Abstract
Severe congenital factor XIII deficiency is a rare blood coagulation disorder that poses a risk of life-threatening bleeding complications. Conversely, patients with mild or moderate factor XIII deficiency frequently exhibit delayed or provoked bleeding patterns. This case report presents a patient who received a delayed diagnosis of moderate factor XIII deficiency following significant bleeding episodes in the postoperative period. We will examine the symptoms indicative of mild and moderate factor XIII deficiency, as well as the current therapeutic options. This discussion emphasizes the vital importance of early diagnosis for achieving optimal management and improved patient outcomes.