SE-ATLAS

Maladie hémorragique de l'est du Texas Syndrome de persistance familiale de l'hémoglobine foetale-drépanocytose Chondrosarcome myxoïde extrasquelettique Lymphome T cutané primitif d'évolution indolente Déficit en glutathion synthétase avec 5-oxoprolinurie Syndrome hémolytique et urémique atypique associé à une anomalie de MCP/CD 46 Tumeur neuronale Lymphome cutané à grandes cellules de type jambe Tumeur oligoastrocytaire Anémie hémolytique par déficit en glutathion réductase Lymphome de Hodgkin nodulaire à prédominance lymphocytaire Tumeur maligne des gaines nerveuses périphériques Syndrome hémolytique et urémique atypique associé à une anomalie C3 Urticaire pigmentaire en plaques Lymphome T cutané primitif d'évolution agressive Syndrome hémolytique et urémique atypique associé à une anomalie du facteur B Mastocytose systémique Neurocytome central Mastocytose systémique type smoldering Anémie hémolytique non sphérocytique par déficit en hexokinase Abêtalipoprotéinémie Oligoastrocytome Syndrome de sclérose en plaques-ichtyose-déficit en facteur VIII Tumeur rare des tissus mous Dermatofibrosarcome de Darier-Ferrand Tumeur germinale non séminomateuse des testicules Syndrome avec alpha-thalassémie comme manifestation majeure Urticaire pigmentaire nodulaire Syndrome hémolytique et urémique atypique associé à une anomalie du facteur I Sarcome des cellules de Langerhans Elliptocytose familiale Neurocytome extraventriculaire Sarcome histiocytaire Anémie hémolytique auto-immune à auto-anticorps chauds Tumeur des tissus lymphoïde et hématopoïétique Syndrome hémolytique et urémique atypique associé à une anomalie du facteur H Anémie hémolytique auto-immune mixte Déficit congénital en facteurs Vitamino-K dépendants Syndrome de Plummer-Vinson Mastocytose isolée de la moelle osseuse Syndrome de Pearson Tumeur mixte neuronale-gliale Syndrome hyperéosinophilique primitif Tumeur germinale des testicules Lymphome oculo-cérébral primitif Syndrome hémolytique et urémique atypique associé à des anticorps anti-facteur H Hémoglobinurie paroxystique a frigore Maladie de von Willebrand type plaquette Syndrome hémolytique et urémique à Escherichia coli producteur de Shiga-toxines Anémie rare Méningiomes multiples familiaux Sarcome des cellules dendritiques interdigitées Anémie hémolytique auto-immune induite par les médicaments Lymphome B cutané primitif d'évolution agressive Purpura thrombotique thrombocytopénique congénital Maladie hémolytique du nouveau-né avec allo-immunisation Kell Liponeurocytome cérébelleux Tumeur triton maligne Aplasie et myélodysplasie autosomiques dominantes Sarcome des cellules dendritiques sans autre spécification Syndrome hémolytique et urémique atypique associé à une anomalie de la thrombomoduline Anémie constitutionnelle due à une anomalie du métabolisme du fer Déficit en glutathion synthétase sans 5-oxoprolinurie Sarcome des cellules folliculaires dendritiques Syndrome de persistance familiale de l'hémoglobine foetale-bêta-thalassémie Hémoglobinose D Leucémie myéloblastique aiguë type associée à une translocation t(8;21)(q22;q22) Déficit en glutamate-cystéine ligase Purpura thrombotique thrombocytopénique d'origine immunitaire Myélome multiple Gangliocytome Maladie hémolytique par allo-immunisation foetomaternelle Thrombocytose familiale Epulis congénital Anémie sidéroblastique constitutionnelle Maladie d'Ollier Tumeur testiculaire germinale séminomateuse Lymphome B cutané primitif d'évolution indolente Troubles lymphoprolifératifs associés au méthotréxate Déficit acquis en facteur II Oligoastrocytome anaplasique Syndrome de Gaisböck Lymphome intra-oculaire primaire Déficit acquis en protéine S Séminome spermatocytaire Syndrome de Sézary Anémie hémolytique constitutionnelle rare par anomalie de la membrane du globule rouge Malabsorption héréditaire de l'acide folique Lymphome primitif des os