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Spotters Set 52 – Interesting Radiology cases 4

Last Updated on March 2, 2020

Interesting Radiology Cases

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  1. Cerebellar cavernoma
    • MR has a higher sensitivity than CT
    • Typical appearance of well-defined mass surrounded by a hemosiderin rim (“popcorn ball appearance”), best seen on GRE images
    • Typically do not exhibit mass effect unless there is recent bleeding
    • Can be associated with a venous angioma (Case 5 in this spotters set).
    • Cavernomas are classified using the Zabramski classification on MRI. Type I and II cavernomas are more prone to bleeding
      • Type I: Subacute hemorrhage
      • Type II: Differently aged hemorrhages – Most common.
      • TypeIII: Chronic hemorrhage
      • Type IV: Punctate microhemorrhages
  2. Right inguinal cystocele.
  3. Diffuse vertebral sclerosis in Renal osteodystrophy. Differentials: Metastasis, myelofibrosis, hypoparathyroidism, osteopetrosis.
  4. Bilateral paradoxical turbinates (Revise normal PNS anatomy)
  5. Left ovarian dermoid cyst AKA mature cystic teratoma with an echogenic Rokitansky nodule.
    • Derivates from at least two out of three germ cell layers are present, ectoderm predominates.
    • Signs associated with a dermoid cyst on USG:
      • Dermoid plug: Echogenic Rokitansky nodule with shadowing
      • Dermoid mesh: Linear echogenic strands with posterior acoustic shadowing from hair strands. Also gives rise to dot-dash pattern
      • Tip of the iceberg: Multiple interfaces obscure the posterior wall and major portion of the lesion, similar to an iceberg
      • Mobile spherules (rare)
      • Fat-fluid level. 
  6.  Myxopapillary ependymoma involving the conus medullaris
  7. Foramen magnum meningioma
  8. Spinal tuberculosis (Pott’s spine) with psoas abscess.
  9. Fungal ball
  10. Sublingual epidermoid cyst.

Further reading and references:

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About the author

Dr. Amar Udare, MD, DNB

Dr Amar Udare Dr. 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.

4 thoughts on “Spotters Set 52 – Interesting Radiology cases 4”

  1. Geetika Mittal

    Very helpful content

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Spotters Set 52 – Interesting Radiology cases 4

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

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