Investigation of imaging features in contrast-enhanced magnetic resonance imaging of benign and malignant breast lesions.

Purpose: This study aimed to enhance the diagnostic accuracy of contrast-enhanced breast magnetic resonance imaging (MRI) using gadobutrol for differentiating benign breast lesions from malignant ones. Moreover, this study sought to address the limitations of current imaging techniques and criteria based on the Breast Imaging Reporting and Data System (BI-RADS).

Materials And Methods: In a multicenter retrospective study conducted in Japan, 200 women were included, comprising 100 with benign lesions and 100 with malignant lesions, all classified under BI-RADS categories 3 and 4.

Simultaneous bilateral mastectomy and RRSO for BRCA2-positive non-invasive breast cancer in Japan: a case report and analysis of initial experience.

Background: In Japan, genetic testing, surveillance, and risk-reducing surgery for hereditary breast and ovarian cancer (HBOC) syndrome have been covered by the Japanese national insurance system since April 2020. On the other hand, the current situation is that medical care, including surveillance of undiagnosed (cancer-free) patients, is self-funded even for individuals with HBOC. We report a case in which breast cancer was diagnosed at an early stage during surveillance for cancer-free HBOC at the patient's own expense, and risk-reducing surgery was performed at the same time as treatment for breast cancer.

Automated Breast Volume Scanner, a new automated ultrasonic device, is useful to examine joint injuries in patients with rheumatoid arthritis.

Objective: To explore the clinical application of automated scanning of wrist and finger joints by an Automated Breast Volume Scanner (ABVS) in patients with rheumatoid arthritis (RA).

Methods: A total of 140 metacarpophalangeal (MCP) joints and 28 wrist joints from the 14 active RA patients were examined by both an ABVS system (the ACUSON S2000) from dorsal sites and by conventional ultrasonography (US) from multiple directions on the same day. We used a semiquantitative scale from 0 to 3 of synovial hypertrophy and the presence of bone erosion by grayscale for both methods; the efficacy of the two methods for identifying synovial hypertrophy and bone erosion were evaluated by kappa coefficient.

The MRI findings in a case of ovarian mucinous borderline tumor mimicking a serous surface borderline tumor.

Exophytic papillary growth from the surface epithelium is one of the features suggesting serous surface borderline tumors of the ovary in which magnetic resonance imaging (MRI) typically shows a hyperintense papillary mass with a hypointense internal branching structure on T2-weighted images. We herein report a case of an endocervical-like mucinous borderline tumor of the ovary, which showed an exophytic papillary growth pattern on MRI as well as pathology. Such a growth pattern is known to be characteristic of serous borderline tumors, but it should be noted that it could also be a finding in mucinous borderline tumors.

[Initial experience of magnetic resonance imaging-guided vacuum-assisted breast biopsy].

Almost all mammary lesions are detected by a mammography and an ultrasound. However, a small part of lesions cannot be shown by only a magnetic resonance imaging (MRI). MRI-guided vacuum-assisted breast biopsy is a very useful means for the pathological diagnosis of these lesions.

Spindle cell carcinoma of the breast: MR findings correlated with histopathology.

We correlate findings from magnetic resonance (MR) imaging and pathology in a 55-year-old woman with spindle cell carcinoma of the breast. Pathological examination showed a fibrous capsule at the margins and abundant fibromyxoid stroma within the mass. Spindle cell carcinoma may be included in the differential diagnosis of expanding round masses with internal components that demonstrate rapid initial enhancement with high signal intensity on T(2)-weighted images in postmenopausal women.

Multiple hepatocellular adenomas in a patient with glycogen storage disease type I: various enhancement patterns in MRI with Gd-EOB-DTPA.

The patient is a 20-year-old man with glycogen storage disease type I (GSD-type I). In his teens, multiple focal hepatic masses were detected on abdominal ultrasonography (US), which were diagnosed as multiple hepatocellular adenomas from the imaging. During follow-up, these masses had shown intermittent growth in size.

Diagnostic performance of ADC for Non-mass-like breast lesions on MR imaging.

