Eight years previously, the patient had an episode of fever, with raised inflammatory markers that persisted for 12 weeks. He underwent evaluation for cancer and infection, including tuberculosis, but no cause was identified. Joint pains subsequently developed, and he had a positive antinuclear antibody test, at a low titer; he was treated with oral glucocorticoids over a period of 2 months, with resolution of his symptoms. He no longer took any medications. He was born in the United Kingdom to Indian parents, lived with his wife in London, and worked as a management consultant. He traveled to India occasionally; the last trip was 4 years earlier. He had never smoked, had minimal alcohol intake, and noted no risk factors for human immunodeficiency virus (HIV) infection. His father had died of an aggressive natural killer cell leukemia. There was no family history of autoimmune or clotting disorders.
Clinical examination confirmed a temperature of 38.2°C, but the patient appeared well. The blood pressure was 125/64 mm Hg, and the pulse was 92 beats per minute and regular. Heart sounds were normal, and chest sounds were clear. There was no hepatosplenomegaly, lymphadenopathy, abdominal tenderness, or mass. He was alert and oriented, with no weakness or sensory deficits. There was no rash and no joint erythema or swelling.
The white-cell count was 2500 per cubic millimeter, with 62% (1540) neutrophils, 22% (560) lymphocytes, 15% (380) monocytes, <1% basophils, and <1% eosinophils. The hemoglobin level was 11.5 g per deciliter, and the platelet count 107,000 per cubic millimeter. The reticulocyte count was 0.3% (normal range, 0.5 to 1.5). The prothrombin time was 14.2 seconds (normal range, 9.6 to 11.6), and the activated partial-thromboplastin time was 75.4 seconds (normal range, 24 to 32), with a corrected value of 61.3 seconds on mixing with normal plasma. The serum sodium level was 127 mmol per liter, potassium 3.9 mmol per liter, blood urea nitrogen 8.1 mg per deciliter (2.9 mmol per liter), and creatinine 1.2 mg per deciliter (106 μmol per liter). Liver-function tests and the serum amylase level were normal. The erythrocyte sedimentation rate was 88 mm in the first hour, and the C-reactive protein was 0.8 mg per deciliter (normal value, <0.5). Blood cultures were obtained.
Tests for antinuclear antibodies and anti-dsDNA antibodies were positive, both at a titer of 1:320. Tests for anti-Sm, anti-Ro, and anti-La antibodies were negative. The C3 level was 0.54 g per liter (normal value, >0.7), and the C4 level was 0.07 g per liter (normal value, >0.16). Testing for the lupus anticoagulant was positive. A test for anticardiolipin IgG antibodies was reported to be moderately positive, and a test for IgM antibodies was negative. Urine sediment and serum creatinine levels remained normal.
It was performed another diagnostic tests. What would be your diagnose and your management?
You came the next day to watch your patient results and find these information (the lab results that you ordered are underligned) :
The patient was treated with intravenous amoxicillin and clavulanate but continued to have spiking fevers daily, with peak temperatures of more than 38.5°C. Over the next 2 days, headaches, confusion, and muscle cramps developed, as well as proteinuria (1.78 g of protein per liter), and he was transferred to a tertiary care hospital. Chest radiography and magnetic resonance imaging of the brain showed no abnormalities. A lumbar puncture revealed normal opening pressure. Cerebrospinal fluid protein and glucose levels were normal, and no cells were seen on microscopy. CT imaging of the chest, abdomen, and pelvis showed no abnormalities. The platelet count fell to 12,000 per cubic millimeter, and the neutrophil count to 290 per cubic millimeter.
Blood and urine cultures were negative, as were serologic tests for HIV types 1 and 2, human T-cell lymphotrophic virus, hepatitis B virus, hepatitis C virus, varicella–zoster virus, herpes simplex virus, Coxiella burnetii, brucella, mycoplasma, Chlamydophila psittaci, legionella, and toxoplasma. Polymerase-chain-reaction assays for respiratory syncytial virus, influenza virus, parvovirus B19, CMV, EBV, human herpesvirus 6, and human herpesvirus 8 were negative, as was an enzyme-linked immunosorbent spot assay for tuberculosis.