Périneuriome sclérosant Acidémie méthylmalonique avec homocystinurie Syndrome marfanoïde-neurofibromes systémiques et orbitaux douloureux Pseudohyperkaliémie familiale Anémie hémolytique rare Périneuriome réticulé Alpha-thalassémie Tumeur gliale du tissu neuroépithélial d'origine inconnue Périneuriome intraneural Troubles hémorragiques par déficit en récepteur du collagène Lymphome B cutané primitif Astrocytome/gangliogliome desmoplasique infantile Anémie hémolytique constitutionnelle due à une acanthocytose Tumeur épendymaire Alpha-thalassémie-déficience intellectuelle liée à l'X Stomatocytose héréditaire Périneuriome extraneural Sarcome d'Ewing extrasquelettique Anémie hémolytique constitutionnelle rare par anomalie enzymatique Bêta-thalassémie Anémie arégénérative Anémie hémolytique par déficit en phosphoglucose isomérase Acidurie orotique héréditaire Maladie thrombotique rare par anomalie constitutionnelle des plaquettes Gliome chordoïde Syndrome de Chédiak-Higashi Thrombasthénie de Glanzmann Glycogénose par déficit en phosphoglycérate kinase 1 Cryoglobulinémie simple Tumeur neuroépithéliale dysembryoplasique Mycosis fongoïde et variants Thrombopénie de May-Hegglin Syndrome OSLAM Bêta-thalassémie majeure Anémie hémolytique par déficit en phosphoglycéromutase Sarcome alvéolaire des tissus mous Déficit en glutathion synthétase Anémie hémolytique due à une anomalie du métabolisme du glutathion et du shunt héxose monophosphate Syndrome d'hypercoagulabilité par déficit héréditaire en glycosyl phosphatidyl inositol Thrombocytopénie type Paris-Trousseau Hémophilie acquise Gliome angiocentrique Maladie de Letterer-Siwe Hémoglobinopathie Thrombocytopénie liée à l'X avec plaquettes normales Astroblastome Anémie dysérythropoïétique congénitale type IV Anémie hémolytique par anomalie des enzymes glycolytiques Porphyrie érythropoïétique congénitale Leucémie mastocytaire classique Thrombopénie materno-foetale et néonatale allo-immune Anémie microcytaire avec surcharge hépatique en fer Maladie thrombotique rare par anomalie acquise des plaquettes Lymphome primitif du système nerveux central Syndrome de Hashimoto-Pritzker Troubles hémorragiques par déficit de synthèse de la thromboxane Mastocytose lymphoadénopathique avec éosinophiles Thrombocytopénie héréditaire avec plaquettes normales Gangliogliome Anémie hémolytique auto-immune Anémie hémolytique par anomalie du métabolisme nucléotidique de l'érythrocyte Craniopharyngiome Déficit combiné en facteurs V et VIII Acidémie méthylmalonique avec homocystinurie type cblC Angiosarcome Hémoglobinurie paroxystique nocturne Tumeur germinale maligne non dysgerminomateuse de l'ovaire Hémophilie Macrothrombocytopenie avec insuffisance mitrale Syndrome hyperéosinophilique secondaire Lymphome thyroïdien Hépatoblastome Bêta-thalassémie intermédiaire Gliome des voies optiques Hypodysfibrinogénémie familiale Méningiome Lymphome primaire spécifique d'organe Déficit en transcobalamine Syndrome POEMS Acidémie méthylmalonique avec homocystinurie type cblD Leucémie aiguë myéloïde héréditaire Leucémie mastocytaire aleucémique Syndrome myélodysplasique Acidémie méthylmalonique avec homocystinurie type cblF Sarcome osseux Syndrome d'alpha-thalassémie-déficience intellectuelle associée au chromosome 16 Germinome extragonadique Amylose primitive systémique Histiocytose non langerhansienne Lymphoid hemopathy Isolated hereditary giant platelet disorder Myeloid hemopathy Essential thrombocythemia Refractory anemia with excess blasts type 2 Thiamine-responsive megaloblastic anemia syndrome Embryonal carcinoma of the central nervous system Acute erythroid leukemia Anaplastic ganglioglioma Dominant beta-thalassemia Congenital amegakaryocytic thrombocytopenia Refractory anemia with excess blasts type 1 Skeletal Ewing sarcoma Epignathus Extramedullary soft tissue plasmacytoma Thrombocytopenia-absent radius syndrome