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ISSN: 2638-5945

Open Access Journal of Oncology and Medicine

Case Report(ISSN: 2638-5945)

Thrombosis in Iron Deficiency and Iron Deficiency Anemia: A Review of our Cases and the Relevant Literature Volume 2 - Issue 3

Ceren Kılcı1, Lale Olcay1*, Taner Sezer1, I Zafer Ecevit1, Murat Özkan2 and Birgül Varan1

  • 1Department of Pediatrics, Baskent University Faculty of Medicine, Ankara
  • 2Department of Cardiovascular Surgery, Baskent University Faculty of Medicine, Ankara

Received: July 18, 2018;   Published: July 30, 2018

Corresponding author: Lale Olcay, Baskent University Faculty of Medicine, Department of Pediatrics, Unit of Pediatric HematologyOncology, Mareşal Fevzi Çakmak Caddesi, Şehit Temel Kuğuluoğlu Sokak, No:24, 06490, Bahçelievler, Ankara, Turkey

DOI: 10.32474/OAJOM.2018.02.000139

 

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Abstract

We evaluated our thrombosis cases for iron deficiency (ID) or iron deficiency anemia (IDA) retrospectively and reviewed the literature. We established that iron parameters were studied in 17 of 64 patients with thrombosis and 2 of 17 patients had IDA. Case 1 (age 16, female) had occlusions in sigmoid and transverse sinuses and right jugular vein and case 2 (age 15, male) had infarct in right cerebellar hemisphere. While case 1 additionally had mastoiditis, high Factor (F) VIII and PAI 4G/5G polymorphism, case 2 who underwent a recent aortic graft insertion operation for aortic aneurysm had high serum lipids, lipoprotein a, homocysteine, FVIII, d-dimer. Of 54 thrombosis cases with ID/IDA in the literature, cerebral thrombosis made up of 70.4% of all the cases, venous cerebral occlusions comprising 100% and 66% of venous thrombosis in children and adults respectively. Our findings show that ID/ IDA may be a risk factor for thrombosis, especially in cerebral veins.

Keywords: Iron deficiency anemia; Coagulation; Thrombosis; Thromboembolism

Introduction

Many cases of thrombosis have been reported in both children and adults, associated with iron deficiency (ID) or ID anemia (IDA) so far [1-40]. Additionally, the frequency of severe anemia [1] or IDA [2] in adults with cerebral [1] or deep venous thrombosis with/without pulmonary embolism [2] were shown significantly higher than that of the healthy controls. We previously showed by thromboelastogram that children with IDA had a tendency to thrombosis [41]. Herein, we evaluated our patients with IDA and thromboembolism followed in our clinic and reviewed the relevant literature (Tables 1-3).

Materials and Methods

We examined the charts of our patients treated for thrombosis during 2013-2016 and had concomitant IDA/ID; additionally we studied the literature between 1972-2016, through ‘EntrezPubMed and Turkish Citation Index’ databases, matching the key words ‘thrombosis, thromboembolism, hypercoagulability; abnormal coagulation’ with ‘ID or IDA’

Results

Our search revealed that only 17 out of 64 patients with thrombosis diagnosed in our clinic during this period had been evaluated for iron parameters and only the 2 had IDA. These cases are presented below.

Case 1 (O.E.)

A 16-year-old girl was admitted due to headache, nausea, vomiting. She was diagnosed as otitis media (right) two weeks before and received antibiotics for seven days. A few days later, a continuous, blunt headache near right ear and right hemicranium propagating towards the right orbita developed which was accompanied by blurred vision, nausea and vomiting. Her physical examination revealed pallor, nasal discharge, bilateral papilledema and a systolic murmur of grade II/VI on the tract of right jugular vein. Cerebral magnetic resonance (MR) imaging (MRI) was compatible with mastoiditis and right jugular vein thrombosis. Cerebral MR venography revealed obliteration of the transverse sinus and the right jugular vein at the sigmoid sinus level. She had increased Factor (F) VIII and plasminogen activator inhibitor (PAI) 4G/5G polymorphism and IDA. The other laboratory findings are presented in Table 1. She received antibiotics for six weeks, low molecular weight heparin (LMWH) for six months and oral iron for three months. The cerebral MRI, cerebral MR venography taken at the end of the 2nd month revealed normal. She had been well for 24 months of follow-up.

Case 2 (EA)

A 15 3/12-year-old boy was admitted to our clinic due to slight amnesia which developed 5 days after aortic graft insertion operation done for ascending aortic aneurysm. He was operated for aortic coarctation at 7 months of age. His physical examination revealed grade II/VI systolic murmur at the right 2nd intercostal space and little confusion in recalling the near past. The cerebral MRI and diffusion MRI revealed acute infarct in the right cerebellar hemisphere. The electroencephalogram (EEG) was normal. He had IDA, vitamin B12 (VB12) and folic acid deficiencies, elevation levels of homocysteine, FVIII, lipoprotein a, very light density lipoproteins, triglycerides, d-dimer, C-reactive protein (Table 1). He was started prednisolone, lansoprazole, acetylsalicylic acid, LMWH. Amnesia disappeared three days later. Iron and VB12 therapies were added after his condition stabilized. Anti thrombotic therapy was continued with LMWH for six months. He has been well for the 18 months of follow-up.

