Submental Ectopic Thyroid in a Patient with an Orthotopic Thyroid Gland.

Ectopic thyroid is a rare clinical disease, with the majority of the patient presented with hypo-functional thyroid tissue and absence of orthotopic thyroid gland. During embryogenesis, the thyroid gland descends from the foramen cecum to its normal position located below the larynx and hyoid bone, anterior to the 2, 3, and 4 tracheal cartilaginous rings. Any defect that occurs during this period will result in ectopic thyroid.

Unenhanced multidetector computed tomography findings in acute central pulmonary embolism.

Background: Computed tomography pulmonary angiography (CTPA) is the gold standard for the diagnosis of pulmonary embolism (PE). However, contrast is contraindicated in some patients. The purpose of this study was to determine the diagnostic accuracy of unenhanced multidetector CT (MDCT) for diagnosis of central PE using CTPA as the gold standard.

Gadoxetic acid-enhanced magnetic resonance imaging can predict the pathologic stage of solitary hepatocellular carcinoma.

Background: Although important for determining long-term outcome, pathologic stage of hepatocellular carcinoma (HCC) is difficult to predict before surgery. Current state-of-the-art magnetic resonance imaging (MRI) using gadoxetic acid provides many imaging features that could potentially be used to classify single HCC as pT1 or pT2.

Aim: To determine which gadoxetic acid-enhanced MRI (EOB-MRI) findings predict pathologic stage T2 in patients with solitary HCC (cT1).

A comparison of pyelography and various reconstructions of multidetector helical computed tomography urography images for diagnosing urinary obstruction.

Radiologists and urologists require practical and helpful image reconstructions for diagnosing urinary obstruction. We performed different types of imaging and reconstruction, then used a self-designed urinary obstruction-specific questionnaire to evaluate the diagnostic outcome of them. Our results suggested that two-dimensional (2D) axial computed tomography (CT) is clinically superior to retrograde pyelography or antegrade pyelography, and to other modes of image reconstruction that are often used for diagnosing urinary obstruction.

An unusual appearance of renal epithelioid angiomyolipoma.

Epithelioid angiomyolipoma is a recently described rare variant of renal angiomyolipoma. It can occur in patients with or without tuberous sclerosis. We report the imaging findings of a case of epithelioid angiomyolipoma that showed the presence of fatty tissue undifferentiated from the typical angiomyolipoma at the beginning.

CT-guided transthoracic cutting needle biopsy of intrathoracic lesions: comparison between coaxial and single needle technique.

Purpose: To evaluate the complication rates and diagnostic accuracy of two different CT-guided transthoracic cutting needle biopsy techniques: coaxial method and single needle method.

Methods: This study involved 198 consecutive subjects with 198 intrathoracic lesions. The first 98 consecutive subjects received a single needle cutting technique and the next 100 consecutive subjects received a coaxial technique.

Computed tomography appearance of ovarian fibrothecomas with and without torsion.

Background: Fibrothecomas are the most common solid ovarian tumors and may undergo torsion. Early diagnosis of these tumors is important in order to allow prompt surgical treatment.

Purpose: To describe the features of ovarian fibrothecoma on computed tomography (CT) and to determine the possibility of detecting tumor torsion in this kind of tumor.

Adjusting mammography--audit recommendations in a lower-incidence Taiwanese population.

Rationale And Objectives: Medical auditing of screening mammography is crucial to improving the quality of breast cancer care. Audit methodology and recommendations are well documented in the ACR's Breast Imaging Reporting and Data System (BI-RADS). However, when screening a population with a lower incidence rate of breast cancer, performance recommendations should be adjusted for a better fit.

Sonographic appearance of angiolymphoid hyperplasia with eosinophilia in the upper arm.

Angiolymphoid hyperplasia with eosinophilia is an uncommon benign condition characterized by cutaneous nodules involving primarily the head and neck regions of young adults. We report thecase of a 49-year-old woman with such a lesion in the arm. Sonographically, the lesion exhibited a hypoechoic rim and an echogenic central portion.

Clinical significance of poor CT enhancement of the thickened small-bowel wall in patients with acute abdominal pain.

Objective: Our purpose was to compare clinical outcomes in patients with acute abdominal pain and inner-layer enhancement of a thickened small-bowel wall, as shown on CT, with outcomes in similar patients without such enhancement.

Materials And Methods: We retrospectively studied outcomes in 126 patients with acute abdominal pain and small-bowel wall thickening on CT: 84 with inner-layer enhancement and 42 without this enhancement. We compared the surgical, small-bowel resection, small-bowel necrosis, and mortality rates between the two groups using the chi-square test.

Malignant mesothelioma of the tunica vaginalis testis: unusual sonographic appearance.

Malignant mesothelioma of the tunica vaginalis testis is a rare and aggressive neoplasm. It is similar to malignant mesothelioma of the peritoneum, usually associated with asbestos exposure. We present an unusual case in which the tumor was a mix of a hypoechoic solid nodule and a cystic component with low-level internal echoes.

Leiomyoma arising from the tunica albuginea of the testis: sonographic findings.

Leiomyomas are benign neoplasms that may arise from any structure or organ containing smooth muscle. The majority of genitourinary leimyomas are found in the renal capsule, but this tumor has also been reported in the epididymis, spermatic cord, and tunica albuginea. Sonography is the imaging modality of choice for evaluating intrascrotal pathology, but the sonographic appearance of leiomyomas arising from the tunica albuginea have rarely been reported.

Prenatal diagnosis of congenital mesoblastic nephroma in mid-second trimester by sonography and magnetic resonance imaging.

Although congenital mesoblastic nephroma (CMN) is a rare benign congenital renal tumor, it is the most common solid renal tumor in the newborn period. The most common presentation of congenital mesoblastic nephroma is polyhydramnios, and only one case with prenatal fetal hydrops has been previously reported. Prenatal diagnosis of CMN has previously been made on the basis of the findings of sonography in the third trimester, and magnetic resonance imaging (MRI)-based diagnosis has been reported recently.