[Intrathyroidal parathyroid adenoma. Study of a case].

Intrathyroidal parathyroid adenoma is an infrequent lesion which can be explained by abnormalities during embryonic migration of the parathyroid glands. That abnormality can be a cause of failed cervical exploration for primary hyperparathyroidism. From a case report and literature data, we propose an exploration processes to search those ectopic parathyroid adenoma.