Which of the following radiological signs are commonly associated with hyperparathyroidism?

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Disappearance of the lamina duraFibrous cystic bone lesions (osteitis fibrosa cystica)Skull bone erosion beneath the dura materAll of the aboveNone of the above

Explanation

Radiological findings in hyperparathyroidism include loss of the lamina dura, development of osteitis fibrosa cystica characterized by fibrous cystic lesions in bone, and erosions beneath the dura mater of the skull. Therefore, all these features are observed in this condition.