[…] dysplasia with increased bone density disorder characterized by severe osteoclast-poor osteopetrosis associated with hypogammaglobulinemia.
[orpha.net]
X-rays showed the thick bones with increased bone density [Figure 2]b.
[mjdrdypu.org]
Patients typically present infantile malignant osteopetrosis (manifesting with increased bone density, bone fractures, abnormal eye movements/visual loss, nystagmus), hematologic
[orpha.net]