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LetterLetter

Antiphospholipid Syndrome and the Aorta: A Rare Presentation

ANJALI SHROFF, HAN-OH CHUNG, NADER A. KHALIDI and ALEX SPYROPOULOS
The Journal of Rheumatology August 2011, 38 (8) 1808-1809; DOI: https://doi.org/10.3899/jrheum.101231
ANJALI SHROFF
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  • For correspondence: anjali.shroff@gmail.com
HAN-OH CHUNG
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NADER A. KHALIDI
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ALEX SPYROPOULOS
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To the Editor:

Antiphospholipid syndrome (APS) is a disorder of coagulation that is usually manifested by arterial or venous thrombosis, or pregnancy-related complications such as miscarriage, stillbirth, preterm delivery, or severe preeclampsia1. The syndrome occurs due to the autoimmune production of antibodies against the cell membrane phospholipid.

A 39-year-old woman presented to the emergency department with severe abdominal pain. An abdominal computed tomography (CT) angiogram showed complete occlusion of the distal abdominal aorta from the origin of the left renal artery, common and external iliac artery occlusion, extensive infarcts of kidneys and spleen, and a superior mesenteric artery thrombus (Figures 1 and 2).

Figure 1.
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Figure 1.

Abdominal computed tomography coronal slice shows large aortic thrombus extending infrarenally.

Figure 2.
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Figure 2.

Axial computed tomography reveals large aortic thrombus and left renal infarcts.

She had a history of intermittent left upper-quadrant abdominal pain with radiation to the back with nausea and diapheresis. Her history was significant for hypertension, a remote history of peptic ulcer disease, and chronic back pain. Her obstetric history was G5P4A1 with one spontaneous abortion at 10 weeks’ gestation. Her medications were hydrochlorothiazide, and oxycodone/paracetamol and ibuprofen as needed for back pain. She was not taking oral contraceptives. She was a tobacco smoker with a 12.5 pack-year history. She drank alcohol occasionally and denied any recreational or intravenous drug use. There was no family history of thrombosis or malignancy.

On examination, she was hypertensive (blood pressure 159/115) and tachycardic (120 bpm) but was otherwise stable and afebrile. Her examination was unremarkable except for some abdominal tenderness on her left side with some costovertebral angle tenderness.

A complete blood count showed hemoglobin 124 g/l (normal 115–165 g/l), leukocyte count 20.2 × 109/l (normal 4.0–11.0 × 109/l), and platelet count 635 (normal 150–400 × 109/l). Electrolytes were normal and creatinine was elevated at 109 μmol/l (previously 60 μmol/l). Her urinalysis revealed 3+ proteinuria with 2+ blood.

An extensive hypercoagulable investigation was performed. Protein C and S levels and activated protein C resistance (APCR) ratio were normal. Prothrombin gene mutation screen and Janus Kinase 2 (JAK2) were negative. Homocysteine level was insignificantly elevated at 14.8 (normal 4–12). Paroxysmal nocturnal hemoglobinuria was ruled out with negative cell markers for CD55 and CD59. A 24-hour urine collection was negative for nephrotic syndrome.

Screening for APS revealed a negative VDRL screen, but a positive dilute activated partial thromboplastin time with a positive 1:1 mix, suggesting the presence of a lupus-like inhibitor. As a result, she was also investigated for a possible connective tissue disease (CTD). Her history was unrevealing for any symptoms of CTD. She had an elevated erythrocyte sedimentation rate (46) and C-reactive protein (13.8). Antinuclear antibody, extractable nuclear antigens, rheumatoid factor, anticitrullinated protein antibody (anti-CCP), antineutrophil cytoplasmic antibodies, complement levels, immunoglobulins, and protein electrophoresis were all normal. Screening for hepatitis B and C and HIV revealed a positive hepatitis C serology. However, she was negative for cryoglobulins.

