Ultrasound is the most commonly used modality in evaluating the thyroid gland and in classifying thyroid nodules. We present a three-case series of intrathyroidal ectopic thymus. Two of these cases were initially classified as high grade (TI-RADS 4) thyroid nodules and subsequently underwent fine needle aspiration (FNA). The third was recognized initially as intrathyroidal ectopic thymus, avoiding the need for FNA and followed conservatively. Ectopic thymic tissue can occur anywhere along the embryologic path of descent from the 3rd branchial pouch to the anterior mediastinum. Embryology of the thymus and common locations of ectopic thymic tissue will be reviewed. We will also review and illustrate ultrasound imaging characteristics of normal thymic tissue in the mediastinum as well as in ectopic locations, focusing primarily on the thyroid gland. We hope that the radiologist will consider the diagnosis of intrathyroidal ectopic thymus when evaluating thyroid nodules by ultrasound, differentiating them from other thyroid lesions and avoiding the need for FNA. Read More

Meeting name: SPR 2026 Annual Meeting , 2026

Authors: Tamer Nicole, Dahl Amy

Keywords: Thymic Rest, Ultrasound, Thymus

The purpose of this educational exhibit is to educate the radiologist regarding the fetal and postnatal imaging findings of Zika Virus (ZikV) in order to include congenital ZikV in the differential diagnosis when the maternal history and geography are compatible. We present a patient who emigrated from Central America during her third trimester of pregnancy with maternal ZikV. Read More

Meeting name: SPR 2017 Annual Meeting & Categorical Course , 2017

Authors: Wermers Joshua, Fickenscher Kristin, Robinson Amie, Dahl Amy

Keywords: Zika Virus, MRI, Ultrasound

Inflammatory bowel disease (IBD), including Crohn disease, is a cause of significant morbidity in the pediatric population. Perirectal disease is a Crohn related complication affecting as many as 62% of children. Magnetic resonance enterography (MRE) is being increasingly utilized in characterizing the extent of IBD. Dedicated perirectal disease imaging, such as a T2 SPACE, requires an additional 10-15 minutes of imaging time on an already time constrained modality. The goal of our study was to determine the best imaging protocol for patients without clinically suspicious perirectal disease based on the incidence in this population. Read More

Meeting name: SPR 2018 Annual Meeting & Postgraduate Course , 2018

Authors: Reddy Nidhi, Chan Sherwin, Robinson Amie, Mardis Neil, Dahl Amy, Fickenscher Kristin

Keywords: Perirectal Disease Imaging, MR Enterography, Pediatric MRI