SAR Resident and Fellow Section

Please join us in welcoming the new members of the @SAR_RFS Executive Committee! We are excited to have them on board and look forward to their leadership and contributions in the year ahead. #radres #radiology

We’re proud to launch the inaugural Advanced Oncologic Imaging Fellowship in the Dept of Radiology at Moffitt Cancer Center, Tampa FL. Train in the nation’s 1st dedicated AI in Oncologic Imaging module🚀Starting July 2026. @MoffittNews @ml4onco @rchima86 @Gxrasool 🔗 in comments

53-year-old male patient presenting for workup of incidental finding detected by lumbar spine MRI. No symptoms. Diagnosis? Next step? @BrighamRad @FOAMrad @SAR_RFS @futureradres @ARRS_Radiology @Abdominal_Rad @CBRadiologia #MedEd

I talk about 'rare' all the time but this is NEXT LEVEL rare... Throrotrast (colloidal suspension of radioactive thorium-232 dioxide) has been discontinued since the early 1950s!... Discontinuation was driven by recognition that Thorotrast, once injected, was retained permanently in the reticuloendothelial system (liver, spleen, bone marrow, lymph nodes)... with a biological half-life of several hundred years, resulting in lifelong chronic alpha-particle irradiation... German Thorotrast Study: median life expectancy was shortened by 14 years, liver cancer standardized mortality ratio exceeding 12,000–16,000, excess cancer risk persisting for over 50 years after injection... scary stuff!

Not so rare! Several case reports out there, including this: rb.org.br/imageBank/pdf/…

Super duper rare but a classic! Erdheim-Chester Disease! Non-Langerhans histiocytosis with a constellation of findings you won’t forget once you’ve seen them: 🦴 Symmetric sclerosis of long bone diaphyses/metadiaphyses (sparing epiphyses) 🫘 Bilateral renal soft tissue infiltration → “hairy kidneys” on CT 🫀 Soft tissue encasement of the aorta → “coated aorta” sign 🧠 CNS involvement — pituitary stalk thickening, cerebellar/brainstem lesions 🔶 Orbital infiltration causing proptosis ⚡ Key associations: → BRAF V600E mutation in ~50% → Diabetes insipidus is a common presenting symptom → 18F-FDG PET/CT is invaluable for staging & treatment response 📸 When you see bilateral perirenal soft tissue + long bone sclerosis on a CT — think ECD! x.com/ctisus/status/…

What Bosniak version 2019 category should you assign a homogeneous renal lesion with density of 25 HU detected on portal venous phase CT? @BrighamRad @SABImaging @SocietyAbdRad @RadiologyACR @medalityhq @harvardmed @JUrology

Woooaaaahh that’s an often mentioned but rarely seen diagnosis in the spleen, pretty rare, often multiple, with malignant potential, needs splenectomy!

A classic abdominal radiologist’s favorite! Splenic SANT! A ‘sine qua non’ in the differential diagnosis of splenic focal lesions! 😉😁

Answer: Perirenal Extramedullary Hematopoiesis Learn more: pubs.rsna.org/doi/10.1148/rg… pubs.rsna.org/doi/10.1148/rg… #CookyBites #263 #RGphx @cookyscan1 @RadioGraphics

66 M with with essential thrombocytosis. What is the diagnosis? We’ll post the answer in 24h. Share companion cases with us using #CookyBites #263. We will RT the best cases! #RGphx @cookyscan1 @RadioGraphics

Answer: Endometriosis of Canal of Nuck Learn more: pubs.rsna.org/doi/10.1148/rg… pubs.rsna.org/doi/10.1148/rg… #CookyBites #262 #RGphx@cookyscan1 @RadioGraphics

Case #15 in 2026 65 year old woman Incidental finding in an oncologic follow-up study Diagnosis in the reply #MedEd #rad #radiology #abdrad #abdomen #imaging #urology #gyn

Bosniak Cysts Learn more: ctisus.com/learning/featu…

74-year-old female patient, asymptomatic. Incidental liver lesion, >1cm, US nondiagnostic per request. Diagnosis? Next step?

Have you ever heard of this or made this diagnosis? Not so rare, avoid misdiagnosing this entity as an adenomyosis or degenerated fibroid!

38-year-old male patient presenting with incidental large liver mass... diagnosis? Next step? @BrighamRad @FOAMrad @SAR_RFS @futureradres @ARRS_Radiology @Abdominal_Rad @CBRadiologia #MedEd

43-year-old male with history of testicular cancer status post right orchiectomy and lymph node dissection. What is this retroperitoneal mass? Diagnosis? Next step? @BrighamRad @FOAMrad @SAR_RFS @futureradres @ARRS_Radiology @Abdominal_Rad @CBRadiologia #MedEd

44-year-old male with mild right upper quadrant pain and borderline leukocytosis presents to the ER and gets the classic double radio-whammy... Diagnosis? What would you do next? @BrighamRad @FOAMrad @SAR_RFS @futureradres @ARRS_Radiology @Abdominal_Rad @CBRadiologia #MedEd

This is at tough one... can you get it? 48-year-old female patient presenting to the ER with acute pelvic pain... diagnosis? Next step? @BrighamRad @FOAMrad @SAR_RFS @futureradres @ARRS_Radiology @Abdominal_Rad @CBRadiologia #MedEd

Congratulations to these Gold Medalists! #SAR26