The serum ferritin level was 105,506 μg per liter (normal range in men, 30 to 400), fasting triglycerides 494 mg per deciliter (5.58 mmol per liter; normal value, <177 [<2]), and fibrinogen 0.98 g per liter (normal range, 1.8 to 3.6). Repeated blood and urine cultures were sterile. Bone marrow aspiration and trephine biopsy revealed macrophage proliferation and phagocytosis of hematopoietic cells of erythroid, myeloid, and megakaryocytic lineages.
With all these information what would be your diagnose?
The serum ferritin level was 105,506 μg per liter (normal range in men, 30 to 400), fasting triglycerides 494 mg per deciliter (5.58 mmol per liter; normal value, <177 [<2]), and fibrinogen 0.98 g per liter (normal range, 1.8 to 3.6). Repeated blood and urine cultures were sterile. Bone marrow aspiration and trephine biopsy revealed macrophage proliferation and phagocytosis of hematopoietic cells of erythroid, myeloid, and megakaryocytic lineages.
Treatment with intravenous methylprednisolone (1 g daily for 3 days) and intravenous immune globulin (2 g per kilogram of body weight over a period of 2 days) was initiated, and the antimicrobial regimen was broadened to include intravenous meropenem and acyclovir, with oral fluconazole as antifungal prophylaxis. The patient was given red-cell and platelet transfusions. The fever subsided, but the pancytopenia persisted, and he had ongoing difficulties with attention and short-term memory. Mycophenolate mofetil (1 g twice daily) was added, with subsequent improvement in his cytopenias and cognitive function.
The patient's glucocorticoid treatment was gradually tapered, and he was discharged from the hospital while taking oral prednisolone and mycophenolate mofetil. At the time of discharge, his white-cell count and hematocrit were normal; he had mild thrombocytopenia, which resolved over the next 6 weeks. The patient's condition steadily improved, and all immunosuppressive treatment was progressively withdrawn over the next 2 years. He has resumed full-time work and remained well at a 3-year follow-up visit.
SLE is frequently associated with fever and with cytopenias. Both findings may reflect underlying disease activity, but additional causes should be considered if these manifestations are severe or prolonged. In this patient, the combination of relentless fever and severe, rapidly progressive pancytopenia suggested overwhelming infection or secondary hemophagocytic syndrome. The poor response to antimicrobial agents and the very high ferritin levels prompted bone marrow examination, which confirmed secondary hemophagocytic syndrome.
Secondary hemophagocytic syndrome, sometimes known as the macrophage activation syndrome, can present at any age and is a rare complication of infection, hematologic cancer, drug exposure (particularly exposure to immunomodulatory drugs), and autoimmune disease. The most common infectious trigger is EBV, but HIV is increasingly implicated, and many other viral, bacterial, and protozoal infections have also been associated with secondary hemophagocytic syndrome.1,2
Of the autoimmune diseases associated with the hemophagocytic syndrome in adults, SLE is by far the most common, accounting for about 60% of cases; the estimated prevalence of the hemophagocytic syndrome among patients with SLE is up to 2.4%.3,4 Adult-onset Still's disease is responsible for 10 to 15% of cases.4,5 There is considerable overlap between the features of adult-onset Still's disease and those of secondary hemophagocytic syndrome, and the possibility of hemophagocytosis should be considered in any patient with adult-onset Still's disease in whom cytopenias develop.6
The mechanisms underlying secondary hemophagocytic syndrome are poorly understood. However, studies indicate that some cases are associated with heterozygous mutations and polymorphisms in the genes responsible for familial hemophagocytic lymphohistiocytosis, a primary disorder that usually presents in infancy.7-9 The identified mutations are associated with defective killing by cytotoxic lymphocytes and natural killer cells, and it is postulated that defective clearance of antigen or antigen-presenting cells leads to persistent stimulation of the immune response and a consequent cytokine storm, resulting in many of the manifestations of this condition.10 High levels of interleukin-1, interleukin-6, TNF, and interferon-γ cause fever, up-regulate ferritin transcription and secretion, and induce cytopenias through myelosuppression rather than through the phagocytosis that is the morphologic hallmark of the disorder.11
