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An autosomal dominant condition caused by mutation(s) in the COL1A1 gene encoding the collagen alpha-1(I) chain. This disease is an acute inflammatory condition of infancy that causes soft tissue swelling (mostly of chin/cheeks), bone thickening/widening (particularly of the mandible/clavicles/long bones), pain, and irritability. This disease generally resolves by the 3rd year of life, although some bony deformity may persist.
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