Sex Cord–Stromal, Steroid Cell, and Germ Cell Tumors of the Ovary
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…
Nonmelanocytic Cutaneous Tumors
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…
Urothelial Tract: Renal Pelvis, Ureter, Urinary Bladder, and Urethra
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,…
Adult Renal Tumors
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…
Adrenal Glands
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…
Renal Neoplasms of Childhood
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…
Nonneoplastic Intestinal Diseases
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…
Pulmonary Neoplasms
MATERIALS FOR DIAGNOSIS Pathologists must deal with a variety of different materials, including cytologic preparations, biopsies, surgical specimens, and frozen sections in approaching the diagnosis of pulmonary neoplasia. Cytologic Materials…
Peritoneum
Noninfectious Causes Foreign material that is usually recognizable on microscopic examination can elicit a granulomatous reaction on the peritoneum. Starch granules from surgical gloves (7), douche fluid, and lubricants typically…