There are no validated diagnostic criteria for secondary hemophagocytic syndrome, but suggestive features include high temperatures, organomegaly, cytopenias and coagulopathy, markedly elevated ferritin levels, hypertriglyceridemia, and hypofibrinogenemia. Bone marrow examination usually shows hemophagocytosis, but this finding may initially be absent or confined to other organs, such as the spleen or lymph nodes.12
Data from clinical trials are lacking to guide decisions about specific therapy in adults, and management of secondary hemophagocytic syndrome is based on control of the cytokine storm, treatment of possible triggers, and supportive care. In patients with associated autoimmune diseases, immunosuppression may be indicated. Reports on case series have described good outcomes in patients treated with a variety of immunosuppressive agents, including glucocorticoids (the most commonly used agents for this condition), cyclophosphamide, cyclosporine, and intravenous immune globulin3,13; the use of etoposide, biologic agents, and plasmapheresis has been reported in refractory cases.11 Caution must be exercised in prescribing immunosuppressive therapy, since infectious triggers are identified in more than 50% of these patients,5 and concurrent antimicrobial therapy should be considered.
In three case series of adults with autoimmune diseases and secondary hemophagocytic syndrome, mortality rates ranged from 7 to 38%.3-5 Reported predictors of death included a C-reactive protein level greater than 5 mg per deciliter, a platelet count below 50,000 per cubic millimeter, the presence of infection, and prior use of glucocorticoids. Our patient had severe thrombocytopenia but did not have other features associated with a poor prognosis.
This case highlights the importance of considering additional possibilities when findings are atypical for an established condition. Once a diagnosis of SLE had been made, the crucial next step was to recognize that the ongoing fevers and pancytopenia indicated another diagnosis, secondary hemophagocytic syndrome. Rapid identification of this life-threatening complication of SLE facilitated early aggressive management and resulted in a good clinical outcome.
The serum ferritin level was 105,506 μg per liter (normal range in men, 30 to 400), fasting triglycerides 494 mg per deciliter (5.58 mmol per liter; normal value, <177 [<2]), and fibrinogen 0.98 g per liter (normal range, 1.8 to 3.6). Repeated blood and urine cultures were sterile. Bone marrow aspiration and trephine biopsy revealed macrophage proliferation and phagocytosis of hematopoietic cells of erythroid, myeloid, and megakaryocytic lineages.
With all these information what would be your diagnose?
The serum ferritin level was 105,506 μg per liter (normal range in men, 30 to 400), fasting triglycerides 494 mg per deciliter (5.58 mmol per liter; normal value, <177 [<2]), and fibrinogen 0.98 g per liter (normal range, 1.8 to 3.6). Repeated blood and urine cultures were sterile. Bone marrow aspiration and trephine biopsy revealed macrophage proliferation and phagocytosis of hematopoietic cells of erythroid, myeloid, and megakaryocytic lineages.
Treatment with intravenous methylprednisolone (1 g daily for 3 days) and intravenous immune globulin (2 g per kilogram of body weight over a period of 2 days) was initiated, and the antimicrobial regimen was broadened to include intravenous meropenem and acyclovir, with oral fluconazole as antifungal prophylaxis. The patient was given red-cell and platelet transfusions. The fever subsided, but the pancytopenia persisted, and he had ongoing difficulties with attention and short-term memory. Mycophenolate mofetil (1 g twice daily) was added, with subsequent improvement in his cytopenias and cognitive function.
The patient's glucocorticoid treatment was gradually tapered, and he was discharged from the hospital while taking oral prednisolone and mycophenolate mofetil. At the time of discharge, his white-cell count and hematocrit were normal; he had mild thrombocytopenia, which resolved over the next 6 weeks. The patient's condition steadily improved, and all immunosuppressive treatment was progressively withdrawn over the next 2 years. He has resumed full-time work and remained well at a 3-year follow-up visit.
