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Azar JM, Lambert R, Maffei FA, Thomas TA. Late-onset vitamin K deficiency presenting as haemorrhagic shock and severe multi-system organ failure. BMJ Case Rep 2024; 17:e261126. [PMID: 39122381 DOI: 10.1136/bcr-2024-261126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/12/2024] Open
Abstract
Vitamin K is an essential dietary cofactor required for the synthesis of active forms of vitamin K-dependent procoagulant proteins. Vitamin K deficiency, particularly late-onset deficiency occurring between 1 week and 6 months of age, can cause a life-threatening bleeding disorder. An exclusively breastfed, full-term, 6-week-old infant male presented with severe haemorrhagic shock and multi-system organ failure related to caregiver refusal of intramuscular vitamin K after birth. Coagulation studies were normalised within 8 hours of intramuscular vitamin K administration. An increasing number of caregivers are refusing intramuscular vitamin K which has led to a rise in the incidence of vitamin K deficiency bleeding. Health policy organisations around the world emphasise the benefits of intramuscular vitamin K and risks of refusal, particularly in exclusively breastfed infants who are at higher risk due to low vitamin K levels in breast milk. This case highlights the multi-system severity of this life-threatening yet preventable disorder.
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Affiliation(s)
- Justin M Azar
- Janet Weis Children's Hospital, Danville, Pennsylvania, USA
- Pediatrics, Geisinger Commonwealth School of Medicine, Scranton, Pennsylvania, USA
| | - Richard Lambert
- Janet Weis Children's Hospital, Danville, Pennsylvania, USA
- Pediatrics, Geisinger Commonwealth School of Medicine, Scranton, Pennsylvania, USA
| | - Frank Anthony Maffei
- Janet Weis Children's Hospital, Danville, Pennsylvania, USA
- Pediatrics, Geisinger Commonwealth School of Medicine, Scranton, Pennsylvania, USA
| | - Tessy A Thomas
- Janet Weis Children's Hospital, Danville, Pennsylvania, USA
- Pediatrics, Geisinger Commonwealth School of Medicine, Scranton, Pennsylvania, USA
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Perrone S, De Bernardo G, Lembo C, Dell'Orto V, Giordano M, Beretta V, Petrolini C, Gambini L, Toni AL, Parigi G, Fontanarosa I, Natale MP, D'Amato G, Sordino D, Buonocore G. Vitamin K insufficiency and the prophylaxis strategy in term healthy infants: A multicentre study. Eur J Clin Invest 2024; 54:e14141. [PMID: 38071415 DOI: 10.1111/eci.14141] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 11/10/2023] [Accepted: 11/23/2023] [Indexed: 03/13/2024]
Abstract
BACKGROUND/AIM Late vitamin K deficiency bleeding (VKDB) during early infancy is a serious problem worldwide. Vitamin K (VK) deficiency commonly occurs in newborns who are exclusively breastfed. Protein Induced by VK Absence (PIVKA-II) has been identified as an early indicator of subclinical VK deficiency in neonates, surpassing prothrombin time. To assess PIVKA-II levels at 48 h, 1 and 3 months of age in full-term newborns who were exclusively breastfed and received varying VKDB prophylaxis regimens. METHODS A prospective observational study was conducted in four hospitals, enrolling 105 newborns. PIVKA-II levels were measured using a sandwich-type enzyme-linked immunosorbent assay. RESULTS At 48 h of age, there was no significant difference in PIVKA-II concentrations between newborns who received intramuscular administration of 1 mg of phylloquinone (VK1) and those who received oral administration of 2 mg of VK1 at birth. At 1 and 3 months of life, infants who received any supplementation regimen between 2 and 14 weeks exhibited significantly lower PIVKA-II concentrations compared to infants who received only 1 mg of intramuscular VK1 at birth. The prophylaxis involving a dose of 1 mg of intramuscular VK1 at birth followed by oral administration of 150 μg/day of VK1 from the 2nd to the 14th week of life showed the lowest PIVKA-II blood concentrations. CONCLUSIONS Oral supplementation of VK1 after discharge significantly reduced PIVKA-II concentrations in exclusively breastfed term infants. These findings suggest the importance of oral VK1 supplementation in exclusively breastfed infants during their first 3 months of life to avoid the risk of VK insufficiency.
