Osteogenesis imperfecta

Brittle bone disease
Marble bones
Osteopetrosis
Adair-Dighton syndrome
Eddowe's syndrome
Fragilitas ossium
Lobstein's disease
Osteopsathyrosis
van der Hoeve's syndrome
Albers-Schönberg disease
Albright-McCune-Sternberg syndrome
Ellis-van Creveld syndrome
Chondorectodermal dysplasia
Osteopoikilosis

Nature

Osteopetrosis is a condition present at birth (congenital) in which the bones are overly dense. This results from an imbalance between the formation of bone and the breakdown of the bone. There are three types of osteopetrosis of varying severity. Symptoms can include fractures, frequent infections, blindness, deafness, and strokes.