Polycythemia vera Thrombotic thrombocytopenic purpura Constitutional dyserythropoietic anemia Esthesioneuroblastoma Primary plasmacytoma of the bone Autosomal thrombocytopenia with normal platelets Multiple osteochondromas Familial LCAT deficiency Hoyeraal-Hreidarsson syndrome Alpha-heavy chain disease Peripheral primitive neuroectodermal tumor Papillary glioneuronal tumor Rare hereditary thrombophilia Triose phosphate-isomerase deficiency Mu-heavy chain disease Evans syndrome Primary cutaneous T-cell lymphoma Beta-thalassemia associated with another hemoglobin anomaly Embryonal carcinoma Delta-beta-thalassemia Familial thrombomodulin anomalies Hemoglobin H disease Heparin-induced thrombocytopenia Gamma-heavy chain disease Rare constitutional aplastic anemia Lymphoma Alpha delta granule deficiency Rare tumor of neuroepithelial tissue Congenital factor II deficiency Post-transplant lymphoproliferative disease Congenital factor V deficiency Alveolar rhabdomyosarcoma Hemoglobinopathy Toms River Congenital factor VII deficiency Desmoid tumor Hemoglobin C-beta-thalassemia syndrome Congenital factor X deficiency Congenital plasminogen activator inhibitor type 1 deficiency Acquired purpura fulminans Congenital factor XI deficiency WT limb-blood syndrome Embryonal rhabdomyosarcoma Acute myeloid leukemia with CEBPA somatic mutations Congenital factor XII deficiency Glycogen storage disease due to aldolase A deficiency Constitutional megaloblastic anemia due to vitamin B12 metabolism disorder Yolk sac tumor High-grade astrocytoma Congenital factor XIII deficiency Primary localized amyloidosis Polyembryoma B-cell non-Hodgkin lymphoma Congenital intrinsic factor deficiency Mixed germ cell tumor Rhabdoid tumor predisposition syndrome Hb Bart's hydrops fetalis Rare acquired aplastic anemia Severe hereditary thrombophilia due to congenital protein S deficiency Rare deficiency anemia AL amyloidosis Rosette-forming glioneuronal tumor Formiminoglutamic aciduria Rhabdoid tumor Congenital fibrinogen deficiency Hereditary thrombophilia due to congenital histidine-rich (poly-L) glycoprotein deficiency Severe hereditary thrombophilia due to congenital protein C deficiency Beta-thalassemia with other manifestations Primary CD59 deficiency Epstein syndrome Extragonadal teratoma Liposarcoma Heinz body anemia Hemoglobin E-beta-thalassemia syndrome Dehydrated hereditary stomatocytosis Overhydrated hereditary stomatocytosis T-cell non-Hodgkin lymphoma Constitutional deficiency anemia Autosomal dominant macrothrombocytopenia Methylmalonic acidemia with homocystinuria, type cblJ Stormorken-Sjaastad-Langslet syndrome Congenital prekallikrein deficiency Hemolytic anemia due to pyrimidine 5' nucleotidase deficiency Autosomal recessive sideroblastic anemia Hemolytic uremic syndrome with DGKE deficiency Glomus tumor Rare acquired deficiency anemia Leiomyosarcoma Medulloblastoma Pancreatic insufficiency-anemia-hyperostosis syndrome Hypoxanthine-guanine phosphoribosyltransferase deficiency Constitutional megaloblastic anemia due to folate metabolism disorder Methylmalonic acidemia with homocystinuria, type cblX Myelodysplastic/myeloproliferative disease Lipoblastoma Alport syndrome-intellectual disability-midface hypoplasia-elliptocytosis syndrome IRIDA syndrome Ovarian dysgerminoma Bleeding disorder in hemophilia B carriers Malignant germ cell tumor of ovary Osteoblastoma Myeloproliferative neoplasm Hemolytic anemia due to adenylate kinase deficiency Thrombocythemia with distal limb defects Embryonal tumor of neuroepithelial tissue Cutaneous mastocytoma Congenital high-molecular-weight kininogen deficiency Chronic myelomonocytic leukemia X-linked sideroblastic anemia and spinocerebellar ataxia Hemolytic anemia due to glyceraldehyde-3-phosphate dehydrogenase deficiency Fechtner syndrome Bleeding disorder in hemophilia A carriers Beta-thalassemia-X-linked