RadioGyan - Radiology Made Easy by Amar Udare MD

🫁 On the schematic above, three interpleural distances are measured on an erect chest radiograph. How can their sum estimate pneumothorax size—and which radiographic method is considered most accurate? Full guide to the free pneumothorax percentage calculator (Collins, Rhea and Light methods, ATS and BTS measurement definitions, interpleural-distance formula, small-pneumothorax criteria): https://radiogyan.com/pneumothorax-volume-calculator/

Few more 5 star reviews for RadioGyan Memberships. You can check out more reviews and subscribe on this page: https://radiogyan.com/upgrade-tg

Radiology Case of the Day 251 Diagnosis teaching points, OSCEs and MCQs : https://radiogyan.com/case-of-the-day/251/ #RGcases

Thank you for joining our channel and groups. I launched RadioGyan in 2017 to share practical radiology knowledge. My goal is to teach residents and radiologists the lessons that took me years to learn through experience. Since then, I’ve steadily developed this platform and shared cases and insights nearly every day. Best way to get latest updates is via our email newsletter: https://radiogyan.com/newsletter. This also includes a weekly radiology case. Here are a few useful links: Main channel: @radiogyandotcom Telegram group for case discussions: @radiogyan Channel for MCQs: @RadiologyQuizMCQ Channel for webinars: @radiologyconferences Channel for fellowship information: @radiologyfellowships Paid membership for case-based learning for radiology board exams: https://radiogyan.com/upgrade-tg Paid courses for residents starting residency: https://learn.radiogyan.com No spam. No requests for copyrighted material. No images containing patient information. Violations will result in an immediate ban. Happy learning! Dr. Amar Udare Founder https://radiogyan.com

🍎 A 64-year-old with a change in bowel habit, weight loss and iron-deficiency anaemia has a CT abdomen showing a short segment of sigmoid colon with circumferential wall thickening and abrupt, shouldered margins. What sign is this, and what does it most likely represent? Full breakdown of this classic colonic imaging sign (why it's named after fruit, annular carcinoma vs. benign mimics — diverticulitis, Crohn's disease, ischaemia, TB, endometriosis — and the CT features that separate malignant from benign strictures): https://radiogyan.com/articles/apple-core-sign-radiology-sign/

🦴 On the sagittal knee MRI above, a displaced meniscal fragment lies anterior and parallel to the PCL—what MRI pattern can create a mechanical block and knee locking after acute trauma? Full breakdown of bucket-handle tears (double PCL sign, flipped meniscus sign, absent bow tie sign, double ACL sign, intercondylar notch fragment): https://radiogyan.com/articles/bucket-handle-tear-radiology-sign/

🩻 On Doppler, a vein running alongside the femoral artery in the upper thigh is labelled “superficial femoral vein”—what should it actually be called, and why does the wording matter in DVT? Full breakdown of the “superficial femoral vein” misnomer (Terminologia Anatomica terminology, superficial vs deep venous system, femoral vein course, and implications for DVT reporting): https://radiogyan.com/articles/superficial-femoral-vein-misnomer/

🫀 What is the most common cause of a cardiophrenic angle lesion? Discover the mnemonic 'FAT PAD' to remember the key differentials. Full guide to cardiophrenic angle lesions (FAT PAD mnemonic, pericardial fat vs cyst, adenopathy vs aneurysm, diaphragmatic hernia): https://radiogyan.com/articles/cardiophrenic-angle-lesions-mnemonic/

Radiology Case of the Day 250 Diagnosis teaching points, OSCEs and MCQs : https://radiogyan.com/case-of-the-day/250/ #RGcases

🧠 A 45-year-old woman presents with a headache that's classically orthostatic — worse standing, better lying flat. MRI shows diffuse smooth dural enhancement, thin bilateral subdural collections, and brain sag with a shortened mamillopontine distance. What's the diagnosis? Full case review of spontaneous intracranial hypotension (SEEPS mnemonic for MRI findings, venous distension & pseudo-SAH signs, Schievink classification of CSF leaks, DDx vs Chiari I, first-line epidural blood patch treatment): https://radiogyan.com/cases/radiology-case-of-the-week-20/

Radiology Case of the Day 249 Diagnosis teaching points, OSCEs and MCQs : https://radiogyan.com/case-of-the-day/249/ #RGcases

🩹 A child comes in after facial trauma with a completely normal-looking, "quiet" eye — no bruising, no swelling. Why could this still be a surgical emergency? Full breakdown of orbital blow-out fractures (teardrop sign & muscle entrapment on CT, hydraulic vs buckling mechanism, the paediatric white-eyed blow-out fracture and oculocardiac reflex, adult vs paediatric classification, surgical vs medical management thresholds): https://radiogyan.com/cases/blow-out-fracture-of-the-orbit/

🦋 A thyroid nodule scores 7 points on ultrasound — TI-RADS 5, roughly 35% malignancy risk. But it measures only 4 mm. Does it still need an FNA? Full ACR TI-RADS guide (point-scoring chart across composition/echogenicity/shape/margin/echogenic foci, FNA & follow-up size thresholds by level, Bethesda System mapping after biopsy, reporting template + practice cases): https://radiogyan.com/articles/tirads/

Radiology Case of the Day 248 Diagnosis teaching points, OSCEs and MCQs : https://radiogyan.com/case-of-the-day/248/ #RGcases

Radiology Case of the Day 247 Diagnosis teaching points, OSCEs and MCQs : https://radiogyan.com/case-of-the-day/247/ #RGcases

🩻 A 64-year-old with a change in bowel habit, weight loss, and iron-deficiency anaemia has a short segment of sigmoid colon that's circumferentially narrowed with abrupt, overhanging margins on CT. What classic sign is this, and what diagnosis must be excluded first? Full breakdown of this classic colonic stricture sign (napkin ring pathophysiology, malignant vs. benign differentiating features, and the full differential — diverticulitis, Crohn disease, ischaemic colitis, lymphoma, TB, endometriosis): https://radiogyan.com/articles/apple-core-sign-radiology-sign/

🖥️ One of the most popular free macOS DICOM viewers only just gained native Apple Silicon support in 2026 — which one, and is it stable enough for daily use yet? Full 2026 comparison of DICOM viewers/PACS software (free vs paid picks for Windows/macOS/Linux, web & mobile viewers, MPR/3D VR feature table, what to check before clinical use): https://radiogyan.com/articles/dicom-viewers/

Radiology Case of the Day 246 Diagnosis teaching points, OSCEs and MCQs : https://radiogyan.com/case-of-the-day/246/ #RGcases

Radiology Case of the Day 229 Diagnosis teaching points, OSCEs and MCQs : https://radiogyan.com/articles/229/ This post is reshared for revision. #RGcases

Radiology Case of the Day 245 Diagnosis teaching points, OSCEs and MCQs : https://radiogyan.com/case-of-the-day/245/ #RGcases