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Affiliation(s)
- Serafina Perrone
- Neonatology Unit, Department of Medicine and Surgery, University of Parma, Pietro Barilla Children's Hospital, Parma, Italy
| | - Giuseppe De Bernardo
- Division of Pediatrics Neonatology and NICU, Ospedale Buon Consiglio Fatebenefratelli, Naples, Italy
| | - Chiara Lembo
- Department of Neonatology, APHP, Necker-Enfants Malades Hospital, Paris, France
| | - Valentina Dell'Orto
- Neonatology Unit, Department of Medicine and Surgery, University of Parma, Pietro Barilla Children's Hospital, Parma, Italy
| | - Maurizio Giordano
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
| | - Virginia Beretta
- Neonatology Unit, Department of Medicine and Surgery, University of Parma, Pietro Barilla Children's Hospital, Parma, Italy
| | - Chiara Petrolini
- Neonatology Unit, Department of Medicine and Surgery, University of Parma, Pietro Barilla Children's Hospital, Parma, Italy
| | - Lucia Gambini
- Neonatology Unit, Department of Medicine and Surgery, University of Parma, Pietro Barilla Children's Hospital, Parma, Italy
| | | | | | | | | | | | - Desiree Sordino
- Department of Emergency, NICU, A.O.R.N. Santobono-Pausillipon, Naples, Italy
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Öztürk B, Yaradilmiş RM, Azapağasi E, Öztürk Z, Fettah A, Tuygun N. Attention to diseases that re-emerge due to refusal of vitamin K: an infant case. Blood Coagul Fibrinolysis 2023; 34:118-121. [PMID: 36719808 DOI: 10.1097/mbc.0000000000001169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Intramuscular vitamin K injection is recommended for all newborns to prevent bleeding. However, the number of parents who reject vitamin K is at an increase. We present a 1-month girl who presented with haemorrhagic shock due to extraordinary intra-thoracic bleeding. The patient was treated with thoracentesis and blood transfusion. Parents were informed the about the benefits of Vitamin K and they were convinced to continue a routine immunization programme.
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Affiliation(s)
- Betül Öztürk
- Department of Pediatric Emergency, University of Health Sciences, Dr Sami Ulus Maternity and Children's Education and Research Hospital
| | - Raziye Merve Yaradilmiş
- Department of Pediatric Emergency, University of Health Sciences, Dr Sami Ulus Maternity and Children's Education and Research Hospital
| | - Ebru Azapağasi
- Department of Pediatric Intensive Care, Gazi University Faculty of Medicine
| | | | - Ali Fettah
- Department of Pediatric Hematology-Oncology, University of Health Sciences, Dr Sami Ulus Maternity and Children's Education and Research Hospital, Ankara, Turkey
| | - Nilden Tuygun
- Department of Pediatric Emergency, University of Health Sciences, Dr Sami Ulus Maternity and Children's Education and Research Hospital
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Volpe JJ. Vitamin K deficient bleeding and COVID-19: How are they related? J Neonatal Perinatal Med 2021; 14:313-316. [PMID: 34486992 DOI: 10.3233/npm-210732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- J J Volpe
- Department of Neurology, Harvard Medical School, Boston, MA, USA.,Department of Pediatric Newborn Medicine, Harvard Medical School, Boston, MA, USA
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Al-Zuhairy SH. Late vitamin K deficiency bleeding in infants: five-year prospective study. J Pediatr (Rio J) 2021; 97:514-519. [PMID: 33064995 PMCID: PMC9432021 DOI: 10.1016/j.jped.2020.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/14/2020] [Accepted: 09/15/2020] [Indexed: 12/02/2022] Open
Abstract
OBJECTIVE To study the presenting clinical and demographic features, risk factors, and outcome of infants with late vitamin K deficiency bleeding. METHODS Over a 5-year study period, the presenting clinical features and outcome of all 47 infants observed aged less than 6 months, who were diagnosed with late-onset primary and secondary VKDB by detailed history, physical examination, and laboratory findings were evaluated. Confirmed primary late VKDB was diagnosed when no cause other than breastfeeding could be found, while in the secondary subtype additional risk factors compromising the vitamin K effect were diagnosed. RESULTS Secondary late VKDB (83%, 39 patients) was more common than the primary subtype. The mean age of patients was 10.50 ± 5.75 and 9.74 ± 6.04 weeks in primary and secondary VKDB subtypes, respectively, and the age of infants did not have a significant difference (p > 0.05). The male to female ratio was 2.13:1. The residency, place and mode of delivery, gestational age, and types of feeding of patients did not have a significant difference between VKDB subtypes. The skin and gastrointestinal tract (GIT) (40.4%) followed by intracranial hemorrhage (ICH) (32%), were common sites of bleeding. Neurological complications were seen in 21% of patients; however, lethality was 23%, and the outcome of patients did not have a significant difference (p > 0.05) between VKDB subtypes. CONCLUSION Secondary late VKDB is more common than the primary subtypes, and late VKDB is still a serious disease in developing countries, including Iraq, when vitamin K prophylaxis isn't routinely used at birth.