thrombocytopenia syndrome Rare immune disease Primary non-gestational choriocarcinoma of ovary Acute myeloid leukemia with recurrent genetic anomaly Extragonadal non-dysgerminomatous germ cell tumor Diaphyseal medullary stenosis-bone malignancy syndrome Bleeding disorder due to P2Y12 defect Hereditary methemoglobinemia Kaposiform hemangioendothelioma Benign peripheral nerve sheath tumor Maculopapular cutaneous mastocytosis Inflammatory myofibroblastic tumor Unclassified myelodysplastic/myeloproliferative disease Nasopharyngeal teratoma Medulloblastoma with extensive nodularity Homocystinuria without methylmalonic aciduria Thrombocytopenia with congenital dyserythropoietic anemia Diffuse cutaneous mastocytosis Atypical chronic myeloid leukemia Vitamin B12- and folate-independent constitutional megaloblastic anemia Unclassified myelodysplastic syndrome Rare hemorrhagic disorder due to a constitutional thrombocytopenia Ganglioneuroma Malignant peripheral nerve sheath tumor with perineurial differentiation Congenital alpha2-antiplasmin deficiency Giant cell tumor of bone Anaplastic/large cell medulloblastoma Papilloma of choroid plexus Refractory anemia Rh deficiency syndrome Rare hemorrhagic disorder Rare bone tumor Solitary fibrous tumor Non-central nervous system-localized embryonal carcinoma Acute myeloid leukemia with abnormal bone marrow eosinophils inv(16)(p13q22) or t(16;16)(p13;q22) Rare hemorrhagic disorder due to a coagulation factors defect Plasma cell tumor Hereditary thrombophilia due to congenital antithrombin deficiency Alpha-thalassemia-myelodysplastic syndrome Chronic neutrophilic leukemia Acute myeloid leukemia with 11q23 abnormalities Primary acquired red cell aplasia Hemolytic anemia due to red cell pyruvate kinase deficiency Fanconi anemia Adult-onset autosomal recessive sideroblastic anemia Primary germ cell tumor of central nervous system Von Willebrand disease Macrophage or histiocytic tumor Rare hemorrhagic disorder due to a qualitative platelet defect Acute myeloid leukemia and myelodysplastic syndromes related to alkylating agent Congenital dyserythropoietic anemia Acute myeloblastic leukemia without maturation Neuroepithelioma Histiocytic and dendritic cell tumor Hemoglobin C disease Chronic eosinophilic leukemia Acute myeloid leukemia with minimal differentiation Chronic myeloproliferative disease, unclassifiable Low-grade astrocytoma Immunodeficiency-associated lymphoproliferative disease Gestational choriocarcinoma Hemoglobin E disease Acute undifferentiated leukemia Immunodeficiency syndrome with hypopigmentation Bullous diffuse cutaneous mastocytosis Revesz syndrome Dendritic cell tumor Idiopathic aplastic anemia Acute myeloid leukemia and myelodysplastic syndromes related to topoisomerase type 2 inhibitor Desmoplastic/nodular medulloblastoma Cutaneous mastocytosis Acute myeloblastic leukemia with maturation Atypical hemolytic uremic syndrome Nasal ganglioglioma Mastocytosis Lhermitte-Duclos disease Deafness-lymphedema-leukemia syndrome Rare coagulation disorder Acute biphenotypic leukemia Neuroblastoma Lymphoproliferative disease associated with primary immune disease Juvenile myelomonocytic leukemia Central nervous system embryonal tumor Yolk sac tumor of central nervous system Von Willebrand disease type 2 Constitutional megaloblastic anemia with severe neurologic disease Bilineal acute leukemia Mediterranean macrothrombocytopenia Lethal hemolytic anemia-genital anomalies syndrome Unclassified acute myeloid leukemia Radio-ulnar synostosis-amegakaryocytic thrombocytopenia syndrome Refractory cytopenia with multilineage dysplasia Myeloid/lymphoid neoplasms associated with eosinophilia and abnormality of PDGFRA, PDGFRB, FGFR1 or JAK2 Sideroblastic anemia Von Willebrand disease type 1 Hemophagocytic syndrome Melanoma of soft tissue Classic medulloblastoma Hodgkin lymphoma Von Willebrand