The prominent knobs of bone at the costochondral joints of rickets patients are known as a rachitic rosary or beading of the ribs. The knobs create the appearance of large beads under the skin of the rib cage, hence the name by analogy with the beads of a Catholic Christian rosary.
|Rachitic rosary on chest radiograph|
- Rickets : Nodularity at costochondral junction (rachitic rosary).
- Scurvy : More angular costochondral junction with a sharper step-off (scorbutic rosary) and depressed sternum.
Rachitic rosary is due to a deficiency of calcium resulting in lack of mineralization and an overgrowth of costochondral joint cartilage. The calcium deficiency may be caused by rickets or other causes of calcium deficiency such as hypoparathyroidism.
- John Little Morris; W.F. Waugh; W.C. Abbott (1900). "Rickets". The Alkaloidal Clinic. Clinic Publishing Company. 7 (1).
The earliest bone lesion that we find in incipient rickets is the beading of the ribs, the so-called rachitic rosary. This is due to an enlargement of the osteo chondric articulations, and hence its name because of fancied resemblance to the rosary used by the Catholic worshiper.
- "Rachitic rosary". TheFreeDictionary. Retrieved 12 August 2013.
- von Schulthess, Gustav K.; Ch.L. Zollikofer, eds. (2005). Musculoskeletal diseases : diagnostic imaging and interventional techniques. 37th International Diagnostic Course in Davos (IDKD) Davos, April 2-8, 2005 : including the Pediatric Satellite course "Kangaroo" Davos, April 2-3, 2005. Milan: Springer. ISBN 8847003180.
- Ebel, Klaus-Dietrich; et al., eds. (1999). Differential diagnosis in pediatric radiology. Stuttgart: Thieme. ISBN 9783131081315.
- Ebel, Klaus-Dietrich; et al., eds. (1999). Differential diagnosis in pediatric radiology. Stuttgart: Thieme. ISBN 3131081317.