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Mesaroli G, Hundert A, Birnie KA, Campbell F, Stinson J. Screening and diagnostic tools for complex regional pain syndrome: a systematic review. Pain 2021; 162:1295-1304. [PMID: 33230004 PMCID: PMC8054537 DOI: 10.1097/j.pain.0000000000002146] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 11/03/2020] [Accepted: 11/05/2020] [Indexed: 11/25/2022]
Abstract
ABSTRACT Complex regional pain syndrome (CRPS) is a severely painful condition that presents with a constellation of symptoms. The understanding of the pathophysiology of CRPS has evolved over time, as have the diagnostic criteria. Our primary objective was to identify screening and diagnostic tools for CRPS and summarize their feasibility, measurement properties, and study quality. A secondary objective was to identify screening and diagnostic tools used for CRPS in pediatric populations (0-21 years of age). A systematic review of English articles in electronic databases (PsycINFO, MEDLINE, Embase, CINAHL, CENTRAL, and Web of Science) was conducted with the aid of a librarian in November 2018 and updated in July 2020. Studies were included if the tool was a screening or diagnostic tool, the tool included self-report or physical examination, and the primary objective of the study was to evaluate the measurement properties or feasibility of use. For each study, data were extracted for quality indicators using the QUADAS-2 tool. No screening tools were identified. Four diagnostic tools were identified: the Veldman criteria, International Association for the Study of Pain criteria, Budapest Criteria, and Budapest Research Criteria. There are no diagnostic tools validated for use in pediatric CRPS. Because there are no extant screening tools for CRPS, all people with suspected disease should undergo rapid diagnostic assessment by a clinician. For adults, the Budapest Criteria are the preferred diagnostic tool. Future research is recommended to develop a diagnostic tool for pediatric populations and screening tools for both pediatric and adults.
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Affiliation(s)
- Giulia Mesaroli
- The Hospital for Sick Children, Department of Rehabilitation, and the University of Toronto, Department of Physical Therapy, Toronto, ON, Canada
| | - Amos Hundert
- The Hospital for Sick Children, Child Health Evaluative Sciences, Toronto, ON, Canada
| | - Kathryn A. Birnie
- Department of Anesthesiology, Perioperative and Pain Medicine, University of Calgary, Alberta Children's Hospital, Calgary, AB, Canada
| | - Fiona Campbell
- Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Jennifer Stinson
- The Hospital for Sick Children, Child Health Evaluative Sciences and the University of Toronto, Lawrence S. Bloomberg Faculty of Nursing, Toronto, ON, Canada
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Systemic Intravenous Lidocaine for the Treatment of Complex Regional Pain Syndrome: A Case Report and Literature Review. Am J Ther 2017; 23:e1266-9. [PMID: 26398854 DOI: 10.1097/mjt.0000000000000345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Complex regional pain syndrome (CRPS) was described in 1864 by Mitchell et al as a condition characterized by many unique symptoms. Although symptoms may differ from patient to patient, the most common complaints are painful swelling in upper or lower extremities or changes in the skin. CRPS has been given many different names since it was first mentioned in the literature in 1851. The most common alternative names include causalgia, aglodystrophy, and sympathetic dystrophy syndrome. This condition is generally diagnosed in older adults because of trauma, nerve damage, and coronary artery disease; however, there are cases of CRPS affecting the pediatric and young adult population. The fourth edition of the diagnostic and treatment guidelines of CRPS published by Harden et al in 2013 suggest many different pharmacologic treatment options for these patients. Intravenous lidocaine is used to block the sodium channels in neuronal membranes, thus stopping initiation and conduction of impulses associated with neuropathic and inflammatory pain. The use of regional intravenous lidocaine (by applying a tourniquet on the affected extremity) has been well-documented in the literature with a successful decrease in pain symptoms. A unique case of the use of systemic intravenous lidocaine will be presented.
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Weissmann R, Uziel Y. Pediatric complex regional pain syndrome: a review. Pediatr Rheumatol Online J 2016; 14:29. [PMID: 27130211 PMCID: PMC4850724 DOI: 10.1186/s12969-016-0090-8] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 04/25/2016] [Indexed: 11/15/2022] Open
Abstract
Complex regional pain syndrome (CRPS) is a chronic, intensified localized pain condition that can affect children and adolescents as well as adults, but is more common among adolescent girls. Symptoms include limb pain; allodynia; hyperalgesia; swelling and/or changes in skin color of the affected limb; dry, mottled skin; hyperhidrosis and trophic changes of the nails and hair. The exact mechanism of CRPS is unknown, although several different mechanisms have been suggested. The diagnosis is clinical, with the aid of the adult criteria for CRPS. Standard care consists of a multidisciplinary approach with the implementation of intensive physical therapy in conjunction with psychological counseling. Pharmacological treatments may aid in reducing pain in order to allow the patient to participate fully in intensive physiotherapy. The prognosis in pediatric CRPS is favorable.
