Sickle Cell Anemia: Screening, Symptoms and Urgent Signs

Klein, Thomas; Weber, Hans; Mitchell, Sarah

Que significa a anemia falciforme, e que non significa

A anemia falciforme adoita referirse á enfermidade HbSS, na que unha persoa herda dous xenes que producen hemoglobina S; os glóbulos vermellos poden volverse ríxidos, descompoñerse cedo e obstruír pequenos vasos. O trazo falciforme é diferente: un xene HbS adoita ser suficiente para transmitilo xeneticamente pero non para causar a anemia crónica e os episodios vasooclusivos recorrentes que se ven na HbSS.

A enfermidade falciforme é un termo xeral que inclúe HbSS, HbSC, HbS-beta-cero talasemia e HbS-beta-máis talasemia. A HbSS adoita causar a anemia máis pronunciada, pero a gravidade varía enormemente incluso dentro dunha familia; unha hemoglobina basal de 7,5 g/dL pode ser estable para un adulto e perigosa para outro se caeu rapidamente.

A mutación da hemoglobina S cambia un aminoácido na beta-globina: a valina substitúe ao ácido glutámico na posición 6. Baixo baixo osíxeno, deshidratación, acidosis ou febre, as moléculas de HbS poden polimerizarse dentro da célula. Ese cambio físico explica por que unha crise pode desenvolverse despois dun voo longo, unha enfermidade gastrointestinal ou unha noite de inxestión de líquidos escasa.

Kantesti AI é un Analizador de análises de sangue con IA que inclúe CBC, bilirrubina, LDH, reticulocitos, creatinina e resultados previos nunha vista lonxitudinal; non diagnostica a enfermidade falciforme só a partir dun CBC. Para un repaso práctico sobre a información da hemoglobina, véxase que significa HGB.

A 4 de setembro de 2026, aínda vexo pacientes aos que se lles di erróneamente que o trazo e a enfermidade son intercambiables. Non o son. A regra clínica do Dr. Thomas Klein é sinxela: pedir o xenotipo exacto da hemoglobina, non unha declaración vaga de que unha proba foi “positiva”.”

Por que o xenotipo cambia a atención

A HbSC pode ter unha hemoglobina máis alta que a HbSS e aínda causar complicacións retinianas, dor ou necrose avascular. A beta talasemia HbS pode parecerse ao trazo ou á HbSS dependendo de se a produción de beta-globina está parcialmente presente, por iso as probas moleculares ás veces resolven un patrón de electroforese ambiguo.

Síntomas da enfermidade falciforme por idade e liña base

Os síntomas da enfermidade falciforme inclúen comúnmente dor ósea ou torácica episódica, fatiga, ictericia, falta de aire, crecemento retardado e infeccións frecuentes, pero non dúas persoas experimentan o mesmo patrón. Os síntomas adoitan aparecer despois dos 4 a 6 meses de idade porque a hemoglobina fetal protexe inicialmente aos lactantes da polimerización da HbS.

A dactilite -inchazón dolorosa das mans ou dos pés- pode ser o primeiro signo visible en lactantes. En nenos en idade escolar, a dor abdominal merece especial atención porque o estreñimento, a colelitiasis, o aumento do bazo e a vaso-oclusión poden sentirse sorprendentemente similares na casa.

A ictericia na enfermidade falciforme reflicte a degradación continua dos glóbulos vermellos e a elevación da bilirrubina indirecta; non significa automaticamente hepatite. A orina escura, as feces pálidas, a coceira, a febre ou a dor na parte superior dereita do abdome cambian esa avaliación e requiren a avaliación de causas hepáticas e biliares; a nosa guía para patróns de bilirrubina directa explica a diferenza.

Os adultos poden normalizar a dor que gradualmente se volveu máis frecuente. Na miña experiencia, un cambio de dous episodios xestionados na casa ao ano a dous episodios ao mes é clinicamente significativo aínda que non aumentasen as visitas de emerxencia. A alteración do sono, o traballo perdido, os síntomas eréctiles, o estado de ánimo baixo e a redución da tolerancia ao exercicio deben documentarse porque a miúdo preceden a un cambio formal no tratamento.

Unha concentración de hemoglobina de 6 a 9 g/dL pode ser un rango habitual de estado de equilibrio na HbSS, mentres que un valor inferior a 10 g/dL sería inesperado na maioría das persoas sen enfermidade. O número importa, pero o cambio respecto á liña base persoal importa máis.

