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A uterine fibroid can cause rectal pressure. The abdomen can grow larger mimicking the appearance of pregnancy. [1] Some large fibroids can extend out through the cervix and vagina. [7] While fibroids are common, they are not a typical cause for infertility, accounting for about 3% of reasons why a woman may not be able to have a child. [10]
Leiomyoma enucleated from a uterus. External surface on left; cut surface on right. Micrograph of a small, well-circumscribed colonic leiomyoma arising from the muscularis mucosae and showing fascicles of spindle cells with eosinophilic cytoplasm and elongated, cigar-shaped nuclei Immunohistochemistry for β-catenin in uterine leiomyoma, which is negative as there is only staining of cytoplasm ...
From their observations, they concluded that quickly dividing tumor cells are generally more sensitive than the majority of body cells. This is not always true. Tumor cells can be hypoxic and therefore less sensitive to X-rays because most of their effects are mediated by the free radicals produced by ionizing oxygen.
Following promotion, progression may take place where more genetic mutations are acquired in a sub-population of tumor cells. Progression changes the benign tumor into a malignant tumor. [ 33 ] [ 34 ] A prominent and well studied example of this phenomenon is the tubular adenoma, a common type of colon polyp which is an important precursor to ...
Experts still don’t have basic answers as to why human ovaries age two times faster than the rest of their body. Or why humans go through menopause in the first place (a process we share with ...
The cell survival curve is a curve often used in radiobiology that represents the relationship between the amount of cells retaining reproductive capabilities and the absorbed dose of radiation from said cells. Tumor cells are able to grow infinitely, while normal cells must undergo treatment in order to grow indefinitely (see Cellular ...
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The inhibition of clone-formation by cultured human cells was measured after exposure to alpha-particles, deuterons and 250 kVp x-rays by Barendsen et al. (1966). The range of the maximum OER for 100% oxygen (at 760 mmHg) was 2.7 for 250 kVp x-rays dropping to 1.0 for 2.5 MeV alpha-particles.
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