disease type 2A Refractory anemia with excess blasts Epithelioid sarcoma Hermansky-Pudlak syndrome due to AP-3 deficiency Gonadal germ cell tumor Alpha-thalassemia and related disorders Rare constitutional hemolytic anemia Astrocytoma Primary hemophagocytic lymphohistiocytosis Chondrosarcoma Myelodysplastic syndrome associated with isolated del(5q) chromosome abnormality Sickle cell anemia Cold agglutinin disease Myeloid/lymphoid neoplasm associated with PDGFRA rearrangement Severe congenital hypochromic anemia with ringed sideroblasts Adamantinoma Pseudoxanthomatous diffuse cutaneous mastocytosis Rare hemorrhagic disorder due to a platelet anomaly Hereditary combined deficiency of vitamin K-dependent clotting factors Combined immunodeficiency due to CD27 deficiency Rare aplastic anemia Glycogen storage disease due to muscle phosphofructokinase deficiency Rhabdomyosarcoma Secondary hemophagocytic lymphohistiocytosis Growing teratoma syndrome Choriocarcinoma of the central nervous system Griscelli syndrome type 2 Rare acquired hemolytic anemia Pleomorphic rhabdomyosarcoma Acute panmyelosis with myelofibrosis Myeloid/lymphoid neoplasm associated with FGFR1 rearrangement Telangiectasia macularis eruptiva perstans Maffucci syndrome Extragonadal germ cell tumor Ganglioneuroblastoma Indolent systemic mastocytosis Therapy related acute myeloid leukemia and myelodysplastic syndrome Myeloid/lymphoid neoplasm associated with PDGFRB rearrangement Von Willebrand disease type 2B Lesch-Nyhan syndrome Acute myeloid leukaemia with myelodysplasia-related features Primary pulmonary lymphoma Extracutaneous mastocytoma Hypereosinophilic syndrome Aggressive systemic mastocytosis MYH9-related disease Medulloepithelioma of the central nervous system Mast cell sarcoma Von Willebrand disease type 2N Rare hemorrhagic disorder due to an acquired coagulation factor defect Systemic mastocytosis with associated hematologic neoplasm Teratoma of the central nervous system Myeloid sarcoma Acute lymphoblastic leukemia Congenital atransferrinemia Acute myeloid leukemia and myelodysplastic syndromes related to radiation Von Willebrand disease type 2M Acute monoblastic/monocytic leukemia X-linked dyserythropoietic anemia with abnormal platelets and neutropenia Ependymoblastoma Mast cell leukemia Acute basophilic leukemia Primary lymphoma of the conjunctiva Von Willebrand disease type 3 Beta-thalassemia and related diseases Rare thrombotic disease of hematologic origin Hemoglobin Lepore-beta-thalassemia syndrome Acute leukemia of ambiguous lineage Acute myelomonocytic leukemia Germinoma of the central nervous system Nephroblastoma Acute megakaryoblastic leukemia Hemophagocytic syndrome associated with an infection Refractory anemia with excess blasts in transformation Mixed germ cell tumor of central nervous system Sickle cell disease and related diseases Congenital sideroblastic anemia-B-cell immunodeficiency-periodic fever-developmental delay syndrome Acute myeloid leukemia Oligodendroglial tumor Acute promyelocytic leukemia Primary melanocytic tumor of central nervous system Familial hypofibrinogenemia Benign schwannoma Plasmacytoma Chronic myeloid leukemia Composite lymphoma McLeod neuroacanthocytosis syndrome Undifferentiated pleomorphic sarcoma Tumor of meninges Hemoglobin M disease Choroid plexus tumor Non-amyloid monoclonal immunoglobulin deposition disease Hereditary isolated aplastic anemia 6-phosphogluconate dehydrogenase deficiency Langerhans cell histiocytosis Diffuse leptomeningeal melanocytosis Dense granule disease Hemolytic anemia due to erythrocyte adenosine deaminase overproduction Alpha granule disease Rare hemorrhagic disorder due to an acquired platelet anomaly Tricuspid atresia Classic Hodgkin lymphoma Acquired hemophagocytic lymphohistiocytosis associated with malignant disease Juvenile hyaline fibromatosis Sickle cell disease