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Coley EJL, Hsiao EY. Malnutrition and the microbiome as modifiers of early neurodevelopment. Trends Neurosci 2021; 44:753-764. [PMID: 34303552 DOI: 10.1016/j.tins.2021.06.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 05/23/2021] [Accepted: 06/11/2021] [Indexed: 01/16/2023]
Abstract
Malnutrition refers to a dearth, excess, or altered differential ratios of calories, macronutrients, or micronutrients. Malnutrition, particularly during early life, is a pressing global health and socioeconomic burden that is increasingly associated with neurodevelopmental impairments. Understanding how perinatal malnutrition influences brain development is crucial to uncovering fundamental mechanisms for establishing behavioral neurocircuits, with the potential to inform public policy and clinical interventions for neurodevelopmental conditions. Recent studies reveal that the gut microbiome can mediate dietary effects on host physiology and that the microbiome modulates the development and function of the nervous system. This review discusses evidence that perinatal malnutrition alters brain development and examines the maternal and neonatal microbiome as a potential contributing factor.
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Affiliation(s)
- Elena J L Coley
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA 90095, USA.
| | - Elaine Y Hsiao
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA 90095, USA
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Lembo C, Buonocore G, Perrone S. The challenge to define the optimal prophylactic regimen for vitamin K deficiency bleeding in infants. Acta Paediatr 2021; 110:1113-1118. [PMID: 32892390 DOI: 10.1111/apa.15566] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/28/2020] [Accepted: 08/31/2020] [Indexed: 12/15/2022]
Abstract
Infants are at risk of vitamin K deficiency that may lead to vitamin K deficiency bleeding (VKDB). Although many vitamin K prophylactic regimens have been developed throughout the years, still cases of late form VKBD may occur. The introduction of combined prophylactic strategy with prolonged oral prophylaxes after the intramuscular dose at birth has showed a decrease of the late severe VKDB incidence. Nevertheless, there is still lack of consensus about the administration scheme after the first dose at birth. CONCLUSION: Late form VKBD is not eradicated, and the best prophylactic regimen in term and preterm infants is still an open debate.
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Affiliation(s)
- Chiara Lembo
- Department of Molecular and Developmental Medicine University of Siena Siena Italy
| | - Giuseppe Buonocore
- Department of Molecular and Developmental Medicine University of Siena Siena Italy
| | - Serafina Perrone
- Department of Medicine and Surgery University of Parma Parma Italy
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Enz R, Anderson RS. A Blown Pupil and Intracranial Hemorrhage in a 4-Week-Old: A Case of Delayed Onset Vitamin K Deficiency Bleeding, a Rare "Can't Miss" Diagnosis. J Emerg Med 2016; 51:164-7. [PMID: 27301668 DOI: 10.1016/j.jemermed.2015.06.089] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 06/05/2015] [Indexed: 11/25/2022]
Abstract
BACKGROUND Infants are at risk for vitamin K deficiency bleeding (VKDB) because of limited stores of vitamin K (VK) at birth and a low concentration of VK in human breast milk. Therefore, the administration of intramuscular (IM) VK at birth has been recommended since 1961 in the United States. Infants who do not receive IM VK and who are exclusively breast-fed are at increased risk for VKDB. While VKDB is rare, a common presentation of late onset VKDB is intracranial hemorrhage. CASE REPORT We report the case of a 4-week-old infant who presented to the emergency department with lethargy and a grossly dilated right pupil. The parents denied trauma. A computed tomography scan revealed a right-sided subdural hematoma with midline shift. The infant's international normalized ratio was >10.9 and his prothrombin time PT was >120 seconds. VK was administered and the child was transferred to a tertiary care center for emergent neurosurgery. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: The difficult part of making this critical diagnosis is considering it. Any bleeding in a newborn without trauma should prompt inquiry regarding neonatal VK administration and a serum prothrombin time level. Fortunately, once the diagnosis is made, therapy in the emergency department can be lifesaving and is familiar to emergency physicians. Treatment parallels usual care for the adult with excess anticoagulation caused by warfarin. Prompt intravenous VK is universally accepted. Studies to support fresh frozen plasma or prothrombin complex concentrate are lacking but make good clinical sense for life-threatening bleeding.
