Beaded ribs with epiphysial swelling is a feature of:
Rickets is characterized by the continued formation of the collagen matrix of bone, but incomplete mineralization results in soft, pliable bones. 
In osteomalacia, demineralization of pre-existing bones increases their susceptibility to fracture. Insufficient exposure to daylight and/or deficiencies in vitamin D consumption occur predominantly in infants and the elderly. 
Vitamin D deficiency is more common in the northern latitudes, because less vitamin D synthesis occurs in the skin as a result of reduced exposure to ultraviolet light. 
Loss-of-function mutations in the vitamin D receptor result in hereditary vitamin D-deficient rickets.
Vitamin D deficient rickets leads to epiphyseal swelling with beaded ribs known as Rachitic rosary.

Key Concept:
Vitamin D deficient rickets leads to epiphyseal swelling with beaded ribs known as Rachitic rosary.
Ref: Lippincott’s illustrated reviews for biochemistry, 7th edition.
Vit D deficiency
Vit A deficiency
Vit C deficiency
Vit K deficency