Use of two-dimensional multiple-slice magnetic resonance hydrography for diagnosis of hepatic hemangiomas and cysts.

Background/purpose: Although hepatic hemangiomas and cysts display very high signal intensities on conventional T2 images, their appearances are quite distinct using magnetic resonance hydrography (MRH). We examined the feasibility of using MRH in distinguishing hepatic cysts from hemangiomas.

Methods: We recruited 97 patients with hepatic hemangiomas and 65 with hepatic cysts.

Incidentally detected enhancing breast lesions on chest computed tomography.

Objective: To evaluate the nature and imaging appearance of incidental enhancing breast lesions detected on a routine contrast-enhanced chest CT.

Materials And Methods: Twenty-three patients with incidental enhancing breast lesions on contrast-enhanced chest CT were retrospectively reviewed. The breast lesions were reviewed by unenhanced and enhanced CT, and evaluated by observing the shapes, margins, enhancement patterns and backgrounds of breast lesions.

Value of sonographically guided needle sampling of cystic versus solid components in the diagnosis of complex cystic breast masses.

Background: The common practice for diagnosis of complex cystic breast masses (CCBM) may be imaging-guided aspiration or biopsy of cystic or solid components.

Purpose: To assess the diagnostic value of sonographically guided needle sampling of cystic and solid components for CCBM.

Material And Methods: Twenty patients with 20 CCBM underwent sonographically guided fine-needle aspiration biopsy (FNAB) for cystic components, followed by core needle biopsy (CNB) for residual solid components.

Atypical pulmonary metastases from a true malignant mixed tumor of the parotid gland.

A 58-year-old male patient presented with a recurrent true malignant mixed tumor of the parotid gland. Patchy pulmonary opacities were identified with a chest radiograph. Subsequently, a CT scan of the chest showed pulmonary parenchymal consolidation with amorphous calcifications.

A late complication of augmentation mammoplasty by polyacrylamide hydrogel injection: ultrasound and magnetic resonance imaging findings of huge galactocele formation in a puerperal woman with pathological correlation.

Polyacrylamide hydrogel (PAAG) was widely used for injection augmentation mammoplasty in Eastern Europe and China although uncommon in the western countries. However, the safety of this procedure remained controversial. Herein, we report a 30-year-old woman with a history of augmentation mammoplasty by PAAG injection developed galactoceles during her pregnancy.

T2-weighted and T1-weighted dynamic superparamagnetic iron oxide (ferucarbotran) enhanced MRI of hepatocellular carcinoma and hyperplastic nodules.

Background/purpose: Iron oxide contrast medium (ferucarbotran) shortens both T1 and T2 relaxation time. We used the T2- and the T1-weighted dynamic ferucarbotran-enhanced magnetic resonance (MR) imaging to predict the histologic grade of hepatocellular carcinoma (HCC) and to distinguish HCC from hyperplastic nodules.

Methods: Forty-three patients with 48 representative hepatic lesions (13 well differentiated HCC, 19 moderately differentiated HCC, 4 poorly differentiated HCC, 12 hyperplastic nodules) were included in the study.

Enhancement characteristics of ultrasmall superparamagnetic iron oxide particle within the prostate gland in patients with primary prostate cancer.

Objective: To analyze the enhancement of the prostate using ultrasmall superparamagnetic iron oxide (USPIO)-enhanced magnetic resonance imaging in patients with prostate cancer.

Methods: Sixty patients were enrolled. The signal-to-noise ratios (SNRs) of the central and peripheral zones (CZ and PZ, respectively) of the prostate were evaluated on T2- and T2*-weighted magnetic resonance imaging before and 24 hours after USPIO-enhanced MRI.

Differentiation of soft tissue benign and malignant peripheral nerve sheath tumors with magnetic resonance imaging.

Purpose: The objective of this study was to differentiate the magnetic resonance (MR) imaging appearance of benign peripheral nerve sheath tumors (PNSTs) from that of malignant PNSTs.

Materials And Methods: Twenty-six patients who underwent MR imaging and had a histologic diagnosis of benign (schwannoma, n=16; neurofibroma, n=1) or malignant (n=9) PNST were retrospectively reviewed. The size, location, shape, margin, and signal intensities of the tumors on precontrast and gadolinium-enhanced MR imaging were analyzed.

Value of automated coronal reformations from 64-section multidetector row computerized tomography in the diagnosis of urinary stone disease.

Purpose: We determined the value of automated coronal reformation using 64-detector computerized tomography for the detection of urinary stones.

Materials And Methods: A total of 72 patients underwent unenhanced 64-detector computerized tomography to diagnose urinary stones. Two radiologists independently reviewed coronal reformations and axial images at separate reading sessions.

Magnetic resonance imaging appearance of well-differentiated hepatocellular carcinoma.

Objective: To investigate the magnetic resonance imaging (MRI) features of well-differentiated hepatocellular carcinoma (HCC).

Methods: We reviewed the MRI of 32 patients with 33 pathologically confirmed well-differentiated HCC. The MRI protocol included T2-weighted imaging with and without fat saturation, dual-phase T1-weighted imaging, and gadolinium-enhanced dynamic study.

Peritumoral fat-spared area is well correlated with the presence of temporal peritumoral enhancement in hepatic hemangioma in fatty liver.

Purpose: To assess the relationship between temporal peritumoral enhancement and peritumoral focal fat sparing adjacent to hepatic hemangiomas.

Materials And Methods: On the basis of MRI and sonographic imaging follow-up, 51 hepatic hemangiomas were identified in 37 patients, who had both hepatic hemangiomas and focal fat-sparing areas in fatty liver. Among them, 36 tumors were associated with peritumoral focal fat spares.

MRI of angiomatoid fibrous histiocytoma.

Angiomatoid fibrous histiocytoma is a rare soft tissue tumor of low-grade malignancy. We present the case of a 32-year-old man who complained of soreness and numbness over his left arm and hand over the previous 2 months and of having a palpable mass over his left upper back for 4 years. Magnetic resonance imaging (MRI) showed an intramuscular soft tissue mass in the left scapular region.

Temporal peritumoral enhancement of hepatic cavernous hemangioma: findings at multiphase dynamic magnetic resonance imaging.

Objective: To evaluate the occurrence rate of temporal peritumoral enhancement associated with hepatic cavernous hemangiomas and to correlate that with the speed of intratumoral contrast enhancement and tumor volume.

Methods: Dynamic magnetic resonance imaging (MRI) of 69 consecutive patients with 136 hemangiomas was reviewed for peritumoral enhancement. Tumor volume was estimated by the largest diameter on T2-weighted images.