Mitochondria under the microscope. Microscopes have been crucial for our understanding of mitochondrial structure and function. Mitochondria are visible under the light microscope although little detail can be seen.Transmission electron microscopy (left) shows the complex internal membrane structure of mitochondria, and electron tomography (right) gives a three-dimensional view.itochondria under the microscope. Microscopes have been crucial for our understanding of mitochondrial structure and function. Mitochondria are visible under the light microscope although little detail can be seen.
Splenomegaly: Abnormal enlargement of the spleen. Splenomegaly is a sign of an underlying condition, such as severe liver disease, leukemia, or mononucleosis. Patients with splenomegaly should avoid activities that risk trauma to the abdomen, including contact sports, because of risk of bleeding from the injured spleen.
It is therefore not surprising that splenomegaly is associated with any disease process that involves abnormal red blood cells being destroyed in the spleen. Other common causes include congestion due to portal hypertension and infiltration by leukemias and lymphomas.