RT Journal Article T1 Complement-mediated thrombogenic vasculopathy in COVID-19. A1 Perea-Polak, Alexandra A1 Romero-Madrid, Beatriz A1 Garcia-Ocaña, Paula Patricia A1 Lomeña-Alvarez, Guillermo A1 Martinez-Pilar, Leandro A1 Gomez-Moyano, Elisabeth K1 Blood Pressure K1 Tachypnea K1 Coombs Test K1 Hypertension K1 Amputation, Surgical AB We present the case of a 61-year-old woman who attended the Emergency Department with fever, tachypnea, abdominal discomfort, pain, and coldness in the right lower leg suggestive of ischemia. Her medical history included hypertension treated with losartan and depression, with a recent history of cognitive impairment. Capillary plexus (Fig. 1c) was noted. Autoantibody studies showed a positive direct Coombs test, and direct antibody testing was positive for C3. Anticardiolipin, anti–b2-glycoprotein antibodies, and lupus anticoagulant were all negative. Physical examination revealed punctiform purpura on the arms and lower legs (Fig. 1a). Peripheral pulses in the right leg were absent. Oxygen saturation (SaO2) was 98% on air, and blood pressure was 70/56 mmHg. Laboratory values included hemoglobin 8.1 g/dl (1216.5); 14,600 white blood cells/µl (4,000–11,500); creatinine 3 mg/dl (0.43–0.96); D-dimer level 5,977 ng/ml (220–500); LDH 281 U/liter (120–246); elevated C-reactive protein 279 mg/l; and troponin I 128 ng/l (3–58). The platelet count, prothrombin, and activated partial thromboplastin times were all normal. Doppler ultrasound showed complete occlusion of the right common femoral artery, requiring supracondylar amputation. PB Wiley YR 2020 FD 2020 LK http://hdl.handle.net/10668/16705 UL http://hdl.handle.net/10668/16705 LA en NO Perea Polak A, Romero Madrid B, García Ocaña PP, Lomeña Alvarez G, Martínez Pilar L, Gómez-Moyano E. Complement-mediated thrombogenic vasculopathy in COVID-19. Int J Dermatol. 2021 Feb;60(2):229-232 DS RISalud RD Apr 5, 2025