The Bethesda method (TBS) for repo...

The Bethesda method (TBS) for reporting cervical or vaginal cytologic diagnoses was introduced in 1988 (1) and revised in 1991 (2) to establish uniform terminology and standardize diagnostic reports. In addition, it introduced a standardized approach for reporting if an individual specimen is adequate for evaluation. TB 2001 was lay opened through a process that involved committee review of the literature, solicitation of adroit opinions, and discussion of the propos changes onward an interactive Web site. (3) [Evidence plain C, consensus/expert guidelines] The terminology of TB 2001 (3) which was adopted in May 2001 includes revisions in statements of adequacy, general categorization, and interpretation and be deriveds of epithelial cell abnormalities (Table 1) (3) The American Society for Colposcopy and Cervical Pathology Consensus conversation subsequently developed guidelines for the management of cervical cytologic abnormalities. (4) [Evidence flat C, consensus/expert guidelines]

Specimen Adequacy

TB 1991 (2) reported the adequacy of cervical cytology preparations in three categories: "satisfactory," "unsatisfactory," and "satisfactory further limited by," or SBLB. SBLB included factors like as the lack of transformation region components and the presence of partially obscuring factors (i.e., family or inflammation). This category was confusing to an clinicians and prompted unnecessary repeat testing.

It has been shown that the appearance of endocervical cells as a quality indicator of adequate sampling increases the detection of cervical abnormalities (5) ; however, other studies (67) have not demonstrated that a lack of transformation band components in otherwise negative specimens indicates a higher risk of later detection of histologic high-grade squamous intraepithelial lesions (HSIL). Lack of endocervical small rooms has not been shown to be associated with an exces of disease in longitudinal studies in which histologic disease, rather than cytologic prediction of disease, is the conclusion point. (8)

Partially obscuring factors also have not been shown to increase the risk for a false-negative report. (9) In TB 2001 (3) the SBLB category is eliminated, and make notess about transformation zone components or partially obscuring factors are placed in the satisfactory or unsatisfactory categories as a means of providing feedback to improve specimen adequacy (10) (Table 2) (13) Because specimens lacking a transformation belt component now will be reported as "satisfactory for evaluation," clinicians should read the narrative report carefully to learn that the transformation climate was not sampled.

simply eliminating SBLB will not change the cytologic appearance of the specimens. This, in conjunction with the introduction of specific numeric criteria for the number of small rooms that must be present upon a slide for it to be classified as satisfactory for evaluation, means that the rate of unsatisfactory specimens likely will increase significantly. (11)

The unsatisfactory category includes specimens that do not contain sufficient confined apartments for reliable interpretation. However, any specimen with abnormal enclosed spaces will be described as satisfactory for evaluation regardless of the number of small cavitys present. (3) This does not mean that an unsatisfactory specimen bring reproachs the absence of a neoplastic proces Although an unsatisfactory specimen can set forth a benign condition, a considerable number of women with unsatisfactory specimens have a following histologic diagnosis of squamous intraepithelial lesion (SIL) or cancer. (12)

General Categorization

In TB 2001 cervical cytologic specimens that contain no epithelial abnormalities are listed in subordination to the category "negative for intraepithelial lesion or malignancy." (3) This category now encompasses the previous categories of "within normal limits" and "benign cellular changes" (13) (Table 2) (13) The vicinity of organisms (listed as "infections" in TB 1991 (2)) in the same state [i]or[/i] condition as Trichomonas vaginalis or fungal organisms consistent with Candida species will be included as a exposition in this "negative" category. ingredients that are optionally listed in the negative category include atrophy, radiation, and inflammation.

Interpretation/Result

EPITHELIAL confined apartment ABNORMALITY, SQUAMOUS

Atypical Squamous solitary abode; squalids Since TBS 1988, (1) the category of "atypical squamous lonely dwellings of undetermined significance" (ASCUS) has included lonely dwellings for which a reliable interpretation of SIL cannot be made although the small rooms contain features that are more marked than barely reactive changes. (14) Subcategories of ASCUS were not used in TB 1991 (2) on the contrary in an attempt to define risk, it was adviseed that qualifiers such as "ASCUS, favor reactive," or "ASCUS, favor neoplastic" could be used. However, no consensus was reached upon how to define each subcategory, and numerous studies showed that the use of these qualifiers was nonreproducible. (15)

In addition, several studies demonstrated that the diagnosis of ASCUS cannot be ignored. A contemplation (16) of 4,143 diagnoses of ASCUS with posterior histology reported that in 63 percent of the women SIL or malignancy was find outed on further follow-up. In a subject of attention (17) correlating cervical cytology and succeeding histology in 560 women with ASCUS, 17 percent of the follow-up biopsies demonstrated HSIL, and 19 percent showed a low-grade squamous intraepithelial lesion (LSIL).