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Affiliation(s)
- Ryley Enz
- Department of Emergency Medicine, Maine Medical Center, Portland, Maine
| | - Robert S Anderson
- Department of Emergency Medicine, Maine Medical Center, Portland, Maine
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Unal E, Ozsoylu S, Bayram A, Ozdemir MA, Yilmaz E, Canpolat M, Tumturk A, Per H. Intracranial hemorrhage in infants as a serious, and preventable consequence of late form of vitamin K deficiency: a selfie picture of Turkey, strategies for tomorrow. Childs Nerv Syst 2014; 30:1375-82. [PMID: 24752706 DOI: 10.1007/s00381-014-2419-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Accepted: 04/07/2014] [Indexed: 11/24/2022]
Abstract
PURPOSE Vitamin K deficiency bleeding is one of the most common causes of acquired hemostatic disorder in early infancy. Although vitamin K is practiced routinely after every birth in Turkey, children with type of vitamin K deficiency bleedings (L-VKDB) can be encountered. We aimed to evaluate the clinical features of the children with L-VKDB reported from Turkey. METHODS Between 1995 and 2013, 48 studies reporting 534 children with L-VKDB were evaluated in this study. RESULTS Of the 534 reported children (178 girls, 356 boys), 486 (91 %) were extremely breastfed. The most common bleeding sites were intracranial hemorrhage, gastrointestinal, and umbilical in 414 (77.4 %), 33 (6.2 %), and 33 (6.2 %) children, respectively, and 35 (6.6 %) children had been diagnosed incidentally without any bleeding. The etiology of 399 (74.7 %) children were classified as idiopathic, whereas 135 (25.3 %) were secondary. Intramuscular vitamin K was administered in 248 (46.4 %), not administered in 228 (42.7 %), and the administration of vitamin K were not determined in 58 (10.9 %) children. The outcomes of Turkish cohort showed that 111 (20.8) children died, 257 (48.1 %) cases developed neurologic deficit (mainly epilepsy and psychomotor retardation), and only 166 (31.1 %) patients recovered without squeal. CONCLUSIONS The compliance of prophylactic measures in Turkey does not seem to be satisfactory. As a further measure of tomorrow, we vigorously emphasize that a national surveillance program may be initiated. An additional intramuscular dose or oral supplementation of vitamin K especially for exclusively breast-fed infants may reduce this catastrophic problem in our country.
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Affiliation(s)
- Ekrem Unal
- Department of Pediatrics, Division of Pediatric Hematology and Oncology, Faculty of Medicine, Erciyes University, 38039, Talas, Kayseri, Turkey
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Affiliation(s)
- Joseph J Volpe
- Department of Neurology, Harvard Medical School, Boston Children's Hospital, Boston, Massachusetts.
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Chen TY, Wang HK, Yeh ML, Wei SH, Lu K. Subdural hemorrhage as a first symptom in an infant with a choledochal cyst: case report. J Neurosurg Pediatr 2012; 9:414-6. [PMID: 22462707 DOI: 10.3171/2011.12.peds11279] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Choledochal cysts are not rare in East Asia. The classic symptoms of these cysts are intermittent abdominal pain, jaundice, and a right upper quadrant abdominal mass. The authors report the case of an infant with a choledochal cyst presenting with intracranial hemorrhage. This 2-month-old girl with a partial coma presented at the authors' hospital. A brain CT scan revealed right-sided subdural hemorrhage. The routine preoperative survey found coagulopathy. After correcting the bleeding disorder, an emergency craniectomy was performed. Further examination found a choledochal cyst during abdominal ultrasonography and CT. Choledochal cysts are a cause of neonatal cholestasis but rarely produce vitamin K deficiency bleeding.
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Affiliation(s)
- Te-Yuan Chen
- Department of Neurosurgery, E-Da Hospital, I-Shou University, Kaohsiung, Taiwan.
