Associated findings include microvascular infarcts and hemorrhages. White infarcts can become hemorrhagic with reperfusion. Complications can include cerebral infarcts, and cognitive deterioration. Similarly, it is limited in distinguishing bone infarcts from osteomyelitis in sickle cell anemia. However, sometimes the placenta involutes, and multiple infarcts and villous degeneration cause placental insufficiency syndrome. The facial nucleus itself can be affected by infarcts of the pontine arteries. Blockage of the lenticulostriate arteries causes lacunar infarcts. On rare occasion, infarcts in the hippocampus or thalamus are the cause of dementia. Infarcts of the centrum ovale can occur. Dressler's syndrome, a reaction following larger infarcts and a cause of pericarditis is also possible. This is especially the case for younger people with posterior circulation infarcts. Microthrombi are found in the blood vessels associated with the infarcts. Hypertensions and lacunar infarcts and lacunar stroke are related. The actual blood stream blockage/restriction site can be located far away from the infarcts. A sharp drop in blood pressure is the most frequent cause of watershed infarcts.