 benign, five borderline) were retrospectively reviewed. One benign CAF had a synchronous adenocarcinoma in the same ovary. The morphological, signal and enhancement characteristics on MRI were recorded.

RESULTS

The mean long axis diameter of the CAFs was 80 mm. The contralateral ovary was abnormal in 45 % of cases. A solid component was seen in 85 %, which returned low T2-weighted signal in 75 % of CAFs. Septa were seen in 74 % and one CAF was purely cystic. The majority of solid components and septa demonstrated enhancement that was less than the myometrium. Wash-in rates (WIR) of the solid tissue were available for measurement in nine patients with an average WIR of 3.2 l/s.

CONCLUSION

This is the largest series describing MRI appearances of histologically proven CAFs. They are typically complex adnexal lesions containing septa, cystic components and solid tissue. The majority of solid components demonstrate low T2 signal and minimal enhancement. Almost half of the cases have an abnormal contralateral ovary.

Imaging of pediatric ovarian neoplasms

We review the clinical and imaging characteristics of the most common ovarian neoplasms in children and adolescents. Because of the widespread use of diagnostic imaging, incidental ovarian neoplasms might be encountered during the evaluation of abdominal pain, trauma or other indications and might pose a diagnostic dilemma. Conducting adequate imaging studies under these conditions is important, as management strategies differ according to the size and appearance of the lesion as well as the age of the patient. US dominates in gynecological imaging because of its excellent visualization, absence of ionizing radiation and sedation risks and comparatively low cost. For further examination of indeterminate lesions found using US, MRI is being used more progressively in this field, particularly for the evaluation of complex pelvic masses with the aim of distinguishing benign and malignant conditions and conditions requiring surgical intervention. CT is reserved primarily for tumor staging and follow-up and for emergency situations.

Peri- and post-menopausal incidental adnexal masses and the risk of sporadic ovarian malignancy: new insights and clinical management

Adnexal masses are common among peri- and post-menopausal women. Although ovarian cancer is a significant cause of mortality in menopausal women, large population-based studies demonstrate that the majority of adnexal masses are benign. Despite this, the appearance of an adnexal mass is a concern for the patient and an insight exercise for physicians. In most cases, an adnexal enlargement is an incidental finding, generally corresponding to a benign cyst and easily diagnosed by conventional ultrasound. Exceptionally an ovarian tumour may be malignant and should be treated as early as possible. When conventional ultrasound renders complex morphology other diagnostic tools must be used such as: colour Doppler and functional tumour vessel properties, serum CA 125 levels, nuclear magnetic resonance imaging and in some cases laparoscopy. Several new tumour markers are being studied for clinical application, although there are presently no clear recommendations. Adnexal masses with benign morphological and functional properties must be periodically monitored as an alternative to surgery since malignant transformation is exceptional.

Imaging of benign adnexal masses: characteristic presentations on ultrasound, computed tomography, and magnetic resonance imaging

Adnexal masses are common in the general population. Although ovarian cancer is a significant cause of mortality, large screening studies demonstrate that the majority of adnexal masses are benign. These benign masses include physiologic cysts, paraovarian masses, and benign ovarian lesions. It is important that gynecologists and radiologists appreciate the appearance of these lesions on multiple imaging modalities, including ultrasound, computed tomography, and magnetic resonance imaging to avoid unnecessary intervention.

[MR Imaging of primary ovarian tumors with pathologic correlation]

Ovarian tumors are classified based on the cell of origin into epithelial tumors, germ cell tumors and sex cord-stromal tumors. This pictorial essay illustrates the MR imaging features of the main ovarian tumors with pathologic correlation. These key features are helpful to suggest a specific diagnosis or narrow the differential diagnosis, in order to optimize the surgical approach.

Value of magnetic resonance imaging for the diagnosis of ovarian tumors: a review

This article reviews the value of magnetic resonance imaging (MRI) for the diagnosis of ovarian tumors especially when ultrasonography is indeterminate. Although ultrasonography is the first imaging technique used to investigate suspected pelvic masses, it has a limited capacity for tissue characterization. In addition to morphological characteristics, many tissue parameters such as T1, T2, perfusion, and diffusion contribute to signal intensity, so MRI is able to identify various types of tissue contained in pelvic masses. Magnetic resonance imaging helps to locate large solid masses and to distinguish benign from malignant ovarian tumors, with an overall accuracy of 88% to 93% for the diagnosis of malignancy. The aims of this review are 3-fold. First, we review state-of-the-art and usual MRI techniques and published findings. Second, we recall the MR features most useful for assessing the main ovarian tumors. Finally, we discuss the relevance of various features for distinguishing between benign, borderline, and invasive ovarian tumors.

