Pelvic digit

Pelvic digit, also known as a pelvic ribpelvic finger or 11th finger, is a rare congenital abnormality where there is development of bony tissue in the soft tissue pelvis and less commonly in the abdomen. They can be associated with one or more pseudo-articulation. They are usually unilateral.

Pathogenesis is unknown but is thought to occur during early embryogenesis from non-fusion of the vertebral column and the superior part of the coccyx and subsequent independent development of the intervening cartilaginous segment 4

It is a benign entity and if incidentally discovered no further investigation is required. 

General imaging differential considerations include:

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Article information

rID: 10952
Section: Gamuts
Tag: stub
Synonyms or Alternate Spellings:
  • Pelvic digits
  • Pelvic rib
  • Pelvic ribs
  • 11th finger
  • Eleventh finger

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Cases and figures

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    Case 1: on right
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     Case 2: more than 1 digit
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    Case 3
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    Case 4
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    Case 5: anterior abdominal wall
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