Yung-Hui Lin

Solitary fibrous tumor of the breast: A case report and review of the literature

Solitary fibrous tumor (SFT) is an uncommon neoplasm of mesenchymal origin, which can be benign or malignant. Most SFTs develop from the pleura, but they can also be found in other sites. There are only few reports of SFT occurring in the breast. We herein report such a rare case. Sonography demonstrated an ovoid lesion mimicking a fibroadenoma, whereas color Doppler imaging showed marked internal vascularity. A brief literature review on imaging features of SFTs is added.

Ultrasound‐Guided Prolotherapy for Acromial Enthesopathy and Acromioclavicular Joint Arthropathy: A Single‐Arm Prospective Study

Prolotherapy is an injection‐based complementary treatment for various musculoskeletal diseases. The aim of this study was to evaluate the therapeutic efficacy of ultrasound‐guided prolotherapy in the treatment of acromial enthesopathy and acromioclavicular joint arthropathy.

Algorithmic approaches to the diagnosis of gallbladder intraluminal lesions on ultrasonography

Ultrasound is a frequently used diagnostic tool for gallbladder diseases. Polypoid lesions are commonly depicted at routine abdominal ultrasonography (US). The characteristics of these lesions vary. Since most early malignant tumors in the gallbladder are asymptomatic, differentiation between malignancy and benignity is crucial. Knowledge of gallbladder polypoid lesions is important so that they can be appropriately included in the differential diagnosis in patients presenting with intra-gallbladder nodules on US. This article summarizes the algorithmic approach to the diagnosis of these lesions and our recent experience with contrast-enhanced US. The clinical and imaging features of gallbladder polypoid lesions are reviewed.

Shoulder joint synovial chondromatosis presenting as multiple axillary masses: A case report

Synovial chondromatosis is a rare, benign, proliferative cartilaginous lesion arising from the synovial tissue, tenosynovium, or bursal lining. We describe the case of a patient who initially presented with multiple axillary masses. Breast ultrasound (US) was requested due to the concern of a breast tumor with axillary lymph node metastases. US study was helpful and provided adequate information to suggest the diagnosis.

The use of fine needle aspiration and trends in incidence of thyroid cancer in Taiwan

Background: Thyroid cancer is the most prevalent endocrine malignancy, and the incidence of thyroid cancer has increased worldwide. Fine needle aspiration (FNA) for cytology of thyroid tissue is used for differentiating thyroid cancers from benign thyroid nodules. Overuse of FNA may detect subclinical thyroid cancer and play a role in the increased incidence of thyroid cancer. The aim of this study was to evaluate trends in incidence of thyroid cancer and the use of palpation‐guided FNA thyroid and ultrasound‐guided FNA thyroid in Taiwan. Methods: By retrospectively analyzing a cohort dataset of one million people randomly sample to represent as NHI beneficiaries of Taiwan National Health Insurance Research Database from 2004 to 2010, patients who received palpation‐guided and ultrasound‐guided thyroid FNA were identified. Individuals who were diagnosed as having thyroid cancer were determined. Age‐standardized, yearly rates of palpation‐guided thyroid FNA and ultrasound‐guided FNA, and age‐standardized, yearly incidence rates of thyroid cancer were calculated. Results: In the study period, a total of 541 patients were newly diagnosed with thyroid cancer, 14,240 individuals received palpation‐guided thyroid FNA, and 3823 individuals underwent ultrasound‐guided thyroid FNA. There was a 94.8% increase in the age‐standardized annual incidence rate of thyroid cancer. The age‐standardized rates of palpation‐guided thyroid FNA and ultrasound‐guided thyroid FNA increased by 10.9% and 349.3%, respectively. Conclusion: FNA for cytology of thyroid tissue, especially ultrasound‐guided FNA, was conducted by physicians more frequently in Taiwan. Increased use of FNA, especially ultrasound‐guided FNA for cytology of thyroid tissue, may attribute to the increased incidence of thyroid cancer in Taiwan.

Epidermoid cyst of the testis: An atypical sonographic appearance

Epidermoid cysts are rare. They represent the most common benign tumor of the testis. The sonographic appearances of testicular epidermoid cysts usually include avascular, mostly lamellated, heterogeneous internal echotexture, with hypoechoic and hyperechoic concentric rings, accounting for the typical onion‐ring appearance. On MRI, epidermoid cysts show a low‐signal‐intensity center, with internal concentric rings of alternating high‐ and low‐signal intensity on T2‐weighted images, which correlates with the onion‐ring appearance. We report a patient with testicular epidermoid cyst with atypical ultrasound and MRI appearances that led to the erroneous initial diagnosis of “burned‐out” tumor.