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Case of the Week 505



What is the most likely diagnosis?

  • 40 year-old from Africa with pain in little toe



Three views of right foot

  1. Fracture of 5th toe
  2. Osteomyelitis
  3. Ainhum
  4. Ewing's sarcoma
  5. Metastatic renal cell carcinoma

Additional Image-None

 

Additional Images

 

 

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Answer:

 

3. Ainhum

 

More (Click Discussion Tab)

 

 

Ainhum

General considerations

  • Rare disorder in the US but relatively common amongst black Africans
  • Autoamputation (dactylolysis) of a digit, usually the fifth toe
  • Frequently bilateral (60%)
  • Caused by a constricting fibrous band or groove
  • Affects predominantly black males in tropical areas
    • Has a familial association
    • May be associated with running barefoot
  • Rare before the age of 30 or after 50

 

MORE . . .

 


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LearningRadiology
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LearningRadiology.com
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.