Basicmedical Key

Clinical Features Colonoscopic studies have reported the following incidence of endoscopically removed polyps: HPs (23.8% to 29%), SSA/P (2.2% to 9.0%), TSA (0.7% to 1.9%), and traditional adenoma (59% to…

Ideally, all patients with suspected bone tumors should be discussed in multidisciplinary team meetings, including the radiologist and pathologist involved in the diagnosis and the (orthopedic) surgeon and oncologist involved…

Microscopic Features. At low-power, several patterns may be encountered, and typically two or more are present in the same tumor (Figs. 55.4 to 55.9). The most common is a diffuse…

The practicing surgical pathologist is now likely to encounter specimens beyond valve leaflets and pericardiectomy specimens. In centers with active interventional, transplant, and surgical programs, endomyocardial biopsies (EMBs), ventricular core…

Seborrheic keratosis is one of the most common benign epidermal lesions of adult life. It typically presents from the fourth decade and beyond as a rough-surfaced papule, nodule, or plaque…

A thin basement membrane separates the urothelium from the underlying lamina propria. The latter is formed of abundant connective tissue containing a rich vascular network, lymphatic channels, sensory nerve endings,…

Since the last WHO classification of 2004, there have been many additions to our knowledge about renal neoplasms (23). A number of entities that were included among other subtypes earlier…

The intra-adrenal and extra-adrenal paraganglia and the sympathetic nervous system are intimately associated during embryonic development and arise from the neural crest. The cortical anlage is invaded on its medial…

SIGNIFICANCE OF THE RENAL SINUS The renal sinus, illustrated in Figure 43.1, is the concave region on the medial aspect of the kidney, which contains the major renal vessels and…

Brunner glands in proximal duodenal specimens have an inconsistent effect on villous architecture (3). Normal-length villi may be encountered overlying the Brunner glands, but the villi usually are distorted and…