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Case of the Week 457


What is the most likely diagnosis?

  • 42 year-old with lump on head



Axial CT Scans of Head - Bone Window

  1. Multiple Myeloma
  2. Osteoma
  3. Fibrous Dysplasia
  4. Cephalohematoma
  5. Dermoid Cyst of Skull

Additional Image - Scout Image of Skull from CT Scan of Head

 

Additional Images

 

Scout Image of Skull from CT Scan of Head


Answer:

.


5. Dermoid Cyst of Skull

.

.

More (Click Discussion Tab)

 

 

Dermoid Cyst of the Skull


General Considerations

  • Benign, slow-growing tumors of the skull (“cyst” and “tumor” are used interchangeably)
  • Believed to occur secondary to aberrant epidermal or dermal inclusion in the calvarium
  • Although rare, it is still , along with Langerhans cell histiocytosis, one of the more common lesions in the pediatric skull

 

 

MORE . . .

 


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is an award-winning educational website aimed primarily at medical students and radiology residents-in-training, containing  lectures, handouts, images, Cases of the Week, archives of cases, quizzes, flashcards of differential diagnoses and “most commons” lists, primarily in the areas of chest, GI, GU cardiac, bone and neuroradiology.