Cytology false negatives

What are false negative results?
A test result that incorrectly indicates that the condition being tested for is not present when, in fact, the condition is actually present.
For example, a false-negative HIV test indicates that a person does not have HIV when the person actually does have HIV..
What are the causes of false negatives of Pap smear?
Factors that can cause a false-negative result include:
An inadequate collection of cells.A small number of abnormal cells.Blood or inflammatory cells obscuring the abnormal cells..
What causes a false negative HPV test?
This can happen because: sometimes abnormal cells do not look much different to normal cells. there may be very few abnormal cells in the sample..
False negative smears were identified in 27.1% of women with CC (ADC 52.6% vs.
SCC 16.2%, p\x26lt;0.05).

A smear was scored as being false negative under two circumstances: if, on the visit on which the negative smear was obtained, dys- plasia or carcinoma in situ

In order to assess the false nega- tive rate in cytology of the uterine cervix, the patients with positive smears must first be eliminated from a population and

Does fine needle aspiration cytology cause false negative diagnoses?

Layfield LJ, Dodd LG.
Cytologically low grade malignancies:

An important interpretative pitfall responsible for false negative diagnoses in fine-needle aspiration of the breast

Diagn Cytopathol. 1996;15:250–9. [ PubMed] [ Google Scholar] 99.
Bhatia A.
Fine needle aspiration cytology in the diagnosis of mass lesions of the salivary gland.

What causes false negative cytology reports?

Factors contributing to false-negative and potential false-negative cytology reports in SurePath™ liquid-based cervical cytologyMicrobiopsies/HCGs were the commonest reason for false negatives.
They were usually present in sufficient numbers to be detected but interpretation could be problematic.

Cytology false negatives

What are false negative results?

What are the causes of false negatives of Pap smear?

Factors that can cause a false-negative result include:

What causes a false negative HPV test?

Does fine needle aspiration cytology cause false negative diagnoses?

What causes false negative cytology reports?