Quen debe considerar a proba de detección de portadores de anemia falciforme

O cribado de sickle cell é razoable antes do embarazo ou no embarazo temperán para calquera persoa cuxo estado de portador sexa descoñecido, independentemente da aparencia, apelido ou ascendencia asumida. O estado de portador é herdado e a miúdo permanece descoñecido ata unha proba de cribado neonatal ou unha proba de hemoglobina inesperadamente anormal.

If both biological parents carry an HbS-related or beta-thalassemia variant, each pregnancy can have a 25% chance of inheriting a clinically significant hemoglobin condition, depending on the variants involved. A carrier can have normal energy, normal CBC results, and no history of pain episodes.

Screening is particularly useful when one partner has HbAS, HbC trait, beta-thalassemia trait, unexplained microcytosis, or a family history of sickle cell disease. A low mean corpuscular volume should not be blamed on iron deficiency without checking ferritin and considering thalassemia; compare MCV and MCH clues.

A 2022 World Health Organization global report estimated that hemoglobin disorders remain a major inherited disease burden, particularly where newborn screening access is uneven. The most respectful approach is universal access to informed screening rather than using ethnicity as a gatekeeper.

Kantesti é un plataforma de interpretación de análise de sangue de IA that can explain a reported HbS result in plain language, but carrier confirmation and reproductive counseling require an accredited laboratory and clinician. If a couple is planning a pregnancy, ask whether partner testing and genetic counseling can happen before conception rather than after a result becomes time-sensitive.

Como a electroforese de hemoglobina confirma o diagnóstico

Hemoglobin electrophoresis separates hemoglobin fractions and is a core test for confirming sickle cell anemia or trait, often alongside high-performance liquid chromatography and, when needed, genetic testing. A routine CBC cannot confirm HbSS or trait because iron deficiency and thalassemia can produce overlapping red-cell indices.

In untreated HbSS, electrophoresis typically shows predominantly HbS with no HbA, although HbF percentage varies. HbAS usually shows both HbA and HbS, often with HbA higher than HbS; exact percentages can shift with co-inherited alpha-thalassemia or recent transfusion.

Recent transfusion can make an electrophoresis result misleading for roughly 3 months because donor HbA is still circulating. This is also why HbA1c can understate average glucose after transfusion or in high-turnover hemolysis; see when HbA1c misleads.

A peripheral smear may show target cells, polychromasia, and sickled forms, but microscopy supports rather than replaces fraction testing. Dr. Klein has seen “normal” emergency smears delay clarification when a patient had been transfused weeks earlier—always tell the laboratory and hematology team about transfusions.

Newborn screening methods identify HbS before clinical illness, but the result still needs timely confirmatory testing. The 2014 evidence-based guideline by Yawn et al. recommends specialist involvement early in life, with preventive measures beginning before the first major complication (Yawn et al., 2014).

A hemoglobina típica en adultos HbA predominates; no HbS Does not indicate HbS trait or sickle cell disease.

Sickle cell trait pattern HbA and HbS both present Usually carrier status; interpret with CBC and family history.

Possible sickle syndrome HbS predominates, HbA reduced or absent Requires genotype-specific interpretation and hematology review.

Post-transfusion uncertainty Mixed fractions after transfusion Repeat or use molecular testing; do not assign genotype from one pattern.

Seguimento sanguíneo rutinario: que monitorizan os clínicos

Routine monitoring in sickle cell disease usually trends hemoglobin, reticulocytes, white cells, platelets, bilirubin, LDH, kidney function, and urine protein—not one isolated result. The safest comparison is with the patient’s own stable baseline, ideally drawn when they are well and not recently transfused.

Hemolysis often produces elevated LDH, indirect bilirubin, and reticulocytes with low haptoglobin. Haptoglobin can be low for other reasons, including liver disease, so the combined pattern is stronger than any single marker; our guía de interpretación de haptoglobina mostra por que.

A reticulocyte percentage alone can overstate marrow response in significant anemia. Clinicians often calculate an absolute reticulocyte count or corrected reticulocyte response; a falling absolute count during worsening anemia raises concern for parvovirus B19-associated aplastic crisis.