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Affiliation(s)
- Rotem Weissmann
- Pediatric Rheumatology Unit, Department of Pediatrics, Meir Medical Center, 49 Tshernichovsky St., Kfar Saba, 44281 Israel ,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yosef Uziel
- Pediatric Rheumatology Unit, Department of Pediatrics, Meir Medical Center, 49 Tshernichovsky St., Kfar Saba, 44281, Israel. .,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.
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Abstract
PURPOSE OF REVIEW Complex regional pain syndrome (CRPS) is a chronic pain condition typically involving a limb, which is characterized by neuropathic pain, sensory abnormalities and neurovascular findings. The exact cause of CRPS is unknown; however, proposed theories include alterations in the sympathetic and central nervous system (CNS), small fibre changes in the peripheral nervous system and psychological factors. Although this condition was previously considered rare among children and adolescents, it has been increasingly recognized in paediatric patients and can result in significant disability. RECENT FINDINGS The diagnosis of paediatric CRPS is based upon clinical criteria obtained from a thorough history and physical examination. Other possible causes, such as orthopaedic, infectious, vascular and rheumatologic disorders, should be ruled out prior to making the diagnosis. Treatment focuses on a rehabilitative strategy consisting of physical therapy, occupational therapy and cognitive-behavioural therapy with an overall focus on return to functioning. SUMMARY CRPS in children and adolescents is characterized by a painful, mottled appearing, swollen limb with allodynia and hyperalgesia. For most patients, pain is severe, resulting in significant functional disability. More recent evidence suggests that a rehabilitative programme results in improvement in both pain and functional measures.
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Brooke V, Janselewitz S. Outcomes of Children With Complex Regional Pain Syndrome After Intensive Inpatient Rehabilitation. PM R 2012; 4:349-54. [DOI: 10.1016/j.pmrj.2012.01.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Revised: 01/21/2012] [Accepted: 01/27/2012] [Indexed: 10/28/2022]
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Back SK, Kim MA, Kim HJ, Lee J, Sung B, Yoon Y, Na HS. Developmental characteristics of neuropathic pain induced by peripheral nerve injury of rats during neonatal period. Neurosci Res 2008; 61:412-9. [PMID: 18538429 DOI: 10.1016/j.neures.2008.04.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2008] [Revised: 04/18/2008] [Accepted: 04/25/2008] [Indexed: 10/22/2022]
Abstract
To gain an insight into the developmental characteristics of neuropathic pain induced by peripheral nerve injury during neonatal period, we employed three groups of rats suffering from peripheral nerve injury at different postnatal times, and compared the onset time, severity and persistency of neuropathic pain behaviors, such as mechanical and cold allodynia. The first group (P0 group) was subjected to partial injury of tail-innervating nerves within 24 h after birth, the second group (P10 group) underwent nerve injury at postnatal day (P) 10, and the third group (P60 group) was subjected to injury at P60. Although mechanical allodynia was readily detectable in the P60 group even 1 day after nerve injury, the signs of neuropathic pain were observed from 6 or 8 weeks after nerve injury in the P0 or P10 groups, respectively. Compared with the P60 group, the P0 group showed more robust mechanical and cold allodynia, whereas the P10 group exhibited rather milder pains. In addition, while the P0 and P60 groups showed long-lasting signs of mechanical allodynia, the P10 group exhibited shorter persistency. These results indicate that peripheral nerve injury during neonatal period leads to neuropathic pain with distinct developmental characteristics later in life.
