corpora lutea (corpus luteum)
Definition: Corpus luteum is 1 to 2 cm, round yellow, lobulated structure with cystic center. It has luteinized granulosa and theca cells.
In pregnancy, coprus luteum is larger, bright yellow with prominent central cavity, hyaline droplets and calcification. Progesterone from the corpus luteum maintains the uterus for implantation.
The corpus luteum secretes progesterone which induces a secretory endometrium. It normally regresses in 14 days unless it is (...)
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corpus luteum
17 November 2004 -
spleen
28 August 2003Normal spleen. Adj. splenic
WP - PathPedia
Digital slides
HPC:97 : Normal spleen
HPC:266 : Normal spleen
HPC:300 : Normal spleen (Idiopathic thrombopenic purpura)
Images
normal spleen
https://twitter.com/histocasino/status/743550252267999232
The spleen (from Greek σπλήν—splḗn) is an organ found in virtually all vertebrate animals. Similar in structure to a large lymph node, it acts primarily as a blood filter. Thus, life is possible after the spleen is removed.
The spleen is the (...) -
synovium
19 November 2005Adj. synovial. Normal synovium.; stratum synoviale ; synovium; synovial membrane WKP
Definition: The synovial membrane is a specialized connective tissue that lines the inner surface of capsules of synovial joints and tendon sheath.
Components
synovial cells / synoviocytes
connective tissue
Localization
articular synovium
synovial bursa
tendon sheath
Functions
The synovial membrane makes direct contact with the synovial fluid lubricant, which it is primarily (...) -
cardiomyocytes
18 November 2003Adj. cardiomyocytic; cardiac myocytes, cardiomyocyte
Digital slides
NCK2-18: normal endomyocardial biopsy (PAS)
NCK2-19: normal endomyocardial biopsy (PAS diastase)
Definition: The myocardium is composed primarily of a collection of specialized muscle cells called cardiac myocytes or cardiomyocytes.
They are arranged largely in a circumferential and spiral orientation around the left ventricle, the chamber that pumps blood to the systemic circulation.
Cardiac myocytes have five (...) -
alveoli
28 February 2005pulmonary alveoli, pulmonary alveoles, pulmonary air spaces. Adj. alveolar
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smooth muscle actin
31 October 2004SMA; Actin (Smooth Muscle) IHCDB
Definition: An anti-SMA antibody labels smooth muscle cells, myofibroblasts and myoepithelial cells, and is useful for the identification of leiomyomas, leiomyosarcomas, and pleomorphic adenomas.
It is expressed by :
myofibroblastic tumors
smooth muscle tumors as leiomyomas and leiomyosarcomas
some skeletal muscle tumors as some rhabdomyosarcomas
See also
actin microfilaments
immunohistochemical (...) -
Physeal growth plate
13 January 2005physeal growth zone, epiphyseal growth zone, physis
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epithelial anomalies
11 July 2003Epitheliums, epithelia, epithelium. Adj. epithelial
Types
simple epitheliums
simple squamous epithelium
simple cuboidal epithelium
simple columnar epithelium
simple ciliated columnar epithelium
pseudostratified columnar ciliated epitheliums
pseudostratified columnar ciliated epithelium with goblet cells
respiratory epithelium
stratified epitheliums
stratified squamous nonkeratinizing epithelium
stratified squamous nonkeratinizing epithelium
stratified squamous (...) -
osteoclasts
29 October 2003Definition: The osteoclast is the cell responsible for bone resorption. It is derived from hematopoietic progenitor cells that also give rise to monocytes and macrophages.
Information regarding the molecular regulation of osteoclast formation in humans is limited. In mice, a number of transcription factors, including PU.1 and Fos, are essential for developing an osteoclast phenotype.
The cytokines and growth factors crucial for osteoclast differentiation and maturation in humans include (...) -
osteoid osteoma
8 December 2005Digital cases - Digital slides
HPC:414 : Osteoid osteoma
UI:857 - Osteoid osteoma
Definition: Osteoid osteoma is a benign bone-forming tumour with limited growth potential, inducing disproportionate pain. Rearrangements of FOS and FOSB.
Osteoid osteoma is a benign osteoblastic tumor that Bergstrand first described in 1930. Jaffe described it in 1935 and was the first to recognize it as a unique entity.
Osteoid osteomas are usually smaller than 1.5-2 cm and characterized by an (...)