Kantesti é un Ferramenta de análise de probas de sangue impulsada por IA that compares repeated hematology results rather than treating a high LDH as a standalone diagnosis. A sample flagged as hemolyzed in the tube can falsely increase potassium and LDH, so a surprising result may need a redraw; review repeat testing after hemolysis.

Hydroxyurea commonly increases MCV and HbF over time, while lowering neutrophils modestly at an effective dose. Those shifts may be expected, but an absolute neutrophil count below the individual treatment threshold or a rapidly falling platelet count requires prescriber review rather than self-adjusting medication.

Cando a dor é un episodio vaso-oclusivo, e cando non o é

Vaso-occlusive pain is often deep, severe, and located in the back, chest, hips, limbs, or abdomen, but new pain must not automatically be labelled a sickle crisis. Fever, focal swelling, injury, abdominal guarding, or one-sided neurologic symptoms point toward problems needing a different work-up.

A home pain plan typically includes early hydration, warmth, prescribed analgesia, rest, and a personal escalation threshold agreed with the sickle team. Drinking excessive volumes is not safer: people with kidney impairment or heart disease can develop fluid overload, especially during an acute illness.

Pain that remains uncontrolled after the usual rescue plan, prevents fluids or medicines being kept down, or is different in quality or location should prompt urgent clinical advice. A swollen, hot joint may represent septic arthritis or bone infection rather than uncomplicated vaso-occlusion; our unexplained pain testing guide outlines useful first investigations.

In emergency care, timely analgesia and reassessment matter more than proving pain severity through a laboratory number. NICE’s guideline on acute painful sickle episodes recommends rapid analgesia assessment and frequent review, because undertreatment itself contributes to prolonged distress and delayed recovery (NICE, 2012).

Avoid cold packs directly on an area of vaso-occlusive pain unless your team specifically advises them; cold can constrict peripheral vessels. That practical detail sounds minor, but many patients tell me nobody explained it until after several difficult episodes.

Síndrome torácica aguda: a emerxencia que moita xente pasa por alto

Acute chest syndrome is a new lung infiltrate on chest imaging plus respiratory symptoms, fever, chest pain, or low oxygen in a person with sickle cell disease, and it is an emergency. It can deteriorate quickly, sometimes after admission for a pain episode rather than at the moment chest symptoms begin.

Call emergency services or go to emergency care for new shortness of breath, chest pain, blue-gray lips, fainting, persistent cough with fever, or oxygen saturation below the person’s prescribed target. A saturation of 92% may be a major drop for someone normally at 98%, while some patients have a lower documented baseline; both the absolute value and change matter.

Acute chest syndrome may involve infection, fat embolization from bone marrow, pulmonary vascular obstruction, atelectasis, or several processes at once. Clinicians commonly assess oxygenation, CBC, reticulocytes, cultures when febrile, chest imaging, and sometimes blood gases; análises de sangue para a falta de aire adds context to these results.

In adults, oversedation from opioids, shallow breathing from pain, and excess intravenous fluid can worsen respiratory status. Incentive spirometry during hospitalization reduces pulmonary complications in selected painful episodes, though it is not a substitute for urgent assessment when symptoms have already started.

The 2018 review by Kato and colleagues describes acute chest syndrome as a major cause of morbidity and mortality across the lifespan (Kato et al., 2018). Do not drive yourself if breathlessness, drowsiness, or chest pressure is significant.

Febre, infección e emerxencias esplénicas

A temperature of 38.5°C (101.3°F) or higher in a child or adult with sickle cell disease needs urgent same-day medical assessment unless their specialist team has given a different plan. Functional loss of splenic immune function can make some bacterial infections progress far faster than an ordinary viral fever.

Fever plus lethargy, rash, low blood pressure, confusion, or reduced urine output requires emergency care now. A normal-looking white cell count does not reliably exclude serious infection in sickle cell disease, especially early in illness or during hydroxyurea treatment.

Splenic sequestration occurs most often in young children and causes sudden spleen enlargement, pallor, abdominal fullness, fast breathing, and a rapid hemoglobin fall. Parents are sometimes taught how to feel for their child’s spleen, but any new enlargement with illness should trigger urgent assessment rather than repeated home checks.

A hemoglobin decline of 2 g/dL or more below usual baseline with an enlarged spleen is concerning for sequestration. By contrast, severe anemia with a very low reticulocyte count can suggest aplastic crisis, frequently related to parvovirus B19; reticulocyte count interpretation explains the marrow signal.

