What are cribra orbitalia and porotic hyperostosis, and what conditions are they associated with?

• A. Porous lesions on the orbital roofs/cranial bones associated with anemia, nutritional deficiency, or chronic stress.
• B. Bone fractures due to trauma.
• C. Calcified cartilage at joint surfaces.
• D. Dentition anomalies in adolescence.

Answer: (A)

Cribra orbitalia and porotic hyperostosis are skull changes produced by the body increasing bone marrow activity in response to chronic hematopoietic stress, typically from anemia and nutritional deficiency. Cribra orbitalia refers to porous patches on the roofs of the eye sockets, while porotic hyperostosis describes porous thickening of the cranial bones, especially in the vault. The porous patches arise as the diploë and outer/inner tables become more porous due to marrow expansion as the body tries to manufacture more red blood cells. These lesions are commonly associated with iron-deficiency anemia and long-term nutritional stress, and they can also relate to chronic infections that cause anemia. They reflect a history of health stress over time rather than an acute injury. They are not trauma fractures, not calcified cartilage at joint surfaces, and not dentition anomalies, which is why the described porous lesions linked to anemia and nutritional stress best capture what cribra orbitalia and porotic hyperostosis signify.