Created at 9:41 a.m. Aug, 02, 2026
Author:
momed
Type of change:
Updated content
Rationale for change
This card currently lists "Osteomalacia/rickets" as the pathology associated with Looser zones (pseudofractures). However, Looser zones are classically a radiographic finding of osteomalacia in adults, not rickets. Rickets is instead characterized by metaphyseal cupping, fraying, and widening of the growth plate.
Proposed answer: Osteomalacia (or "Osteomalacia [adult form of vitamin D deficiency]").
This distinction is also consistent with Boards & Beyond, which specifically associates Looser zones with osteomalacia.
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Photo credit: Gamache et al., CC BY 3.0, via Sage Journals

Photo credit: Gamache et al., CC BY 3.0, via Sage Journals
Lecture Notes
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Missed Questions
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Pathoma
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Boards and Beyond
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First Aid
Looser zones are radiolucent (dark) lines resembling bone fractures commonly seen on x-ray in osteomalacia and rickets



Sketchy



Watch Osteomalacia & Rickets



Watch Osteomalacia & Rickets
Sketchy 2
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Sketchy Extra
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Picmonic
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Pixorize
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Physeo
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Bootcamp
Watch associated Bootcamp video - Non-Rheumatologic Diseases: Osteomelacia/Rickets
Watch associated Bootcamp video - Vitamins: Vitamin D: Clinical Implications
Watch associated Bootcamp video - Vitamins: Vitamin D: Clinical Implications
OME
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Additional Resources
One by one
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