Sepsis laboratories may include lactate, cultures, CBC, kidney tests, and inflammatory markers, but treatment decisions should never wait for every value to return. For context on urgent patterns, read sepsis marker clues.

Vaccines and preventive antibiotics

Vaccines and childhood penicillin prophylaxis reduce risk but do not make fever low-risk. Confirm your individualized plan with a hematology or pediatric team, particularly after splenectomy, travel, a new baby, or a change in local immunization schedule.

A ACV e os signos de alerta neurolóxicos requiren acción inmediata

Any sudden face droop, arm or leg weakness, speech difficulty, seizure, severe unusual headache, confusion, or loss of balance in sickle cell disease should be treated as a possible stroke emergency. Call emergency services immediately; do not wait to see whether symptoms pass or give pain medicine first.

Children with HbSS or HbS-beta-zero thalassemia are commonly offered transcranial Doppler ultrasound screening from age 2 through 16 years. An abnormal time-averaged mean maximum velocity of 200 cm/second or higher identifies a substantially increased stroke risk and needs prompt specialist action.

Chronic transfusion therapy can reduce first-stroke risk in children with abnormal Doppler findings, but it creates additional needs: iron-overload monitoring, antibody screening, and careful matching of donor cells. This is specialized care, not a result to manage through an app.

Adults can have transient neurologic symptoms, cognitive changes, or silent cerebral injury without a classic dramatic stroke. A 10-minute episode of word-finding difficulty still needs emergency assessment because transient ischemic symptoms can be a warning, not reassurance.

Dr. Thomas Klein advises families to save their local sickle emergency contact number beside the usual pain plan. It removes one decision during the few minutes when a child or adult may be struggling to communicate.

Protexer riles, ollos e pulmóns entre crises

Sickle cell disease can damage kidneys, retina, lungs and heart even when pain is infrequent, so routine organ surveillance is part of treatment rather than an optional extra. Urine albumin testing, blood pressure checks, eye examinations, and symptom-led lung assessment identify complications before they become obvious.

Albuminuria may be an early sign of sickle nephropathy. A urine albumin-to-creatinine ratio of 30 mg/g or more is abnormal in most adults and should be confirmed with repeat testing because fever, exercise, menstruation, and dehydration can transiently raise it.

Creatinine can look deceptively normal in sickle cell disease because increased tubular secretion and lower muscle mass may mask reduced filtration. Cystatin C or combined equations can add useful context, while persistent foamy urine deserves assessment; see protein in urine guidance.

Retinopathy is particularly important in HbSC disease, which can be clinically quieter in other respects. New floaters, flashes, a curtain-like visual change, or sudden blurred vision need urgent ophthalmic review, not a routine appointment weeks later.

Pregnancy adds physiologic hyperfiltration and higher maternal-fetal risk, so baseline kidney and urine assessment should happen early. Our explanation of pregnancy GFR changes helps distinguish expected change from a concerning trend.

Opcións de tratamento, hidroxiúrea e seguridade da transfusión

Hydroxyurea reduces painful episodes and acute chest syndrome for many people with HbSS or HbS-beta-zero thalassemia by increasing fetal hemoglobin, but it needs structured monitoring. Transfusion can be lifesaving for selected complications, yet repeated transfusions bring iron loading and red-cell antibody risks.

Hydroxyurea is usually titrated with a CBC and reticulocyte count about every 4 weeks until a stable dose is reached, then at longer intervals determined by the treating team. A higher MCV is often an expected treatment effect, whereas severe cytopenia needs medication review and sometimes a temporary hold.

Simple transfusion raises oxygen-carrying capacity, but excessive hemoglobin concentration can increase viscosity in HbSS. Many acute protocols avoid raising post-transfusion hemoglobin much above 10 g/dL unless a specialist sets a different goal; exchange transfusion is used for selected severe complications.

Iron overload becomes more likely after repeated transfusions and is assessed with ferritin trends plus liver or cardiac MRI when appropriate. Ferritin rises with inflammation, so a single high level is not proof of tissue iron burden; our guía de estudos sobre o ferro explica os límites.

The evidence is strongest for hydroxyurea in HbSS and HbS-beta-zero disease; benefit in HbSC remains an area with less certainty and more individualized decision-making. A medication plan should include contraception and pregnancy discussions where relevant, adherence barriers, and a written plan for missed doses.

