TY - JOUR T1 - Cytodiagnosis of extragonadal pure yolk sac tumor of sacrococcygeal region A1 - Kavita Mardi A1 - Neha Bakshi JF - Clinical Cancer Investigation Journal JO - Clin Cancer Investig J SN - 2278-0513 Y1 - 2014 VL - 3 IS - 1 DO - 10.4103/2278-0513.125814 SP - 105 EP - 107 N2 - Yolk sac tumors (YST) are rare in extragonadal location. Cytologic diagnosis of YST in such instances may be a challenge to the pathologist. We studied Fine needle Aspiration (FNA) material from a sacrococcygeal mass in a 18-month-old female child presenting with a progressively increasing sacrococcygeal mass. Cytologic features include large pleomorphic balls of tumor cells with high nuclear to cytoplasmic ratios, papillary or micro-glandular pattern of growth, cytoplasmic and intra-nuclear vacuoles, and prominent nucleoli. Per Iodic Acid Schiff (PAS) positive intra-cytoplasmic as well as extracellular hyaline globules were also seen. The subsequent biopsy was consistent with the FNA diagnosis, and immuno-histochemically, the tumor cells were positive for Alpha Feto Protein (AFP) supporting the diagnosis. UR - https://ccij-online.org/article/cytodiagnosis-of-extragonadal-pure-yolk-sac-tumor-of-sacrococcygeal-region-160 ER -