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Spotters Set 60 – Learning Radiology Cases 3

Learning Radiology Cases 3

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  1. Quadrigeminal plate lipoma.
  2. Scurvy. Following signs are associated with scurvy (Reference: Chapman & Nakielny’s Aids to Radiological Differential Diagnosis
    • Osteoporosis – Often the only sign in adults. 
    • Subperiosteal hemorrhage and resultant periosteal reaction. 
    • White line of Frenkel: Dense zone of provisional calcification in the metaphysis
    • Wimberger ring sign: Reduced epiphyseal density with a pencil-thin cortex.
    • Trümmerfeld zone: lucent metaphyseal band underlying Frankel line
    • Pelkin spur: healing metaphyseal corner fractures causing cupping. 
    • Hemarthrosis. 
  3. Epidermoid cyst in the left medial temporal region with mass effect. A close differential always is an arachnoid cyst that will not show restricted diffusion and get COMPLETELY suppressed on FLAIR images. 
  4. Left iliac blade chondrosarcoma: Ring and arcs type calcification. 
  5. Duplication of the gall bladder (Read about Boyden’s classification). 
  6. Left parietal fibrous dysplasia.
  7. Left femoral parosteal osteosarcoma. Cauliflower like mass posterior to the distal femoral metaphysis with string sign/cleft sign separating it from it. Distinct from PERIosteal osteosarcoma which is more closely attached to the periosteum as the name suggests. 
  8. Craniopharyngioma. Remember the 90% rule of craniopharyngioma: 90 % calcify, 90% have cysts , 90% have solid enhancing components, 90 % are Adamantinomatous subtype. Clinical and imaging features of adamantinomatous and papillary craniopharyngioma. 
  9. Brodie’s abscess.
  10. Bilateral femoral looser’s zones/pseudofractures in osteomalacia. 

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 December 1, 2020

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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.

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Spotters Set 60 – Learning Radiology Cases 3

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

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