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  • Title: Merits and pitfalls of normal saline rehydrated air-dried cervical smears over conventional wet.fixed PAP smears: A comparative study.
    Author: Kamble SA, Dombale VD, Shah F.
    Journal: Indian J Pathol Microbiol; 2022; 65(1):100-104. PubMed ID: 35074972.
    Abstract:
    BACKGROUND: Cervical Papanicolaou (PAP) smear is the simplest, minimal invasive, and excellent screening method to reduce the female morbidity and mortality due to cervical carcinoma. Immediate alcohol fixation of the cervical smears is required to preserve nuclear details, delay in alcohol fixation leads to air drying artifacts. Rehydrating of the air-dried cervical pap smear with normal saline can help to overcome these artifacts and also have its own advantages. AIMS: This study was design to evaluate the effects, merits and pitfalls of normal saline Rehydrated Air-Dried Cervical PAP Smears (RADPS) compared with the Conventional Papanicolaou Smear (C-PAPS). SETTINGS AND DESIGN: Comparative study. METHODS AND MATERIAL: Prospectively paired cervical smears of 100 women, who presented to the outpatient department of gynecology of our institute, were prepared. Alcohol fixed smears were labelled as conventional Papanicolaou smear (C-PAPS) and air-dried smears labelled as rehydrated air-dried PAP smears (RADPS). Eight cytomorphological parameters were considered for comparison and analyzed. STATISTICAL ANALYSIS USED: Chisquare (χ2)/Fisher exact test. RESULTS: Clear background with red blood cells (RBC) lysis was noted in 93% of RADPS and 54% of C-PAPS. Cytolysis was observed more in C-PAPS (18%) than in RADPS (08%). Air-drying artifacts observed in 30% of C-PAPS and 08% of RADPS. Cytoplasmic staining (92% of RADPS and 85% of C-PAPS) was superior in RADPS. Cell border, nuclear chromatin, and border were also better appreciated on RADPS as compared to C-PAPS. Statistically significant difference was observed with 3 parameters, i.e., air-drying artifacts, RBC background, and distinct cell borders. CONCLUSION: Rehydration of air-dried smears can be adopted in regular practice, as an alternative or coupled with conventional wet fixation method to overcome the commonly faced problems of air-drying artifacts, especially in rural screening programs.
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