Posterior Sex Combs

The Drosophila gene Posterior Sex Combs (Psc) encodes a ring-type zinc finger DNA binding protein (Polycomb group) involved in negative regulation of expression patterns of the antennapedia and bithorax homeotic selector gene complexes, and hence maintenance of segmental determination. Similar sequences have been identified in Homo sapiens and Mus musculus. Psc interacts genetically with z, brm, Sce, mxc, Asx, and several other genes. Mutations in Psc generate malformations of the longitudinal tracts. (from SWISS-PROT P35820, FlyBase 0005624, and NCI) (NCI Thesaurus)

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The portion of the urethra that is located on the posterior aspect of the urogenital diaphragm.

Posterior Pituitary Gland Neoplasm

A low-grade neoplasm that arises from the neurohypophysis. It includes the granular cell tumor of the neurohypophysis and pituicytoma.

Posterior Pigment Epithelium

Highly pigmented epithelium covering the posterior surface of the iris.

Posterior Pharyngeal Wall Squamous Cell Carcinoma

A squamous cell carcinoma that arises from the posterior wall of the pharynx.

Posterior Pharyngeal Wall Carcinoma

A carcinoma that arises from the posterior wall of the pharynx.

Posterior pelvic exenteration

Surgery to remove the lower part of the bowel, rectum, uterus, cervix, ovaries, fallopian tubes, and vagina. Pelvic lymph nodes may also…