Table 1: Some characteristics of cases with thrombosis and iron deficiency anemia in our clinic.

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Abbreviations (Alphabetic order): ACA: Anti cardiolipin antibody; ANA: Antinuclear antibody; Anti -DNA: Anti deoxyribonucleic acid; APA: Antiphospholipid antibody; ATIII: Anti thrombin III; C3: Complement 3; C4: Complement 4; CRP: C-reactive protein; CT: Computerized tomography; F: Factor; FA: Folic acid; FDP: Fibrin degradation products; HDL: high density lipoprotein; H: High; LA: Lupus anticoagulant; LDL: low density lipoprotein; M: Male; MHTFR: Methylene tetrahydrofolate reductase enzyme; MRI: Magnetic resonance imaging; N: Normal; PAI-1: Plasminogen activator inhibitor-1; PNH: Paroxysmal nocturnal hemoglobinuria; Pro C: Protein C; Pro S: Protein S; Prt: Prothrombin; PT: Prothrombin time; aPTT: Activated thromboplastin time; TG: Triglyceride; TT: Thrombin time; VB12: Vitamin B12; VLDL: very low density lipoprotein; vWF: Von Willebrand factor; W: Woman

Literature Review

We established 54 cases with thrombosis and ID/IDA in the literature. The children and adults were almost equally affected (48.1% children, 51.8% adult), female/male ratio being 1.2 in children, 3.6 in adults. Veins were affected more than the arteries both in children and adults (73.1% and 53.6% respectively). Cerebral veins were occluded in 100% and 66.6% of the children and adults with thrombosis respectively. All the occluded non-cerebral veins in adults were retinal veins. The most common occluded arteries were the cerebral ones in children (85.7%) and non-cerebral arteries in adults (76.9%) mostly involving carotid artery (Tables 2 & 3). The rates of overall involvement of cerebral vessels in children and adults were 96.2% and 46.4% of all occlusions respectively (Tables 2 & 3). Nine out of 50 (18%) cases in the literature who were evaluated for other prothrombotic risk factors [3-15,17-40] had at least one risk factor like decreased protein S, Factor V Leiden, prothrombin G20210A mutations, increased Factor VIII, fibrinogen, lipoprotein a, cholesterol, anticardiolipin antibody, d-dimer, PAI, thrombin antithrombin complex levels and hemoglobin (Hb) S trait. Additionally four cases had patent foramen ovale.

Table 2: Characteristics of the patients in the literature who developed thrombosis and have underlying iron deficiency anemia.

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Abbreviations (Alphabetic order): ACA: Anti cardiolipin antibody, Abbreviations (Alphabetic order): ACA: Anti cardiolipin antibody, AMA: Anti-mitochondrial antibody, ANA: Antinuclear antibody, ANCA: Anti neutrophil cytoplasmic, antibody, Anti ds DNA: Anti deoxyribonucleic acid, ASA: acetylsalicylic acid, APA: Antiphospholipid antibody, ANCA: Antineutrophil cytoplasmic antibody, aPTT: Activated partial thromboplastin time, ATIII: Anti-thrombin III, CA-125: Cancer antigen 125, CRP: C-reactive protein, CSF: Cerebrospinal fluid, CT: Computerized tomography, ECG:Electrocardiogram, F: Factor , FDP: Fibrin degradation products, fer: Ferritin, G6PD: Glucose-6-Phosphate Dehydrogenase; HDL: High-density lipoprotein, Hb: Hemoglobin (g/dl), IDA: Iron deficiency anemia, INR: International normalized ratio, JAK-2: Janus kinase 2, LA: Lupus anticoagulant ; LDL: Low-density lipoprotein, LMWH: low molecular weight heparin, M: Male, MCV: Mean corpuscular volume, MHTFR: Methylene tetrahydrofolate reductase enzyme; MPL: Thrombopoietin receptor, MRA: Magnetic resonance angiography, MRI: magnetic resonans imaging, N: Normal, NA: Not available, PAI-1: Plasminogen activator inhibitor-1, PFO: Patent foramen ovale, PNH: Paroxysmal nocturnal hemoglobinuria, Pr C: Protein C, Pr S: Protein Santigen, PT: Prothrombin time, Prt: Prothrombin; RF: Rheumatoid factor, RistCoF: Ristocetin co factor, Sedim: Erythrocyte sedimentation rate, SI: Serum iron (µg/dl), tPA: Tissue plasminogen activator, TAT: Thrombin Antithrombin Complex, throm: thrombocytes, TIBC: Total iron binding capacity (µg/dl), TEE:Transesophageal echocardiogram, TS: Transferrin saturation(%) TSH: Thyroid stimulating hormone, TT: Thrombin time, UIBC: Unsaturated iron binding capacity, USG: Ultrasonography, VB12: Vitamin B12, vWF A: von Willebrand factor antigen, W: women.