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Affiliation(s)
- Seung Keun Back
- Medical Science Research Center and Department of Physiology, Korea University College of Medicine, 126-1 Anam-dong 5 Ga, Seongbuk-Gu, Seoul 136-705, Republic of Korea
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Abstract
This review summarizes current information about diagnosis and treatment of complex regional pain syndrome (CRPS) in children. Although it has been widely held that CRPS in children is intrinsically different from adults, there appear to be relatively few differences. However, there is a marked preponderance of lower extremity cases in children. Historically, psychological factors have been invoked to explain the genesis and persistence of CRPS in children, but the evidence is not compelling. Treatment outcome studies are limited but indicate that children generally respond to a primary focus on physical therapy. Multidisciplinary treatment reports are particularly encouraging. The general perception that children have a milder course may relate to the potentially greater willingness of children to actively participate in appropriately targeted treatment rather than to innate differences in the disease process itself. Recurrence rates appear higher than in adults, but response to reinitiation of treatment seems to proceed efficiently. Clinical judgment dictates the extent of medication or interventional therapy added to the treatment to facilitate rehabilitation. In many ways, the approach to the treatment of children mirrors that of adults, with perhaps greater restraint in the use of medications and invasive procedures. The rehabilitation of children with CRPS, like that of adults with CRPS, needs further rigorous investigation.
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Affiliation(s)
- Robert T Wilder
- Mayo Clinic Mayo Eugenio Litta Children's Hospital, Rochester, MN 55902, USA.
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Maillard SM, Davies K, Khubchandani R, Woo PM, Murray KJ. Reflex sympathetic dystrophy: a multidisciplinary approach. ACTA ACUST UNITED AC 2004; 51:284-90. [PMID: 15077274 DOI: 10.1002/art.20249] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Susan M Maillard
- Great Ormond Street Hospital for Children NHS Trust, London, United Kingdom.
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Abstract
Idiopathic musculoskeletal pain syndromes in children have a variety of manifestations; they can be diffuse or well localized, constant or intermittent, with or without autonomic symptoms and signs, completely incapacitating or not limiting activities, and they can tax the physician's diagnostic skill. A careful history and examination is usually all that is needed to make a diagnosis, although the differential diagnosis is large and might require laboratory and radiographic investigation. Pain and functional assessment help track the progress with therapy. Intense exercise therapy is associated with the best outcome. Psychologic issues should be evaluated to determine if further psychologic intervention is indicated. The medium-term outcome is probably good for most of these children, but the long-term prognosis is unknown. One must be aware that other manifestations of psychologic problems might emerge. By the time these children and their families see the rheumatologist they are desperate and can be frustrating to work with due to their difficulty in accepting any kind of psychologic element to the pain and its associated disability. Nevertheless, it is rewarding to help the children understand and work through their pain so they can resume normal lives.
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Affiliation(s)
- David D Sherry
- Department of Pediatrics, University of Pennsylvania, 3101 Walnut Street, Philadelphia, PA 19104, USA.
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Abstract
Reflex sympathetic dystrophy is a syndrome characterized by pain in one or more extremities, usually associated with vasomotor changes. Its occurrence in childhood has long been thought to be rare. We describe six cases of pediatric reflex sympathetic dystrophy and suggest that this syndrome could be underdiagnosed in children and adolescents. Psychologic problems frequently play a role in this disorder, which often can be treated conservatively. We also point out that the diagnosis is mainly clinical. An early diagnosis can avoid unnecessary tests and potentially can improve response to treatment, and prognosis.
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Affiliation(s)
- R Cimaz
- Pediatric Department, University of Milan, Italy.
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Abstract
The authors describe a 12-year old girl with a painful syndrome at the distal side of the left leg, resulting in limping, incapacity and severe muscle atrophy. Full investigation - no inflammatory laboratory signs, diffuse osteoporosis at the left leg, decreased bone mineral content at the same place, marked hypofixation on bone and vascular scintigraphy - suggested pseudodystrophy (5), which is often induced by psychological factors. Successful treatment was obtained by physiotherapy, hydrotherapy, slight doses of NSAID and psychological assistance. With regard to recent literature, the authors believe that reflex sympathetic dystrophy (RSD) in children is often over-diagnosed, since there are no recognised criteria for diagnosing RSD. Besides the clinical picture, changes on radiography (focal osteoporosis) and on scintigraphy (disturbed vascular scintigraphy with increased pooling in the initial phase and hyperfixation on bone scintigraphy) are necessary. When these are not available, pseudodystrophy is a more correct diagnosis.
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Affiliation(s)
- P Herregods
- Dept of Physical Medicine and Rehabilitation, Middleheim Hospital, Antwerp, Belgium
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Abstract
The aim of this study was to determine if peripheral nerve injury in neonatal rats triggers neuropathic pain behaviors as it does in adults. The injury was produced in three groups of neonatal rats (1, 2, and 3 weeks old) by tightly ligating the left L5 and L6 spinal nerves. Behavioral tests for mechanical allodynia were conducted from the 15th day after birth for the 1- and 2-week groups, and 1 day after surgery for the 3-week group. Rats in the 3-week group developed behaviors representing mechanical allodynia as is seen in adults. For the younger animals, however, the signs of mechanical allodynia lasted for a shorter period of time. These data suggest that a factor which is critically important for the maintenance of neuropathic pain develops between the 2nd and 3rd postnatal weeks.