Commentary
This case highlights two important and related causes of fever and pancytopenia: SLE and the hemophagocytic syndrome. The features that prompted consideration of SLE in this patient were fever, abdominal pain suggestive of serositis, proteinuria, and pancytopenia. The presence of antinuclear antibodies, anti-dsDNA antibodies, and the lupus anticoagulant confirmed the diagnosis.SLE is frequently associated with fever and with cytopenias. Both findings may reflect underlying disease activity, but additional causes should be considered if these manifestations are severe or prolonged. In this patient, the combination of relentless fever and severe, rapidly progressive pancytopenia suggested overwhelming infection or secondary hemophagocytic syndrome. The poor response to antimicrobial agents and the very high ferritin levels prompted bone marrow examination, which confirmed secondary hemophagocytic syndrome.
Secondary hemophagocytic syndrome, sometimes known as the macrophage activation syndrome, can present at any age and is a rare complication of infection, hematologic cancer, drug exposure (particularly exposure to immunomodulatory drugs), and autoimmune disease. The most common infectious trigger is EBV, but HIV is increasingly implicated, and many other viral, bacterial, and protozoal infections have also been associated with secondary hemophagocytic syndrome.1,2
Of the autoimmune diseases associated with the hemophagocytic syndrome in adults, SLE is by far the most common, accounting for about 60% of cases; the estimated prevalence of the hemophagocytic syndrome among patients with SLE is up to 2.4%.3,4 Adult-onset Still's disease is responsible for 10 to 15% of cases.4,5 There is considerable overlap between the features of adult-onset Still's disease and those of secondary hemophagocytic syndrome, and the possibility of hemophagocytosis should be considered in any patient with adult-onset Still's disease in whom cytopenias develop.6
The mechanisms underlying secondary hemophagocytic syndrome are poorly understood. However, studies indicate that some cases are associated with heterozygous mutations and polymorphisms in the genes responsible for familial hemophagocytic lymphohistiocytosis, a primary disorder that usually presents in infancy.7-9 The identified mutations are associated with defective killing by cytotoxic lymphocytes and natural killer cells, and it is postulated that defective clearance of antigen or antigen-presenting cells leads to persistent stimulation of the immune response and a consequent cytokine storm, resulting in many of the manifestations of this condition.10 High levels of interleukin-1, interleukin-6, TNF, and interferon-γ cause fever, up-regulate ferritin transcription and secretion, and induce cytopenias through myelosuppression rather than through the phagocytosis that is the morphologic hallmark of the disorder.11
There are no validated diagnostic criteria for secondary hemophagocytic syndrome, but suggestive features include high temperatures, organomegaly, cytopenias and coagulopathy, markedly elevated ferritin levels, hypertriglyceridemia, and hypofibrinogenemia. Bone marrow examination usually shows hemophagocytosis, but this finding may initially be absent or confined to other organs, such as the spleen or lymph nodes.12
Data from clinical trials are lacking to guide decisions about specific therapy in adults, and management of secondary hemophagocytic syndrome is based on control of the cytokine storm, treatment of possible triggers, and supportive care. In patients with associated autoimmune diseases, immunosuppression may be indicated. Reports on case series have described good outcomes in patients treated with a variety of immunosuppressive agents, including glucocorticoids (the most commonly used agents for this condition), cyclophosphamide, cyclosporine, and intravenous immune globulin3,13; the use of etoposide, biologic agents, and plasmapheresis has been reported in refractory cases.11 Caution must be exercised in prescribing immunosuppressive therapy, since infectious triggers are identified in more than 50% of these patients,5 and concurrent antimicrobial therapy should be considered.
In three case series of adults with autoimmune diseases and secondary hemophagocytic syndrome, mortality rates ranged from 7 to 38%.3-5 Reported predictors of death included a C-reactive protein level greater than 5 mg per deciliter, a platelet count below 50,000 per cubic millimeter, the presence of infection, and prior use of glucocorticoids. Our patient had severe thrombocytopenia but did not have other features associated with a poor prognosis.