We assessed the usefulness and limitations of utilizing apparent diffusion coefficient (ADC) values on diffusion-weighted imaging (DWI) for the differential diagnosis of benign and malignant non-mass-like breast lesions. We retrospectively reviewed 27 such lesions (16 malignant, 11 benign) detected on magnetic resonance (MR) imaging and analyzed the enhancing patterns of dynamic contrast-enhanced DCE-MRI (distribution and internal enhancement), kinetic curve patterns, and ADC values. All images were obtained with a 1.

Patient allocation based on preoperative assessment of pancreatic fibrosis to secure pancreatic anastomosis performed by trainee surgeons: a prospective study.

Background: A fragile or non-fibrotic pancreas increases the risk of postoperative pancreatic fistula (POPF) after pancreatic head resection, whereas pancreatic fibrosis decreases the risk. The degree of pancreatic fibrosis can be estimated using the time-signal intensity curve (TIC) of the pancreas, obtained with dynamic magnetic resonance imaging (MRI). We have investigated whether trainee surgeons can perform pancreatic anastomosis safely, without the occurrence of POPF, when patients are selected carefully based on a preoperative assessment of pancreatic fibrosis.

Diagnostic utility of diffusion-weighted magnetic resonance imaging in diabetic mastopathy.

We report the clinical findings in a 36-year-old woman with diabetic mastopathy. The lesion showed heterogeneous segmental enhancement on magnetic resonance imaging (MRI), resembling a malignant lesion, but diffusion-weighted imaging (DWI) showed no abnormalities and the apparent diffusion coefficient value did not decrease. This case emphasizes the utility of DWI for differentiating diabetic mastopathy from malignant breast lesions.

Monitoring fibrosis of the pancreatic remnant after a pancreaticoduodenectomy with dynamic MRI.

Background: The time-signal intensity curve (TIC) of the pancreas obtained from dynamic contrast-enhanced magnetic resonance imaging closely reflects the histological degree of pancreatic fibrosis.

Materials And Methods: Seventy-six patients who had undergone a pancreatic TIC analysis prior to receiving a pancreaticoduodenectomy for various reasons were subjected to a yearly monitoring with pancreatic TIC for the pancreatic remnants. The pancreatic TIC profiles were classified into 3 types: type I, indicating a normal pancreas without fibrosis; and types II and III indicating fibrotic pancreas.

Magnetic resonance imaging features of breasts in patients with nipple discharge.

A retrospective study was conducted to demonstrate the potential role of dynamic contrast enhanced magnetic resonance imaging (DCEMRI) in the detection of breast lesions in 15 patients with nipple discharge. The DCEMRI findings were compared and correlated with the findings of ultrasonography and mammography. The results revealed that the character of the nipple discharge was mostly bloody and in few cases were serous.

Pancreatic carcinoma coexisting with chronic pancreatitis versus tumor-forming pancreatitis: diagnostic utility of the time-signal intensity curve from dynamic contrast-enhanced MR imaging.

Aim: To evaluate the ability of the time-signal intensity curve (TIC) of the pancreas obtained from dynamic contrast-enhanced magnetic resonance imaging (MRI) for differentiation of focal pancreatic masses, especially pancreatic carcinoma coexisting with chronic pancreatitis and tumor-forming pancreatitis.

Methods: Forty-eight consecutive patients who underwent surgery for a focal pancreatic mass, including pancreatic ductal carcinoma (n=33), tumor-forming pancreatitis (n=8), and islet cell tumor (n=7), were reviewed. Five pancreatic carcinomas coexisted with longstanding chronic pancreatitis.

Clinical significance of categorisation of mammographic density for breast cancer prognosis.

Mammographic density reflects comprehensive changes in the mammary gland. The condition of the tumour microenvironment is a possible factor affecting tumour progression, as well as a tumour risk factor. This study aimed to determine whether mammographic density correlates with tumour clinicopathological features and prognosis in breast cancer patients.

[Evaluation of strongly hyperintense area in breast lesions on fat-suppressed T2-weighted images correlated with histopathology].

The purpose of this study was to correlate strongly hyperintense areas(SHI) in breast lesions on FS-T2WI with histopathology and to evaluate the usefulness of the distribution patterns of SHI in the differentiation of benign and malignant breast lesions. MR imaging with pathological correlation was available in 157 breast lesions of 153 patients. The distribution patterns of SHI were classified into seven types.

