Autosomal Dominant Osteopetrosis Type II.

Area of Science:

• Genetics
• Bone Biology
• Clinical Medicine

Background:

• Osteopetrosis is a rare genetic bone disorder resulting from osteoclast dysfunction.
• Autosomal dominant osteopetrosis type II, caused by CLCN7 gene mutations, is the most common form.
• Its variable presentation suggests modifying genetic or environmental factors influencing disease penetrance.

Observation:

• A 46-year-old woman presented with 15 years of low back pain radiating to the left leg, exacerbated by activity.
• She had no history of trauma and no nocturnal pain.
• Radiological findings confirmed a diagnosis of autosomal dominant osteopetrosis.

Findings:

• The patient was diagnosed with osteopetrosis type II, an autosomal dominant condition.
• This case demonstrates osteopetrosis as a cause of chronic low back pain.
• Notably, the patient had no familial history or penetrance of the disease.

Implications:

• This case broadens the clinical spectrum of osteopetrosis type II.
• It underscores the importance of considering rare genetic disorders in the differential diagnosis of chronic back pain.
• Further research may elucidate the mechanisms behind variable penetrance in autosomal dominant osteopetrosis.