This case highlights the importance of considering additional possibilities when findings are atypical for an established condition. Once a diagnosis of SLE had been made, the crucial next step was to recognize that the ongoing fevers and pancytopenia indicated another diagnosis, secondary hemophagocytic syndrome. Rapid identification of this life-threatening complication of SLE facilitated early aggressive management and resulted in a good clinical outcome.
2 comentarios:
Mi impresión es un linfoma no Hodgkin (LNH), por la historia de fiebres intercurrentes, la edad, la leucopenia (posible infiltración de MO), sudoración nocturna profusa, etc. Llama la atención la falta de hallazgos ganglionares positivos al examen físico. Dolor en abdomen superior izquierdo sin hepatoesplenomegalia... ¿No tiene imágenes?. Por otro lado, llama la atención el episodio aislado de fiebre, poliartralgias y elevación de reactantes 8 años antes del episodio actual: la respuesta "dramática" del cuadro a los esteroides podría hablar de una poliartritis paraneoplásica en este contexto (me imagino que la VSG no estuvo por encima de 40 mm/h todo el tiempo...); los ANAS y los anti-dsDNA podrían estar falsamente elevados en este contexto (el LES en hombres de edad media, por lo general debuta con compromiso renal, sin embargo, este diagnóstico cabe dentro de los diferenciales) . Tiene algún componente de trombocitopenia, alteración de los tiempos de coagulación e hiponatremia. Me parece que primero hay que descartar un compromiso tumoral esplénico, buscar adenopatías parahiliares, descartar alteraciones citogenéticas, solicitar VIH, CVH (más relacionado con linfoma marginal esplénico o de células vellosas), CMV, EBV. Después de esto, se definiría si se realiza o no una biopsia ganglionar (en caso de encontrarse un ganglio sospechoso) o de MO.
Saludos.
Dx: Síndrome hemofagocítico, antiguamente denominado "reticulosis medular histiocítica"; puede ser reactivo, secundario a una infección, en cuyo caso es una condición benigna y autolimitada, o maligno, manifestándose como un proceso rápidamente progresivo, y por lo común, fatal, que requiere manejo temprano con quimioterapia. Posiblemente, por el antecedente de leucemia "agresiva" en el padre, este paciente pudo realmente tener una linfohistiocitosis eritrofágica familiar, la variante genética del síndrome (de pronóstico sombrío).
En caso de ser un síndrome hemofagocítico asociado a enfermedad maligna, se divide en dos grupos:
* Aquel que antecede la manifestación o se desarrolla durante el tratamiento de una LLA, MM, tumores de células germinales, timoma, etc.
* Aquel que enmascara una neoplasia hematolinfoide, bien sea una leucemia de células T/NK (¿diagnóstico paterno?) o un LNH, como fue planteado en un principio.
Se recomienda suspender inmunosupresores (como esteroides) en los casos en que el paciente los esté recibiendo.
Leí también algo sobre el síndrome de activación de macrófagos, que hace parte del espectro de síndromes hemofagocíticos adquiridos, mas frecuentemente en pacientes con artritis idiopática sistémica de aparición juvenil, que pueden cursar con marcadores inmunocelulares (ANAS, Anti-dsDNA +), representando el 7% del total de casos, con una mortalidad entre el 10 y el 20%. Dentro de las neoplasias que posteriormente estos pacientes podrían desarrollar, se encuentra el linfoma de células gigantes anaplásicas como uno de los más comunes, cuyo manejo usualmente implica terapia CHOP (ciclofosfamida, doxorubicina, vincristina, prednisona/prednisolona). La clínica usualmente involucra fiebre prolongada, hepatoesplenomegalia y adenopatías (ausentes en este caso). En el laboratorio, citopenias, alteraciones de la coagulación (aumento de fibrinógeno y prolongación de TP y TTP), aumento de triglicéridos, de LDH, de ferritina, de AST-ALT, del receptor CD25 soluble, etc.
Finalmente, vale la pena recordar que no solo las infecciones, sino también muchos procesos como anemias hemolíticas autoinmunes, la anemia falciforme y múltiples fármacos (dentro de los que se destacan inmunosupresores) pueden llevar al desarrollo de un síndrome hemofagocítico reactivo.
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