Use of the time-signal intensity curve from dynamic magnetic resonance imaging to evaluate remnant pancreatic fibrosis after pancreaticojejunostomy in patients undergoing pancreaticoduodenectomy.

Background: This study assessed the value of the time-signal intensity curve (TIC) obtained from dynamic magnetic resonance imaging (MRI) in the evaluation of remnant pancreatic fibrosis after pancreaticojejunostomy in patients undergoing pancreaticoduodenectomy.

Methods: Two modes of pancreaticojejunostomy-duct-to-mucosa anastomosis (DMA; 24 patients) and pancreatojejunoserosal anastomosis (PJSA; 22 patients)-were used in 46 consecutive patients undergoing pancreaticoduodenectomy. All patients underwent dynamic contrast-enhanced MRI of the pancreas before pancreaticoduodenectomy.

Sarcoidosis of the breast.

We report a case of sarcoidosis of the breast in a 31-year-old woman who presented with a palpable breast mass. The mammography showed a spiculated mass without any microcalcifications. Ultrasonogram showed a hypoechoic mass.

Unenhanced CT findings of vascular compromise in association with intussusceptions in adults.

Objective: The purpose of this study was to evaluate unenhanced CT findings for predicting the degree of vascular compromise in intussusception observed at surgery.

Materials And Methods: The imaging studies, clinical records, and surgical and pathologic findings in 25 patients with intussusception were reviewed retrospectively. We evaluated six CT findings based on the abnormalities of each component of intussusception.

Successful treatment of bleeding due to ileal varices in a patient with hepatocellular carcinoma.

This case report concerns a 62-year-old female who was known to have cirrhosis. An endoscopic examination showed no evidence of haemorrhaging due to either oesophageal or gastric varices. Angiographic studies demonstrated extravasation from the ileal varices.

Granular Cell Tumor of the Breast: A Case Report Describing Dynamic MR Mammography.

A case of granular cell tumor of the breast in a 36-year-old woman is reported. The patient presented with a hard mass,1.5 cm in diameter in the upper-outer quadrant of the left breast.

[Gradually enhancing breast cancer on dynamic MRI].

Purpose: The aim of our study was to evaluate the frequency and the radiologic and pathologic features of gradually enhancing breast cancers on contrast enhanced dynamic MRI.

Material And Methods: 83 patients with pathologically proven breast cancer underwent contrast enhanced dynamic MRI. Breast cancers that showed a gradually enhancing pattern were selected, and their pathological features and the findings in other imaging modalities were retrospectively analyzed.

Evaluation of aberrant bile ducts before laparoscopic cholecystectomy: helical CT cholangiography versus MR cholangiography.

Objective: The purpose of our study was to compare the accuracy of helical CT cholangiography and that of MR cholangiography in the diagnosis of aberrant bile ducts or cystic ducts before laparoscopic cholecystectomy.

Subjects And Methods: A total of 120 consecutive patients, including 114 patients with cholecystolithiasis and six with gallbladder polyps, were treated using laparoscopic cholecystectomy between November 1996 and August 1998. Eighteen (15%) of the 120 patients were suspected of having aberrant bile ducts or cystic ducts on helical CT cholangiography, and 16 of these 18 patients were subsequently examined on MR cholangiography.

[Diagnosis of common bile duct stones by MR imaging, mainly MR cholangiopancreatography].

We evaluated the accuracy of MR imaging (MRI), mainly MR cholangiopancreatography (MRCP), in the diagnosis of choledocholithiasis in comparison with ultrasound (US), computed tomography (CT), direct cholangiography, and intravenous cholangiography (DIC). Thirty-seven patients with biliary disease diagnosed by surgery and direct cholangiography underwent MRI with T1-weighted images (T1-WI), T2-weighted images (T2-WI), and MRCP (source images and projection images). The rate of stone detection was evaluated for each MRI image and modality.

[Differentiation between benign and malignant breast lesions using fat-suppressed dynamic MR imaging].

Purpose: To assess the value and problems of fat-suppressed dynamic MR imaging in differentiating between benign and malignant lesions.

Materials And Methods: In twenty-nine patients who underwent excisional biopsy or surgical resection, fat-suppressed dynamic MR imaging was performed with a 0.5 T superconducting magnet.