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Ozdemir MA, Karakukcu M, Per H, Unal E, Gumus H, Patiroglu T. Late-type vitamin K deficiency bleeding: experience from 120 patients. Childs Nerv Syst 2012; 28:247-51. [PMID: 21928065 DOI: 10.1007/s00381-011-1575-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Accepted: 08/31/2011] [Indexed: 10/17/2022]
Abstract
BACKGROUND Deficiency of vitamin K predisposes to early, classic, or late vitamin K deficiency bleeding (VKDB), of which late VKDB may be associated with serious and life-threatening intracranial bleeding. Late VKDB is characterized with intracranial bleeding in infants aged 2-24 weeks due to severe vitamin K deficiency, occurring primarily in exclusively breast-fed infants. Late VKDB is still an important cause of mortality and morbidity in developing countries. MATERIALS AND METHODS We presented 120 cases of late VKDB, which were evaluated at Erciyes University Medical Faculty Hospital between June 1990 and June 2006. RESULTS Signs and symptoms of the patients were bulging fontanels (70%); irritabilities (50%); convulsions (49%); bleeding and ecchymosis (47%); feeding intolerance, poor sucking, and vomiting (46%); diarrhea (34%); jaundice (11%); and pallor (9%), and among these infants, 21% received medication before the diagnosis (10%, antibiotics; 3%, simethicone; 4%, paracetamol; and 4%, phenobarbital). Intracranial hemorrhage in 88 (73%) patients has been observed. The hemorrhage was subdural in 34 (28%) cases, intracerebral in 28 (23%), subarachnoid in 17 (14%), intraventricular in 9 (8%), intracerebral and subdural in 12 (10%), subdural and subarachnoid in 6 (5%), and combination of intracerebral, subdural, and intraventricular in 14 (12%), and the mortality rate was 31%. CONCLUSION Although late VKDB leads to significant morbidity and mortality, it can be avoided by providing vitamin K prophylaxis to all newborns. Administration of vitamin K (1 mg) at birth can prevent intracranial bleeding and other hemorrhagic manifestations.
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Affiliation(s)
- Mehmet Akif Ozdemir
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Faculty of Medicine, Erciyes University, Talas, Kayseri, Turkey
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Abstract
UNLABELLED Abusive Head Trauma (AHT) refers to the combination of findings formerly described as shaken baby syndrome. Although these findings can be caused by shaking, it has become clear that in many cases there may have been impact trauma as well. Therefore a less specific term has been adopted by the American Academy of Pediatrics. AHT is a relatively common cause of childhood neurotrauma with an estimated incidence of 14-40 cases per 100,000 children under the age of 1 year. About 15-23% of these children die within hours or days after the incident. Studies among AHT survivors demonstrate that approximately one-third of the children are severely disabled, one-third of them are moderately disabled and one-third have no or only mild symptoms. Other publications suggest that neurological problems can occur after a symptom-free interval and that half of these children have IQs below the 10th percentile. Clinical findings are depending on the definitions used, but AHT should be considered in all children with neurological signs and symptoms especially if no or only mild trauma is described. Subdural haematomas are the most reported finding. The only feature that has been identified discriminating AHT from accidental injury is apnoea. CONCLUSION AHT should be approached with a structured approach, as in any other (potentially lethal) disease. The clinician can only establish this diagnosis if he/she has knowledge of the signs and symptoms of AHT, risk factors, the differential diagnosis and which additional investigations to perform, the more so since parents seldom will describe the true state of affairs spontaneously.
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Imaging of Neonatal Child Abuse with an Emphasis on Abusive Head Trauma. Magn Reson Imaging Clin N Am 2011; 19:791-812; viii. [DOI: 10.1016/j.mric.2011.08.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Abstract
Hemorrhagic stroke in children occurs more frequently than is commonly appreciated. There are important differences in the factors associated with hemorrhagic stroke in children when compared with adults. These differences likely play a role in the different outcomes, which tend to worsen with age. In this review, we describe the estimated frequency, clinical presentation, acute management of hemorrhagic stroke, and an overview of rehabilitation techniques. We identify key topics for future basic and clinical research. Findings from future studies will help improve our ability to optimize treatment for and long-term rehabilitation of these patients.
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Affiliation(s)
- Warren Lo
- Department of Pediatrics and Neurology, The Ohio State University, Nationwide Children’s Hospital, Columbus, Ohio
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Ediz L, Hiz O, Meral I, Alpayci M. Complex regional pain syndrome: A vitamin K dependent entity? Med Hypotheses 2010; 75:319-23. [DOI: 10.1016/j.mehy.2010.03.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2010] [Accepted: 03/13/2010] [Indexed: 12/21/2022]
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