Basicmedical Key

Maximal stress and strain are exerted at the tidemark, where there is an abrupt change in the mechanical properties of the cartilage, the noncalcified malleable surface becoming sharply rigid in…

In adults, a variety of histologic subtypes of non-Hodgkin lymphoma have been encountered. Most are diffuse large B-cell lymphomas, but some are follicular, and rarely, they are of T-cell lineage….

The lamina propria of the larynx is composed of a loose stromal tissue with numerous small vessels, lymphatic channels, and nerves. The vocal cord is an exception, and although some…

Neisseria gonorrhoeae and Chlamydia trachomatis are common initiating sexually transmitted pathogens, with 15% of endocervical infections resulting in pelvic inflammatory disease (PID) (1–3). There are conflicting reports regarding the role…

THE NORMAL PITUITARY ANTERIOR LOBE The anterior pituitary or adenohypophysis constitutes the largest portion of the pituitary gland, about 75% to 80%, and it is formed by the pars distalis,…

Changes in oxygen (O2) tension are detected by O2-sensitive K+ and Ca2+ channels, and a suprathreshold increase of cytosolic Ca2+ triggers neurotransmitter (i.e., dopamine) release, which activates afferent nerve terminals…

FAMILIAL NON-MARFAN DISSECTIONS Familial aortic dissections are about as common in patients without extravascular abnormalities as in patients with Marfan syndrome (3). The genetic basis is not known, although it…

The underlying lamina propria consists of fibrovascular tissue folded into slender papillae that project into the epithelium. These papillae generally extend to less than two-thirds of the epithelial thickness, except…

The number of tissue blocks varies depending on the size of the spleen, macroscopic findings, and the clinical setting. Generally, I submit from 4 to 10 blocks for histologic studies….

On ultrastructural examination, adult Sertoli cells have convoluted nuclei and prominent nucleoli. The basal cytoplasm contains lipid droplets, glycogen, spherical and elongated mitochondria, thin filaments, and a Golgi complex. Charcot-Böttcher…