Category: S

A group of nuclei in the pons and medulla oblongata consisting of the spinal nucleus, which extends inferiorly into the spinal cord, the main nucleus, which lies dorsal and lateral to the motor nucleus, and the mesencephalic nucleus, which lies in the lateral wall of the fourth ventricle.  

The nucleus of termination of the afferent fibers of a peripheral nerve.  

The nucleus of a zygote formed by fusion of the male and female pronuclei.  

A notch between the orbital and sphenoidal processes of the palatine bone.  

A notch on the anterior aspect of the proximal end of the ulna for articulation with the trochlea of the humerus.  

A deep notch on the superior border of the scapula that transmits the suprascapular nerve.  

Small, nontender swellings resembling Aschoff’s bodies and found over bony prominences in persons with rheumatic fever or rheumatoid arthritis (in rheumatoid arthritis, they are called rheumatoid nodules).  

Any isolated mass lesion found in the lung, usually during an x-ray study performed for another reason. Most small masses that are identified in this way are benign, although smokers, patients already known to have cancer in another organ system, and older patients have an increased risk that a solitary nodule will be a new…

An isolated nodule of lymphatic tissue such as occurs in mucous membranes.  

Small brown nodules seen in the spleen and other organs and consisting of necrotic tissue encrusted by iron salts.