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Spotters Set 51 – Radiology cases quiz 5

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Radiology cases quiz 5

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  1. Plunging Ranula: Mucus extravasation cyst involving a sublingual gland. Simple ranula is confined to the sublingual space while a plunging ranula extends into the submandibular space. The name is derived from the Latin word meaning little frog
  2. Cerebral arteriovenous malformation
    1. Sporadic usually. Syndromic in with hereditary hemorrhagic telangiectasia (HHT or Rendu- Osler-Weber disease) and Wyburn-Mason syndrome.
    2. 85% supratentorial.
    3. MicroAVMs have nidus less than 1cm and are associated with HHT.
    4. Annual risk of hemorrhage 3 %.
    5. Spletzler Martin AVM grading scale (1-5)
      1. Size : Small(<3cm)=1 .         Medium(3-6cm)=2      Large(>6cm)=3
      2. Location        • Noneloquent=0            • Eloquent=1
      3. Venous Drainage        • Superficial only=0          • Deep component=1
  3. Right superficial internal angular dermoid cyst
  4. Bucket handle tear of the medial meniscus with double PCL sign on sagittal images. Revise normal knee anatomy. 
  5. Aggressive fungal sinusitis
  6. Adenomyosis with posterior cervical fibroid. The junctional zone (endo-myometrial) is thickened and indistinct with tiny cystic areas. Criteria for thickening is 12mm. Also, look for deep pelvic endometriosis and ovarian endometriosis in all cases as these are part of the same spectrum.
  7. High grade right frontal glioblastoma multiforme (GBM)
  8. Anencephaly: “frog eye” appearance
  9. Enchondroma of the second metacarpal. Differential diagnosis for tumors of phalanges and metacarpals
    1. Enchondroma
    2. Aneurysmal Bone Cyst (ABC)
    3. Giant Cell Reparative Granuloma
    4. Giant Cell tumor (GCT)
    5. Periosteal Chondroma
    6. Osteochondroma
    7. Bizarre Parosteal Osteochondromatous Proliferation (Nora’s lesion)
    8. Osteoid Osteoma
    9. Malignant tumors are extremely rare.
  10. Posterior urethral valve.

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