MR imaging evaluation of the adnexa

MR imaging has become an important tool in the evaluation of patients with adnexal disease, and its role continues to evolve. Some benign entities can be diagnosed by MR imaging with a high grade of confidence, such as teratomas, endometriomas, simple and hemorrhagic cysts, fibromas, and hydrosalpinx. In cases of malignant lesions, MR imaging may be more accurate than other modalities for lesion characterization, staging, and follow-up.

MR imaging findings of ovarian cystadenofibroma and cystadenocarcinofibroma: clues for the differential diagnosis

Objective

We wanted to assess the MR imaging findings of ovarian cystadenofibroma and cystadenocarcinofibroma, and we wanted to find clues for making the differential diagnosis between them.

Materials and Methods

The MR images of 12 pathologically proven cystadenofibromas and two cystadenocarcinofibromas were reviewed, with a focus on the internal architecture, signal intensity and enhancement.

Results

All the tumors appeared as multilocular cysts, except for a single unilocular cystic mass and a single solid mass. The previously reported characteristic MR findings of cystadenofibroma (a multilocular cystic mass with a T2-dark-signal-intensity solid component containing small cystic locules) were found in only 43% of the tumors (6/14). Diffuse or partial thickening of the cyst wall with T2-dark signal intensity without a definite solid component was as common as the previous reported findings (6/14). Two cystadenocarcinofibromas showed more prominent solid portions with higher T2-signal intensities and stronger enhancement than did the cystadenofibromas.

Conclusion

Diffuse or partial thickening of the cyst wall with dark-signal-intensity in multilocular cystic masses may suggest ovarian cystadenofibroma, and this type of appearance may be as common as the previously reported characteristic appearance. A prominent solid component with a higher T2-signal intensity and strong enhancement are the typical findings of cystadenocarcinofibroma.

MR features of physiologic and benign conditions of the ovary

In reproductive women, various physiologic conditions can cause morphologic changes of the ovary, resembling pathologic conditions. Benign ovarian diseases can also simulate malignancies. Magnetic resonance imaging (MRI) can play an important role in establishing accurate diagnosis. Functional cysts should not be confused with cystic neoplasms. Corpus luteum cysts typically have a thick wall and are occasionally hemorrhagic. Multicystic lesions that may mimic cystic neoplasms include hyperreactio luteinalis, ovarian hyperstimulation syndrome, and polycystic ovary syndrome. Recognition of clinical settings can help establish diagnosis. In endometrial cysts, MRI usually provides specific diagnosis; however, decidual change during pregnancy should not be confused with secondary neoplasm. Peritoneal inclusion cysts can be distinguished from cystic neoplasms by recognition of their characteristic configurations. Ovarian torsion and massive ovarian edema may mimic solid malignant tumors. Recognition of normal follicles and anatomic structures is useful in diagnosing these conditions. In pelvic inflammatory diseases, transfascial spread of the lesion should not be confused with invasive malignant tumors. Radiologic identification of abscess formation can be a diagnostic clue. Many benign tumors, including teratoma, Brenner tumor, and sex-cord stromal tumor, frequently show characteristic MRI features. Knowledge of MRI features of these conditions is essential in establishing accurate diagnosis and determining appropriate treatment.

MR imaging compared with intraoperative frozen-section examination for the diagnosis of adnexal tumors; correlation with final histology

The aim was to compare the accuracy of magnetic resonance imaging (MRI) and intraoperative consultation (IC) for the diagnosis of adnexal masses, with reference to final histology. MRI was performed in 136 women with sonographically indeterminate adnexal masses. IC included macroscopic and frozen-section examination. Macroscopic examination and MRI determined size, nature, and presence of vegetations or solid portions within masses. All masses were characterized as benign or malignant according to previously published MR imaging and histopathologic criteria. Sensitivities, specificities, and predictive values for the diagnosis of malignancy of MRI and IC were assessed. Histology revealed 168 adnexal masses (99 benign, 23 borderline and 46 invasive). Frozen sections were examined in 151 cases. Among the 151 adnexal masses studied by both MRI and IC, respective sensitivities, specificities, positive and predictive values of both methods for the diagnosis of malignancy were 89.7% and 84.5%, 91.4% and 100%, 86.7% and 100%, and 93.4% and 91.3%. Sensitivities of MR imaging and frozen section for the diagnosis of serous versus mucinous borderline tumors were 33.3% and 93.3%, and 62.5% and 12.5%, respectively. MRI is less accurate than IC for characterizing adnexal masses. However, MRI may increase the relevance of IC for borderline mucinous tumors.