Table 1.

Relevant laboratory data from our patient

Date	Factor VIII activity (%) [50–200]*	Factor VIII inhibitor panel	aPTT (sec) [22–32]	Hemoglobin (g/dL) [12–16]	Platelets (K/μL) [140–440]
11/16/20				13.9	389
8/6/21			39.6	6.6	894
9/14/21	12	Not detected	41.7	5.1	658
9/29/21	8	Detected	32.2	9.6	642
10/22/21	16		26.5	11.0	388
11/5/21	53	Not detected	24.3	11.9	503
12/22/21	184			13.9	401
4/8/22				12.9	329

^*Values in brackets represent reference range. aPTT indicates activated partial thromboplastin time.