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Journal of Medical Cases

Case Report

Volume 11, Number 11, November 2020, pages 352-354

Acute Lymphoblastic Leukemia Following Incomplete Kawasaki Disease

Kawasaki disease (KD) was initially described by Tomisaku Kawasaki in 1967. It was, also called mucocutaneous lymph node syndrome. It is characterized by fever, cervical lymphadenopathy, rash, non-purulent conjunctival injection, lip and mouth changes (strawberry tongue and fissured lips), and inflammation in palms and feet [1].

Although KD is the main cause of childhood acquired heart disease, its etiology is still unknown. The treatment of choice is intravenous immunoglobulin (IVIG) in one dose of 2 g/kg and acetylsalicylic acid [2].

Different clinical presentations, severity and complications have been identified through the years since 1967, as well as the association with other pathologies such as autoimmune disorders, inborn errors of immunity and less frequently oncological diseases. Association of autoimmune diseases and cancer is well established and can develop in the course of the disease or related to immunosuppressive treatment [3, 4].

An 11-month-old male diagnosed with incomplete KD after 4 days of fever, polymorphic rash in chest and abdomen (Fig. 1), bilateral conjunctivitis with purulent discharge and left cervical adenopathy, irritability and hyporexia.

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Figure 1. Polymorphic erythema predominantly in the chest and abdomen in patient with diagnosis of KD. KD: Kawasaki disease.

Laboratories revealed hemoglobin (Hb) 9.5 g/dL, leukocytes 18,730/mm³, neutrophils 2,720/mm³ (14.5%), lymphocytes 15,300/mm³, platelets 405,000/mm³, erythrocyte sedimentation rate (ESR) 50 mm/h, C-reactive protein (CRP) 25.8 mg/dL, lumbar puncture without alterations. He was started on IVIG (2 g/kg) and aspirin 30 mg/kg/day with remission of fever and inflammatory markers at 24 h. The echocardiogram did not find coronary abnormalities.

Four weeks after the diagnosis he developed fever, daily, 3 - 4 episodes of 38.5 °C, rhinorrhea, bullous pharyngitis, right otitis media, hyporexia, vomiting and irritability. He received treatment with acyclovir and an unspecified antibiotic. Laboratories showed Hb 7.3 g/dL, leukocytes 36,890/mm³, neutrophils 730/mm³ (2%), lymphocytes 34,470/mm³, platelets 237,000/mm³, blasts 38%, ESR 61 mm/h, CRP 4.8 mg/dL, ferritin 325.67 ng/mL, fibrinogen 449 mg/dL, procalcitonin 0.09 ng/dL, albumin 3.8 g/dL, lactate dehydrogenase (LDH) 408 U/L, aspartate aminotransferase (AST) 27 U/L, alanine aminotransferase (ALT) 7 U/L, total bilirubin 0.16 mg/dL. Because of the persistent symptoms and abnormal cell blood count a bone marrow aspiration was performed, in which 90% blasts were found (Fig. 2). He started treatment with prednisone 60 mg/m² and high-risk leukemia protocol. A diagnosis of acute lymphoblastic leukemia (ALL) Pro-B, of high-risk by age, deoxyribonucleic acid (DNA) index 1.1 with 12:21 translocation was established. Cerebrospinal fluid and echocardiogram were reported normal.

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Figure 2. Hypercellular bone marrow with proliferation of immature L1/L2 lymphoblast precursor cells (arrows) with morphological classification of FAB (90%). Sparse cytoplasm, fine chromatin with prominent nucleoli in cells. FAB: French-American-British.

KD is a febrile vasculitis disorder which is usually diagnosed by a cluster of signs and symptoms along with supporting laboratory findings. It is a multisystem disorder, with predilection for small and medium sized arteries, especially coronary arteries. If left untreated, it can lead to various complications like coronary artery aneurysm, thrombosis, stenosis and even sudden death.

Diagnosis can be made with the established criteria of persistent fever for 5 days with additional at least four of the five following symptoms: bilateral conjunctival injection, changes in lips and oral mucosa, polymorphous exanthema, cervical lymphadenopathy, usually unilateral, changes in hands and feet: erythema, edema and desquamation. The American Heart Association and the American Academy of Pediatrics recommend a combination of aspirin and IVIG for treating acute KD.

Autoimmune diseases have been associated with the presence of solid or hematological malignancies [3]. The levels of soluble interleukin 2 (IL-2), tumor necrosis factor (TNF), cluster of differentiation 4 (CD4), CD8, arachidonic acid, free radicals, accelerated proliferation of differentiated fibroblasts in regions of repeated epithelial aggression, as well as viral infections, epigenetic changes, immunosuppression and DNA damage induce cell proliferation, apoptosis resistance, angiogenesis, transformation and mutagenesis [5-8].

Yu et al reported a cohort of 75,123 patients with autoimmune diseases in Taiwan from 1997 to 2012, where 3.78% developed cancer [9]. Rheumatoid arthritis was the largest group with 46.8%, systemic lupus erythematosus 27.8%, Sjogren’s syndrome 15.9%, and ectopic kidney (EK), which represented 4.61%. They found a higher overall risk for women and ages younger than 20 years. Of the 3,469 patients with KD, the average age was 3 years, 11 patients (0.31%) developed cancer, with a female/male ratio of 0.56 and an incidence of 34.7/100,000 people. The 11 patients were under 20 years old and were diagnosed with non-Hodgkin lymphoma in five patients, bone tumors and soft tissue sarcomas in four, and leukemias in two of them. The highest risk of developing cancer in autoimmune diseases including KD was during the first year of follow-up, they were predominantly males, with a time of onset of malignancy between 4 weeks and 24 years [9].

The literature describes cases of acute leukemia that occur after KD. Murray et al reported a 3-year-old boy with complete KD, he was treated with IVIG and aspirin, however 10 weeks later he developed bruises, paleness and hepatosplenomegaly. Bone marrow examination demonstrated for ALL [10]. Suzuki et al reported a 2-year-old boy with complete KD, he was treated with IVIG and aspirin. Seven weeks later he developed petechiae in lower extremities and hepatosplenomegaly. Examination of the bone marrow demonstrated of ALL of the high risk [11]. Nakamura et al reported a child who died 3 weeks after the acute phase of KD, the cause of death being acute leukemia [12, 13]. Recently Lee et al reported an 11-month-old male with incomplete KD with mildly-dilated coronary arteries. He was treated with IVIG. He presented anemia and recurred 2 weeks later with leukocytosis, a bone marrow examination demonstrated acute megakaryocytic leukemia [14]. In a patient with monocytic leukemia, KD-like was diagnosed 1 week after the start of chemotherapy, with an echocardiogram showing the presence of ectasia of the left coronary artery. He was treated with IVIG and steroids with remission of symptoms [15].

KD is a vasculitis where processes of inflammation and autoimmunity intervene. Association with oncological disease has been shown predominantly in male children. Therefore, it is important in a patient who has criteria for KD, which does not improve with the usual treatment or starts with atypical behavior of the disease or alterations in the cell count, consider a timely diagnostic approach to concomitant oncological diseases to improve the life expectancy of the patient.

Acknowledgments

None to declare.

Financial Disclosure

None to declare.

Conflict of Interest

None to declare.

Informed Consent

Informed consent was obtained.

Author Contributions

MG, JV, and JG were the treating physicians and the monitoring of the hematological disease. EV wrote the manuscript with the support of ET, MG and GP supervised the project. All authors discussed the results and contributed to the writing of the final manuscript.

Data Availability

Any inquiries regarding supporting data availability of this study should be directed to the corresponding author.

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