Turner syndrome (TS) is the most common cause of short stature and delayed puberty in females. Approximately half patients have classic form with a genotype 45,XO, one-fourth different mosaic forms, remaining structural abnormalities on X chromosome. Among abnormalities, isochromosome Xq. Females variants TS can present menarche, amenorrhea, infertility rather than manifestations TS. This study...

Acquired resistance to chemotherapy is a major obstacle to the successful treatment of cancer. In the past, technical limitations pre vented the detection of genetic alterations associated with such resist ance on a genome-wide scale. This study evaluated comparative genomic hybridization (CGH) as a tool to detect candidate regions of the genome associated with chemoresistance. Using a variatio...

Amplification of DNA in certain chromosomal regions, with consequent over-expression of specific genes within these amplicons, plays a crucial role in the development and progression of human cancer. Since our previous comparative genomic hybridization (CGH) study revealed frequent amplifications at 18p in esophageal squamous cell carcinomas (ESC) cell lines, we focused on the identification of...

Acquired resistance to chemotherapy is a major obstacle to the successful treatment of cancer. In the past, technical limitations prevented the detection of genetic alterations associated with such resistance on a genome-wide scale. This study evaluated comparative genomic hybridization (CGH) as a tool to detect candidate regions of the genome associated with chemoresistance. Using a variation ...

Studies of sequential molecular alterations in noninvasive and invasive head and neck squamous carcinoma are few in number. Consequently, the genetic changes associated with the neoplastic transformation of these carcinomas have not been defined. To identify chromosomal alterations in preinvasive and invasive head and neck squamous carcinoma, we analyzed DNA from microdissected normal squamous ...

Morphological abnormalities of the X chromosome are well documented and have been extensively reviewed and discussed by Ferguson-Smith (1965). They include isochromosome of the long arm, deletions of the long and short arms, ring chromosomes, and chromosomal fragments. Other types of abnormality are rare. Engel and Forbes (1965) described a chromatin negative girl (Patient No. 27) with a mosaic...