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This version published online on September 5, 2006
Journal of Clinical Endocrinology & Metabolism, doi:10.1210/jc.2006-0023
A more recent version of this article appeared on November 1, 2006
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Submitted on January 5, 2006
Accepted on August 1, 2006

Controversy in Clinical Endocrinology: Reclassification of IGF-1 Production and Action Disorders

Arlan L. Rosenbloom* and Jaime Guevara-Aguirre

Arlan L. Rosenbloom, Division of Endocrinology, Department of Pediatrics, University of Florida College of Medicine, Gainesville Florida; Jaime Guevara-Aguirre, Instituto Endocrinologia, Metabolismo y Reproduccion, Quito Ecuador

Context: The need for the least ambiguous terminology for disorders affecting insulin-like growth factor-I (IGF-I) production and action has become necessary with identification of defects at various steps in the GH-IGF-I axis and the promotion of new indications for and modalities of growth therapy. No generally agreed-upon or consensus-derived classification exists.

Objective: To designate all disorders affecting IGF-I production and action by their discrete location, as is already done with the defects in pituitary differentiation factors, avoiding imprecise and ambiguous terminology.

Conclusions: We propose a pragmatic classification that is a precise listing of specific disorders sequentially following the GH-IGF-I axis, using their accepted designations, and the abolition of nonspecific or ambiguous terminology. This concept permits ready insertion of new discoveries.




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