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Affiliation(s)
- D H Lee
- Marine Biomedical Institute, University of Texas Medical Branch, Galveston 77555-1069, USA
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Abstract
The reflex sympathetic dystrophy syndrome is a very common, poorly recognized syndrome which is associated with marked disability in some cases. The historical aspects, current ideas about the pathogenesis and pathophysiology, clinical features and staging are discussed. Early recognition and appropriate intervention are the cornerstone of successful treatment and are also discussed.
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Affiliation(s)
- A A Borg
- Nevill Hall Hospital, Abergavenny, Gwent, UK
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Koman LA, Barden A, Smith BP, Pollock FE, Sinal S, Poehling GG. Reflex sympathetic dystrophy in an adolescent. FOOT & ANKLE 1993; 14:273-7. [PMID: 8349213 DOI: 10.1177/107110079301400507] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The clinical course of an adolescent with reflex sympathetic dystrophy of the foot is presented. The potential problems of establishing objective diagnostic criteria for reflex sympathetic dystrophy are related to the dynamic nature of the disorder. Serial radiographic studies, radionuclide scans, and quantitative densitometric measurements may be useful in combination; isolated cold stress testing and laser Doppler fluxmetry are useful in assessing thermoregulation and vasomotor instability. A regimen of amitriptyline and phenytoin plus physical therapy with stress loading was useful in this patient, but in many patients the course is progressive, leading to chronic pain and debilitation.
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Affiliation(s)
- L A Koman
- Department of Orthopaedic Surgery, Bowman Gray School of Medicine of Wake Forest University, Winston-Salem, North Carolina 27157-1070
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Wesdock KA, Stanton RP, Singsen BH. Reflex sympathetic dystrophy in children. A physical therapy approach. ARTHRITIS CARE AND RESEARCH : THE OFFICIAL JOURNAL OF THE ARTHRITIS HEALTH PROFESSIONS ASSOCIATION 1991; 4:32-8. [PMID: 11188585 DOI: 10.1002/art.1790040107] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Children with reflex sympathetic dystrophy (RSD) almost always receive physical therapy as part of a multidisciplinary approach, but there is controversy about the efficacy of many alternative modalities. In a retrospective chart review of 24 females and 12 males with 49 episodes of RSD (mean age at onset, 13.4 years), the average time to correct diagnosis was 9.4 months (median, 4.2 months; range, 1-53 months). Sixteen ankles, 12 knees, eight wrists, two hips, and two shoulders were involved. Psychological assessments revealed significant abnormalities in 25 (83%) of 30 children evaluated. Thirty-four (94%) of 36 children received physical therapy including a wide variety of nonstandardized approaches. Children with one to two episodes of RSD averaged 4.0 physical therapy modalities; unresolved cases had 8.9 modalities attempted. Time from the first RSD episode to resolution averaged 9.0 months in 69% of children. Incorrect diagnoses prolonged many initial episodes; following correct diagnosis, symptom resolution occurred in 3.1 months. Recurrences are common, and 25% of children still exhibited RSD symptoms at last follow-up.
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Affiliation(s)
- K A Wesdock
- Department of Physical Therapy, Alfred I. duPont Institute, Wilmington, Delaware, USA
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Goldsmith DP, Vivino FB, Eichenfield AH, Athreya BH, Heyman S. Nuclear imaging and clinical features of childhood reflex neurovascular dystrophy: comparison with adults. ARTHRITIS AND RHEUMATISM 1989; 32:480-5. [PMID: 2706031 DOI: 10.1002/anr.1780320419] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Reflex neurovascular dystrophy (RND) is less common in children than in adults, and differences in onset, clinical course, response to treatment, and degree of disability suggest a different pathogenesis. We have assessed the usefulness of nuclear imaging in 15 children with RND who were evaluated from March 1983 to September 1985. Abnormal findings on 3-phase bone scans were observed in 14 children, with diffusely decreased bone uptake at the symptomatic site being the most common observation. This contrasts sharply with previous reports of diffusely increased uptake in most adults with RND.
