Thrombocytopenia (54 × 109/L), lymphopenia (0.54 × 109/L), prolonged APTT (60 s), transaminitis (AST 81 IU/L; ALT 41 IU/L), elevated C-reactive protein (37 mg/L) and ferritin (431 μg/L) were observed upon hospital admission. The gene discussed is GPT; the disease is lymphopenia.