associated with another hemoglobin anomaly Glial tumor Oligodendroglioma Severe hemophilia B Primary cutaneous CD4+ small/medium-sized pleomorphic T-cell lymphoma Heavy chain disease Soft tissue sarcoma Fibrosarcoma Choroid plexus carcinoma Unstable hemoglobin disease Congenital dyserythropoietic anemia type III Congenital dyserythropoietic anemia type I Macrophage activation syndrome Southeast Asian ovalocytosis Osteosarcoma Persistent polyclonal B-cell lymphocytosis Idiopathic hypereosinophilic syndrome Imerslund-Gräsbeck syndrome Primary acquired pure red cell aplasia Methylcobalamin deficiency type cblE Pineal tumor of neuroepithelial tissue Sickle cell-beta-thalassemia disease syndrome X-linked lymphoproliferative disease Moderate hemophilia B Diamond-Blackfan anemia Scott syndrome Autoimmune lymphoproliferative syndrome Rare thrombotic disorder due to a coagulation factors defect Methylcobalamin deficiency type cblG Transient erythroblastopenia of childhood Sebastian syndrome Langerhans cell histiocytosis specific to childhood Bloom syndrome Hypoxanthine guanine phosphoribosyltransferase partial deficiency Anaplastic oligodendroglioma Acquired von Willebrand syndrome Germ cell tumor Vestibular schwannoma Atypical papilloma of choroid plexus Congenital dyserythropoietic anemia type II Aceruloplasminemia Light and heavy chain deposition disease Pineoblastoma Myxoid/round cell liposarcoma Acute myeloid leukemia with t(8;16)(p11;p13) translocation Atypical teratoid rhabdoid tumor Autoimmune hemolytic anemia, cold type Severe hemophilia A Heavy chain deposition disease Shwachman-Diamond syndrome Perineurioma Rare thrombotic disorder due to a constitutional coagulation factors defect Pleomorphic liposarcoma Hemophilia A Light chain deposition disease Adult T-cell leukemia/lymphoma Primary cutaneous aggressive epidermotropic CD8+ T-cell lymphoma Mild hemophilia B Familial hemophagocytic lymphohistiocytosis Low-grade ependymoma Primary melanoma of the central nervous system Rare nervous system tumor Moderate hemophilia A Well-differentiated liposarcoma Primary cutaneous CD30+ T-cell lymphoproliferative disease Familial afibrinogenemia Hereditary cryohydrocytosis with reduced stomatin Kaposi sarcoma Primary cutaneous lymphoma Pineocytoma Dedifferentiated liposarcoma Hemophilia B Rare thrombotic disorder due to an acquired coagulation factors defect Desmoplastic small round cell tumor Sickle cell-hemoglobin C disease syndrome Neurofibroma Primary cutaneous gamma/delta-positive T-cell lymphoma Myxofibrosarcoma Meningeal melanocytoma Familial dysfibrinogenemia Extranodal nasal NK/T cell lymphoma Hemorrhagic disease due to alpha-1-antitrypsin Pittsburgh mutation Infantile myofibromatosis Hemangioblastoma Synovial sarcoma Bernard-Soulier syndrome Subcutaneous panniculitis-like T-cell lymphoma Non-Hodgkin lymphoma Primary cutaneous marginal zone B-cell lymphoma Immune thrombocytopenia Sickle cell-hemoglobin D disease syndrome Dyskeratosis congenita Papillary tumor of the pineal region Acquired idiopathic sideroblastic anemia Mild hemophilia A Bleeding diathesis due to integrin alpha2-beta1 deficiency Rare hemorrhagic disorder due to a constitutional coagulation factors defect Bleeding diathesis due to glycoprotein VI deficiency X-linked sideroblastic anemia Rare thrombotic disorder due to a platelet anomaly Hereditary spherocytosis Typical urticaria pigmentosa Methylcobalamin deficiency type cblDv1 Primary cutaneous peripheral T-cell lymphoma not otherwise specified Sickle cell-hemoglobin E disease syndrome Tumor of cranial and spinal nerves Autoimmune thrombocytopenia Primary myelofibrosis Mitochondrial myopathy and sideroblastic anemia Primary cutaneous follicle center lymphoma Rare hemorrhagic disorder due to a constitutional platelet anomaly Pineal parenchymal tumor of intermediate differentiation Anaplastic ependymoma