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Τετάρτη 31 Μαΐου 2017

Myeloid sarcoma identified on liquid-based cervical cytology samples: A report of two cases

The purpose of the Papanicolaou (Pap) smear is to detect primary squamous lesions of the uterine cervix. Although most successful at detection of squamous lesions, the Pap may also detect metastatic carcinomas, sarcomas, and melanomas. We report two rare cases of myeloid sarcoma (MS) of the uterine cervix identified on screening Pap smears with concurrent confirmatory cervical biopsies. The purpose of our study is to identify and report cytologic features of MS on Pap smears utilizing a liquid-based ThinPrep method, which has not been previously documented in literature. Two Pap smears were identified from the pathology laboratory information system, both with positive cervical biopsy findings of MS. Both women, age 40 and 39, presented with ureteral obstruction, hydronephrosis, and past medical histories significant for acute myeloid leukemia (AML). On imaging, cervical masses were identified, and subsequent work-up with Pap smears and biopsies were performed. Cytologic examination of the ThinPrep Pap smears were negative for squamous intraepithelial lesion. Atypical hematologic cells were seen in the background with irregular nuclear contours, increased nuclear to cytoplasmic ratios, variably prominent nucleoli, and variable amounts of agranular cytoplasm. The biopsy confirmed these findings to represent MS. MS is defined as a tumor mass of myeloblasts or immature myeloid cells occurring in an extramedullary site. This rarely involves the female genital tract, about 50 reported cases. Although very rare, MSs in the setting of a history of AML are able to be identified on liquid-based ThinPrep smears.



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