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Affiliation(s)
- D P Goldsmith
- Pediatric Rheumatology Center, Children's Hospital of Philadelphia, PA 19104
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Abstract
We report 3 children with reflex sympathetic dystrophy syndrome, review the literature, and discuss current concepts of diagnosis and management. In this disorder, pain, tenderness, swelling, vasomotor instability, and dystrophic skin changes frequently develop after minor injury. The clinical diagnosis is supported by osteopenia detected on radiographs and either increased or decreased radionuclide uptake on bone scan of the affected extremity. Treatment with a graduated program of physical therapy and transcutaneous electrical nerve stimulation is beneficial in almost all patients. In contrast to adults, the prognosis of childhood reflex sympathetic dystrophy syndrome is favorable; most children recover completely after one episode.
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Affiliation(s)
- S Ashwal
- Department of Pediatrics, Loma Linda University School of Medicine, CA 92350
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Rush PJ, Wilmot D, Saunders N, Gladman D, Shore A. Severe reflex neurovascular dystrophy in childhood. ARTHRITIS AND RHEUMATISM 1985; 28:952-6. [PMID: 4026892 DOI: 10.1002/art.1780280818] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Laxer RM, Allen RC, Malleson PN, Morrison RT, Petty RE. Technetium 99m-methylene diphosphonate bone scans in children with reflex neurovascular dystrophy. J Pediatr 1985; 106:437-40. [PMID: 3156227 DOI: 10.1016/s0022-3476(85)80671-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Eleven children with reflex neurovascular dystrophy were investigated by technetium-labeled methylene diphosphonate bone scanning. Eight of 12 scans demonstrated abnormal findings, four showing diffusely decreased uptake and four diffusely increased uptake of the radionuclide in the affected site. Three scans showed normal findings initially, as did one previously abnormal scan when repeated in the asymptomatic patient 6 months later. Diffusely abnormal findings can be helpful in the diagnosis of childhood reflex neurovascular dystrophy, but a normal scan does not exclude the diagnosis.
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Buchta RM. Reflex sympathetic dystrophy in a 14-year-old female. JOURNAL OF ADOLESCENT HEALTH CARE : OFFICIAL PUBLICATION OF THE SOCIETY FOR ADOLESCENT MEDICINE 1983; 4:121-2. [PMID: 6863108 DOI: 10.1016/s0197-0070(83)80032-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Reflex sympathetic dystrophy (RSD) consists of an extremity with (1) burning or causalgic pain, (2) limitation of motion, (3) edema with or without pitting, (4) dystrophic skin changes, (5) vasomotor phenomena and (6) patchy osteoporosis on x ray. This disease is rare in adolescents, but of patients with RSD up to 8% are between 11 and 19 years of age. Most cases in this age group resolve after immobilization, analgesics or steroid therapy, surgical ganglionic blockade or sympathectomy. This case report is of a 14-year-old girl who was treated with all these measures, but continues to have significant residual deformity.
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Wettrell G, Hallböök T, Hultquist C. Reflex sympathetic dystrophy in two young females. ACTA PAEDIATRICA SCANDINAVICA 1979; 68:923-4. [PMID: 539417 DOI: 10.1111/j.1651-2227.1979.tb08237.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Reflex sympathetic dystrophy in paediatric patients is a rarely recognized pain syndrome probably of neurovascular origin. The manifectations in two young females consisted of disabling pain and localized hyperesthesia in lower extremities without evident trauma. Sympathetic block followed by active mobilization and, in the patient with atrophic changes, lumbar sympathectomy, resulted in complete recovery. Reflex sympathetic dystrophy should be considered in the differential diagnosis of pain and tenderness in an extremity.
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Abstract
Reflex neurovascular dystrophy has rarely been recognized in children. During the past eight years we have observed 24 instances of RND in 23 children. Lower extremity involvement was manifested in 20 of them and upper extremity in four. The major complaint was pain; swelling and vasomotor instability were prominent, and exquisite tenderness was characteristic. Chronic trophic changes were not observed. Antecedent illness or trauma could be related to the RND in less than half of the children, but personality factors appeared contributory to the development of RND in most children. Physical therapy was the principal form of treatment; therapy with a corticosteroid or by sympathetic blockade was not employed. Reduction in the evidences of disease, including improvement in function, were present in all children at the termination of therapy; improvement was maintained in all but one child after a mean period of 2.4 years. The excellent response to conservative therapy suggests that RND may be a more benign condition in children than in adults.
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