Background: Factor XIII deficiency, which can be congenital or acquired, is a rare disorder. It can cause life-threatening bleeding. It cannot be diagnosed by usual hemostasis tests; only by specific screening tests.
Case Presentation: We report the case of a young pregnant woman whom we discovered a paraneoplastic factor XIII deficiency with the underlying cause of colorectal cancer.
Conclusion: A paraneoplastic context concerning hematologic malignancies as well as solid tumors must not be ignored. No other case of paraneoplastic factor XIII deficiency resulting from colorectal cancer is previously reported in the literature.
Key words: Factor XIII, pregnancy, paraneoplastic syndrome, colorectal cancer, case report
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