Polyarteritis nodosa and other large-vessel vasculitides were ruled out as she did not fit diagnostic criteria and the CT angiogram showed no evidence of aneurysms or vessel wall thickening consistent with inflammation. Buerger’s disease was ruled out as she had no evidence of acral involvement. Blood cultures and transesophageal echocardiography were negative for evidence of endocarditis.

With her positive nonspecific inhibitor, a presumptive diagnosis of APS was made. She was anticoagulated with dalteparin, transitioned to warfarin and was discharged home. Her followup visit 5 months later confirmed the presence of a lupus-like inhibitor.

APS is considered secondary if it occurs with other related autoimmune diseases such as systemic lupus erythematosus. Primary APS is diagnosed when the presence of other related diseases is excluded.

The Sapporo criteria2 require one clinical criterion (vascular thrombosis or pregnancy mortality before 10 weeks) and one laboratory criterion (one of lupus anticoagulant, anticardiolipin antibody, or anti-ß2-glycoprotein antibody are positive twice at least 12 weeks apart) for diagnosis of APS. The 3 laboratory criteria are used because of the variability of APS cases, as not all patients present homogenously3,4.

Our patient had an extremely rare form of thrombosis in the great vessels. To our knowledge, there are only 4 other case reports in the literature3,4,5,6 — none with the feature of complete aortic occlusion observed in this patient.

Thus, our patient fit the clinical criteria with extensive splenic, kidney, superior mesenteric artery, and aortic thrombi, and pregnancy loss at 10 weeks’ gestation. She has also had 2 confirmed episodes of a lupus-like inhibitor. She was negative for the anticardiolipin antibody, and the anti-ß2-glycoprotein test is not done at our institution. This suggests a rare form of primary APS with involvement of the great vessels.

REFERENCES

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    1. Levine JS,
    2. Branch DW,
    3. Rauch J
    . The antiphospholipid syndrome. New Engl J Med 2002;346:752–63.
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    1. Miyakis S,
    2. Lockshin MD,
    3. Atsumi T,
    4. Branch DW,
    5. Brey RL,
    6. Cervera R,
    7. et al.
    International consensus statement on an update of the classification criteria for definite antiphospholipid syndrome (APS). J Thromb Haemost 2006;4:295–306.
    OpenUrlCrossRefPubMed
  3. 3.↵
    1. Asherson RA,
    2. Khamastha MA,
    3. Ordis-Ros J
    . The primary antiphospholipid syndrome: Major clinical and serological features. Medicine 1989;68:366–74.
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    1. McGee GS,
    2. Pearce WH,
    3. Sharma L,
    4. Green D,
    5. Yao JS
    . Antiphospholipid antibodies and arterial thrombosis. Case reports and a review of the literature. Arch Surg 1992;127:342–6.
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  5. 5.↵
    1. Alfayate JM,
    2. Acin F,
    3. Bueno A,
    4. March JR,
    5. Lopez-Quintana,
    6. Cancer S,
    7. et al.
    Aortoiliac thrombosis in antiphospholipid syndrome — Case report and literature review. Vasc Endovasc Surg 2002;36:311–5.
    OpenUrlAbstract/FREE Full Text
  6. 6.↵
    1. Insko EK,
    2. Haskal ZJ
    . Antiphosphlipid syndrome: patterns of life-threatening and severe recurrent vascular complications. Radiology 1997;202:319–26.
    OpenUrlPubMed
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1 Aug 2011
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Antiphospholipid Syndrome and the Aorta: A Rare Presentation
ANJALI SHROFF, HAN-OH CHUNG, NADER A. KHALIDI, ALEX SPYROPOULOS
The Journal of Rheumatology Aug 2011, 38 (8) 1808-1809; DOI: 10.3899/jrheum.101231

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Antiphospholipid Syndrome and the Aorta: A Rare Presentation
ANJALI SHROFF, HAN-OH CHUNG, NADER A. KHALIDI, ALEX SPYROPOULOS
The Journal of Rheumatology Aug 2011, 38 (8) 1808-1809; DOI: 10.3899/jrheum.101231
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