Embarazo, fertilidade e planificación familiar con HbS

Pregnancy with sickle cell disease needs early joint care from obstetrics and hematology because risks of pain episodes, anemia, thrombosis, infection, pre-eclampsia, fetal growth restriction and preterm birth are higher. Carrier screening matters before pregnancy because genetic risk depends on both biological parents.

A pre-pregnancy visit should review genotype, baseline hemoglobin, kidney function, urine albumin, blood pressure, transfusion history, red-cell antibodies, vaccinations, and medicines. Hydroxyurea decisions in pregnancy are individualized and must be made with specialists; do not stop or restart it based only on internet advice.

Iron should not be prescribed automatically for a low hemoglobin in HbSS. Iron deficiency can coexist, especially with pregnancy or heavy menstrual bleeding, but ferritin and transferrin saturation should guide treatment because chronic hemolysis alone does not equal iron deficiency.

When both parents carry relevant hemoglobin variants, genetic counseling can explain natural conception, prenatal diagnostic choices, donor options, and preimplantation genetic testing without steering a family toward one decision. The aim is informed choice, not alarm.

For other practical pregnancy laboratory red flags, see same-day pregnancy lab concerns. The patient’s known baseline should be included in every maternity handover; it changes how a hemoglobin result is interpreted.

Uso seguro dos resultados de laboratorio entre citas

A sickle cell laboratory result is most useful when compared with your genotype, stable baseline, symptoms, treatments, and recent transfusions. A high bilirubin or low hemoglobin may be expected for one person with HbSS but urgent for the same person if the result shifts abruptly.

Keep a one-page record of genotype, usual hemoglobin, usual oxygen saturation if known, blood group and antibodies, current medicines, transfusion dates, and emergency contacts. This saves time in unfamiliar emergency departments and reduces the chance that an HbSS baseline is mistaken for newly discovered anemia.

Kantesti é un servizo de interpretación de probas de laboratorio de IA that can organize uploaded laboratory reports and flag patterns for discussion, including hemolysis markers, kidney trends, and medication monitoring. It cannot see your chest, measure oxygenation, or replace emergency care when symptoms point to acute chest syndrome, sepsis, or stroke.

A result outside a laboratory reference interval is not automatically dangerous, and a result inside it can still be dangerous if it has changed sharply. For an explanation of reporting flags and reference ranges, read out-of-range result meaning.

Kantesti’s clinical approach is reviewed against defined methods and limitations; readers who want to understand our safeguards can review estándares de validación clínica. Bring the original PDF to your hematology appointment—OCR is useful, but the source report remains the record.

Un plan de acción claro ante emerxencias para a enfermidade falciforme

Seek emergency help now for chest pain or breathlessness, fever of 38.5°C or higher, new neurologic symptoms, fainting, severe pallor, uncontrolled pain, a rapidly enlarging abdomen, or inability to drink and take medicines. These warning signs can indicate acute chest syndrome, sepsis, stroke, severe anemia, or splenic sequestration.

Tell emergency staff that you have sickle cell disease, state your genotype if known, and describe what is different from your usual episode. Mention recent transfusion, baseline hemoglobin, pain medicines already taken with doses and times, allergies, pregnancy, and any prior acute chest syndrome or stroke.

Do not wait for a home pulse oximeter to become abnormal if chest symptoms are worsening. Consumer devices can misread with cold fingers, nail products, movement, poor circulation, and some skin tones; symptoms and clinical assessment outweigh one reassuring display.

If you care for a child, ask their team for a written fever threshold, analgesia plan, and spleen-check instructions. If you are an adult, keep a copy in your phone and share it with one trusted person; family health record planning can make this easier.

Kantesti’s medical team, including our Consello Asesor Médico, supports education around laboratory interpretation, while emergency decisions belong with in-person clinical services. About our organization and clinical mission, see our team and approach.

Preguntas frecuentes

cales son os primeiros síntomas da anemia falciforme en bebés?

Os primeiros síntomas da anemia falciforme adoitan aparecer despois dos 4 a 6 meses de idade, cando a hemoglobina fetal diminúe de forma natural. Hinchazón dolorosa das mans e dos pés, chamada dactilite, febre, irritabilidade inusual, palidez, ictericia, dificultade para alimentarse e un abdome inchado son sinais de alerta temperáns comúns. Unha febre de 38,5 °C (101,3 °F) ou superior nun lactante con enfermidade falciforme require unha avaliación médica urxente o mesmo día, xa que unha infección grave pode progresar rapidamente. A detección neonatal identifica aos lactantes afectados antes de que comecen os síntomas, pero as probas de confirmación e o seguimento especializado seguen sendo necesarios.

