Confidence votes 11. According to Wikipedia, the width of the Atlantic Ocean at its narrowest point is 2,848 kilometers (1,770 mi) between Brazil and Sierra Leone.
What causes PNH? It is not fully understood why people develop PNH. Inside the bone marrow, blood cells are made by stem cells (the seed cells of the marrow). PNH occurs due to a change (or mutation) in a gene in one of the stem cells in the bone marrow. This mutation happens in a gene called PIG-A and the cells made by this stem cell lack certain proteins on their surface making them âweakerâ than normal blood cells.
Primary hyperparathyroidism occurs when your parathyroid glands produce too much PTH. This can happen if you have an adenomaâor non-cancerous tumorâon one of these glands. These tumors are the most common cause of primary hyperparathyroidism. In other cases, enlargement of at least two of your parathyroid glands can lead to this condition. Doctors often do not understand what causes this enlargement. In rare cases, parathyroid cancer may be the culprit. These tumors can cause hyperparathyroidism.