Dirty Background

Gynaecologic cytology A nonspecific finding in Pap smears of the uterine cervix, consisting of inflammation, cellular debris, and necrosis, which may be seen in infections with Gardnerella vaginalis or Trichomonas spp, pregnancy, post-partum, post-menopause, oral contraceptive use, and cervical cancer Note: Dirty background is less common in cytologic specimens obtained from liquid based cytology
Pathology A term of art for the karyorrhectic debris typically associated with ulcerated and acutely inflammed mucosa, a soft criterion that provides the pathologist with some level of confidence that he/she is dealing with a malignancy
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Among the attendees, however, are the upstart Coles and Coxes, as well as Harriet Smith, who turns out to be the natural daughter of a tradesman, so the class hierarchy that Emma has supported begins to break down in the presence of the dirty background, however muted by the dim light.
No one wants to see a dirty background." Vashisht then gets ready and does her make-up.
The presence of eosinophils, neutrophils, palisading histiocytes, giant cells, and atypical granular dirty background in an aspirate from a subcutaneous nodule should alert the cytopathologist of a parasitic infestation.
The clean imprint stands out against the dirty background and lasts from a few days to several weeks, depending on foot traffic and weather.