The term "osteomalacia" has historically been used to describe failure of newly formed osteoid to mineralize. However, when describing the above lesion, the term "increased osteoid" is preferred over "osteomalacia," since the latter denotes a gross morphologic change of bone (softening).
Increased osteoid should not be used as a diagnosis for delayed or inadequate mineralization of physeal or epiphyseal cartilage when occurring at the growth plates. This is more appropriately recorded as physeal dysplasia (rickets) and differs from increased osteoid by the presence of thickened cartilaginous growth plates and retained cartilage cores within the metaphysis (see ) rather than excess osteoid.
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