Podes ter trazo falciforme e aínda así ter síntomas?

A maioría das persoas con trazo falciforme non teñen anemia crónica, nin crises de dor recorrentes, nin tolerancia normal ao exercicio diario. Poden ocorrer complicacións raras en casos de deshidratación extrema, exposición severa ao calor, altitude elevada, esforzo moi intenso ou ambientes de baixo osíxeno, e a sangue na urina debe ser avaliada en lugar de asumirse como benigna. Trazo significa un xene HbS, mentres que a anemia falciforme normalmente significa enfermidade HbSS con dous xenes beta-globina afectados. A electroforese de hemoglobina ou unha proba de fraccionamento equivalente pode aclarar a distinción.

Que proba confirma a anemia falciforme?

A electroforese de hemoglobina, a cromatografía líquida de alta resolución ou a electroforese capilar confirman as fraccións de hemoglobina presentes e son centrais para o diagnóstico da anemia falciforme. O HbSS non tratado adoita mostrar predominantemente hemoglobina S sen hemoglobina A, mentres que o trazo adoita mostrar tanto hemoglobina A como hemoglobina S. Unha CBC pode identificar anemia ou glóbulos vermellos pequenos, pero non pode diagnosticar de forma independente HbSS, HbSC ou trazo. Transfusións recentes poden distorsionar os resultados das fraccións durante uns 3 meses, polo que poden ser necesarias probas moleculares cando o padrón non está claro.

Cando debe acudir a urxencias unha persoa con anemia falciforme?

Unha persoa con drepanocitose debe buscar avaliación de emerxencia ante febre de 38,5 °C (101,3 °F) ou superior, dor no peito, disnea, hipoxemia, debilidade súbita, dificultade para falar, convulsións, desmaio, palidez que empeora rapidamente, inchazo abdominal severo ou dor que non se controla co plan establecido. Estes síntomas poden indicar síndrome torácica aguda, infección, ictus, secuestro esplénico ou unha diminución súbita da hemoglobina. A dor nova ou diferente tamén precisa avaliación porque a infección ósea, a enfermidade da vesícula biliar, a apendicite e os coágulos poden imitar a dor vaso-oclusiva. Non conduza vostede mesmo se os síntomas neurolóxicos ou respiratorios son significativos.

Que nivel de hemoglobina é perigoso na doenza falciforme?

Non hai un único número perigoso de hemoglobina na doenza falciforme porque moitas persoas con HbSS teñen unha liña de base estable entre aproximadamente 6 e 9 g/dL. Unha caída de 2 g/dL ou máis respecto á hemoglobina habitual do individuo é a miúdo máis preocupante que o valor absoluto e pode suxerir crise aplásica, secuestro esplénico, hemorraxia ou hemólise acelerada. Síntomas graves como falta de aire, desmaio, dor no peito, latexo cardíaco rápido ou confusión requiren unha avaliación urxente a calquera nivel de hemoglobina. As decisións de transfusión dependen dos síntomas, da liña de base, da causa da anemia, da osixenación e do risco de hiperviscosidade.

A hidroxourea cura a anemia falciforme?

A hidroxiurea non cura a anemia falciforme, pero pode reducir os episodios de dor, a síndrome torácica aguda, a necesidade de transfusións e o uso do hospital para moitas persoas con HbSS ou talasemia HbS-beta-cero. Funciona en parte aumentando a hemoglobina fetal e normalmente require seguimento de CBC e reticulocitos aproximadamente cada 4 semanas mentres se axusta a dose. Un aumento do MCV e do nivel de HbF pode indicar un efecto biolóxico, aínda que ningún resultado demostra unha adhesión perfecta. As abordaxes curativas, como o transplante de células nai e algunhas terapias baseadas en xenes, requiren unha avaliación de elegibilidade altamente especializada e un seguimento a longo prazo.

Anemia falciforme: cribado, síntomas e signos de urxencia

Thomas Klein, doutor en medicina

Sarah Mitchell, doutora en medicina e doutora

Profesor Dr. Hans Weber, doutor