Optic nerve hypoplasia (ONH) is a congenital condition in which the optic nerve is underdeveloped (small). Many times, de Morsierâs Syndrome or septo-optic dysplasia (SOD) is associated with ONH, however, it is possible to have ONH without any additional issues like SOD.
Pyramidal neurons (pyramidal cells) are a type of neuron found in areas of the brain including cerebral cortex, the hippocampus, and in the amygdala.Pyramidal neurons are the primary excitation units of the mammalian prefrontal cortex and the corticospinal tract.eatures Edit. One of the main structural features of the pyramidal neuron is the triangular shaped soma, or cell body, after which the neuron is named. Other key structural features of the pyramidal cell are a single axon, a large apical dendrite, multiple basal dendrites, and the presence of dendritic spines.
Hairy Cell Leukemia. Hairy Cell Leukemia (HCL) is a type of Chronic Lymphocytic Leukemia (CLL). The disease is called hairy cell because in this subtype of leukemia the malignant lymphocytes have small projections on their surface that give the appearance of hair when one looks at a blood smear under the microscope. The abnormal (malignant) cell in Hairy Cell Leukemia is a B-lymphocyte. This cell infiltrates the bone marrow and usually the spleen. Along with fibrosis (scar tissue), it consumes most of the bone marrow space. As a result, the patient often develops pancytopenia (decreased red cells, white cells and platelets).