Table 3: Characteristics of 54 patients in the literature developing thrombosis on the basis of iron deficiency anemia (Summary).

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° : Female/Male/Total; ϫ 1/6 had a coexistent thrombus in the atrium, *Thrombosis of retinal artery, **All are thrombosis of retinal vein, ***6/10 are thrombosis of carotid artery, one of them being coexistent with another thrombosis in the ventricle, 3/10 are thrombosis of aorta, 1/10 is thrombosis of retinal artery

Forty one out of 54 cases (75.9%) had at least one associated condition like infections (n:13), menorrhagia (n:10), gastrointestinal disorder like diverticulosis, rectal prolapsus, hemorrhoids (n:3), gastrointestinal hemorrhage (n:3), myoma uteri (n:3), dehydratation (n:2), oncologic problems like adenomyosis, endometriosis and myeloid metaplasia (n:2), papilledema (n:2), anorexia nervosa (n:1), nephrotic syndrome (n:1), migraine (1), retinal hemorrhage (n:1), bronchial asthma (n:1), alcoholism (n:1) (Table 2). All the 13 cases with concomitant infection were children all of whom had cerebral vessel occlusions, the majority involving the cerebral veins (n:9). The six had gastroenteritis, the three had otitis media, and the rest had various infections [3-15, 17-40] (Table 2).

Discussion

In this study, we presented two patients with cerebral thrombosis and IDA that were followed in our clinic and reviewed the literature. Of the 54 thrombosis cases with ID/IDA in the literature, cerebral thrombosis made up of 70.4% of all the cases, venous cerebral occlusions comprising 100% and 66% of venous thrombosis in children and adults respectively. Our report highlights the importance of prevention and early treatment of ID/ IDA, especially in children. That, the frequency of ID/IDA in our patients with thrombosis (11.8%, Table 2) was lower than that in the literature (15-29%) [42] may be related to limited number of cases in our cohort. Our first case emphasizes the importance of preceeding/concomitant otitis media or mastoiditis as prothrombotic risk factors which were reported to accompany 24- 62% of cerebral sinovenous thrombosis cases in children, among various infections [43]. The role of reactive thrombocytosis in the pathogenesis of thrombosis in ID/IDA is controversial [5,7,8,44,45]. However, the reduced cell deformability caused by microcytosis in ID/IDA causes hypercoagulation [3,7,45] through increasing blood viscosity and disrupting the normal blood flow pattern [3]. Concomitant dehydration, metabolic stress and infections increase metabolic demand of tissues, especially those of the basal ganglia, thalamus, hypothalamus [3,45], leading to anemic hypoxia and therefore venous thrombosis [7]. Endothelial damage develops [46- 48] due to increase in oxidants [49] and reduction of antioxidants [49-53, 54] in ID/IDA, although controversial results are also available [55] and because of turbulant flow, which is a result of vasodilation and increased blood viscosity [17], thereby stimulating thrombocyte aggregation and thrombosis. However the effect of IDA on thrombocyte aggregation is controversial [46,56,57]. On the other hand, increased plasminogen activator inhibitor [58] was also reported. Whether clotting time is shortened and coagulation factors are increased like in other disorders like hemodilution [58], hemorrhagic shock [59] require further studies.

The idea that ID/IDA is a predisposing factor for thrombosis is relatively new. Our recent study with thromboelastography showed that IDA patients had a tendency to hypercoagulation [41]. That none of these patients had developed thrombosis suggested that additional thrombophilia factors may be required for development of thrombosis. The accompaniment of additional prothrombotic risk factors in our patients and those in the literature, although in various rates, support this hypothesis. Indeed, Stolz et al. showed that severe anemia is an independent risk factor for cerebral venous thrombosis only when it is together with hypercholesterolemia and thrombophilia [1]. The main limitation of our study is that iron parameters were considered as prerequisite prothrombotic factors to be evaluated only after 2014 in our clinic; so only 17 cases could be evaluated. Incomplete search of additional prothrombotic risk factors of the cases in the literature are the limitations of the literature review.

Conclusion

Iron deficiency anemia or ID is a prothrombotic factor, as reported previously [60,61]. Two of our cases and 54 cases in the literature revealed coexistence of ID/IDA and thrombosis. Involvement of cerebral vessels in the majority of cases in childhood is striking. Further investigations are required to evaluate the role of additional prothrombotic risk factors in thrombosis that develops in ID/IDA patients.

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