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Spotters Set 62 – Radiology Board Review Cases 2

Radiology Board Review Cases

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  1. Pancreatic Neuroendocrine Tumor (NET) – Insulinoma:
    • Small arterially enhancing lesion in the pancreatic body.
    • Pancreatic adenocarcinomas are hypoenhancing as compared to the normal parenchyma.
    • Associated with Whipple’s triad: Symptoms of hypoglycemia, hypoglycemia, and relief of symptoms following ingestion of glucose.
  2. Midgut Volvulus. Associated signs: barber pole sign/corkscrew sign on fluoroscopy and clockwise whirlpool sign on ultrasound and CT.
  3. Brainstem Glioma. Diffuse expansile heterogenous lesion involving the brain stem.
  4. Right cerebellopontine angle epidermoid cyst – How do you differentiate this from an arachnoid cyst? Let me know in the comments below
  5. Aneurysmal Bone Cyst of the Calcaneum: Expansile lesion with fluid levels. How to distinguish ABC from GCT?
  6. Dermoid cyst of the ovary / Mature cystic teratoma: Signs associated with dermoid on ultrasound
  7. Ovarian Fibroma
  8. Scoliosis with multiple butterfly vertebra, hemivertebrae with type 1 split cord malformation (diastematomyelia).
  9. Arnold Chiari malformation type II
    • Chiari I malformation:
      • Most common Chiari malformation
      • 50% asymptomatic
      • Caudal tonsilar ectopia ≥ 5mm of cerebellar tonsils, may or may not be associated with holocord hydrosyringomyelia.
    • Chiari II malformation:
      • The most common cause of congenital hydrocephalus
      • Small posterior fossa
      • Cerebellar tonsils extend far down into the spinal canal, accompanied by an elongated fourth ventricle with lumbar spina bifida and a meningomyelocele (almost always).
      • Cervicomedullary “kink,” medullary “spur”.
    • Chiari III malformation:
      • Small posterior fossa with a caudally displaced brainstem and variable herniation of meninges/posterior fossa contents through a low occipital or upper cervical bony defect.
    • Chiari Variants:
      • Chiari 0: Hydrosyringomyelia and foramen magnum (FM) “crowding.” without tonsillar ectopia.
      • Chiari 1.5: “Complex Chiari” malformation in which cerebellar tonsillar herniation is complicated by other abnormalities. No myelomeningocele.
      • Chiari 4: Primary cerebellar agenesis / severe cerebellar hypoplasia is the preferred term.
  10. Gout : First MTP joint is most commonly affected.

How many did you get correct? Let me know in the comments!

Previous set of Cases: Spotters Set 61 – Radiology Board Review Cases

Further reading and references:

Recommended books for spotters:

Aunt-Minnie's Atlas of Imaging and Specific Diagnosis Radiology Book
Aunt Minnie’s Atlas
RadCases Radiology case based book

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These learning radiology cases have been contributed by Dr. Anuj Aggarwal. Dr. Aggarwal is pursuing his MD in radiology at Vardhman Mahavir Medical College and Safdarjung Hospital, Delhi. You can check out the previous cases uploaded by him (and other authors) on our contributing authors’ page.

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Last Updated on February 16, 2021

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About the Author

Dr. Amar Udare, MD, DNB

Dr Amar UdareDr. Amar Udare is a board-certified radiologist. He is currently working as a fellow radiologist at McMaster University, Canada. He has a passion for teaching (#FOAMrad and #FOAMed) and has been a semi-finalist for the 2018 and 2020 Aunt-Minnie Most effective Radiology Educator Awards. He has authored multiple peer-reviewed publications which can be accessed on PubMed and Google Scholar.

Spotters Set 62 – Radiology Board Review Cases 2

by Dr. Amar Udare, MD time to read: 2 min

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