1. Desai, N. R., Gupta, S., Said, R., Desai, P. &
Dai, Q. Choriocarcinoma in a 73-year-old woman:
A case report and review of the literature. J. Med.
Case Rep. 4, 2–6 (2010).
2. Dilek, S., Pata, Ö., Tok, E. & Polat, A.
Extraovarian nongestational choriocarcinoma in a
postmenopausal woman. Int. J. Gynecol. Cancer
14, 1033–1035 (2004).
3. Whaley, R. D., Dougherty, R. E., Cheng, L. &
Ulbright, T. M. Fluorescence In Situ Hybridization
for the X and Y Chromosome Centromeres
Helps Differentiate Between Gestational and
Nongestational Choriocarcinoma in Clinically
Ambiguous Cases. Arch. Pathol. Lab. Med. 144,
863–868 (2020).
4. Salazar-Mejía, C. E. et al. Choriocarcinoma
Syndrome as an Initial Presentation of Testicular
Cancer. Case Rep. Oncol. Med. 2018, 1–3 (2018).
5. Çorakçi, A. et al. Pure nongestational
choriocarcinoma of ovary. Arch. Gynecol. Obstet.
271, 176–177 (2005).
6. Lv, L., Yang, K., Wu, H., Lou, J. & Peng, Z.
Pure choriocarcinoma of the ovary: A case report. J.
Gynecol. Oncol. 22, 135–139 (2011).
7. Rawal, G., Ahluwalia, C., Yadav, A. K.
& Dhawan, I. Case Report Primary pure nongestational choriocarcinoma of ovary : a rare case
report. 6, 4166–4169 (2017).
8. Hayashi, S. et al. Primary non-gestational
pure choriocarcinoma arising in the ovary: A case
report and literature review. Oncol. Lett. 9, 2109–
2111 (2015).
9. Lee, S.-C. et al. Mixed Testicular Germ
Cell Tumor Presenting as Metastatic Pure
Choriocarcinoma Involving Multiple Lung
Metastases That Was Effectively Treated with
High-dose Chemotherapy. Cancer Res. Treat. 41,
229 (2009).
10. Choi, Y. J., Chun, K. Y., Kim, Y. W. & Ro,
D. Y. Pure nongestational choriocarcinoma of the
ovary: A case report. World J. Surg. Oncol. 11, 2–4
(2013).
11. Seppälä, M., Bagshawe, K. D. & Ruoslahti,
E. Radioimmunoassay of alpha‐fetoprotein: A
contribution to the diagnosis of choriocarcinoma
and hydatidiform mole. Int. J. Cancer 10, 478–481
(1972)