Glanzmann's thrombasthenia
Glanzmann's thrombasthenia
Classification & external resources
| ICD-10 |
D69.1 |
| ICD-9 |
287.1 |
| OMIM |
187800 273800 |
| DiseasesDB |
5224 |
| eMedicine |
med/872 |
| MeSH |
D013915 |
Glanzmann's thrombasthenia is an extremely rare disorder of the blood, in which the platelets lack glycoprotein IIb/IIIa. Hence, no fibrinogen bridging can occur, and bleeding time is significantly prolonged.
Pathophysiology
The GpIIb/IIIa is an adhesion receptor and is expressed in thrombocytes. This receptor is activated when the thrombocyte is stimulated by ADP, epinephrine, collagen and thrombin. The GpIIb/IIIa integrin is essential to the blood coagulation since it has the ability to bind fibrinogen, the von Willebrand factor, fibronectin and vitronectin. This enables the platelet to be activated by contact with the collagen-von Willebrand-complex that is exposed when the endothelial blood vessel lining is damaged and then aggregate with other thrombocytes via fibrinogen.
Patients suffering from Glanzmann's thrombasthenia thus have platelets less able to adhere to each other and to the underlying tissue of damaged blood vessels.
The understanding of its pathophysiology led to the development of GpIIb/IIIa inhibitors, a class of powerful antiplatelet agents.[1]
Etiology
Glanzmann's thrombasthenia can be inherited in an autosomal recessive manner[1] or acquired as an autoimmune disorder.[2]
Clinical Features
Characteristically, there is increased mucosal bleeding:
The bleeding tendency is variable but may be severe.
Patients present with moderate bleeding and normal platelet morphology. Aggregation of platelets occurs in response to ristocetin, but not to other agonists such as ADP, thrombin, collagen or adrenalin.
Eponym
It is named for Eduard Glanzmann.[3][4]
References
- ^ a b Seligsohn U. Glanzmann thrombasthenia: a model disease which paved the way to powerful therapeutic agents. Pathophysiol Haemost Thromb. 2002 Sep-Dec;32(5-6):216-7. PMID 13679645. Free Full Text.
- ^ Tholouli E, Hay CR, O'Gorman P, Makris M. Acquired Glanzmann's thrombasthenia without thrombocytopenia: a severe acquired autoimmune bleeding disorder. Br J Haematol. 2004 Oct;127(2):209-13. PMID 15461628.
- ^ synd/1289 at Who Named It
- ^ W. E. Glanzmann. Hereditäre hämorrhägische Thrombasthenie. Ein Beitrag zur Pathologie der Blutplättchen. Jahrbuch für Kinderheilkunde, 1918; 88: 1-42, 113-141.
See also
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Pathology: hematology (primarily C81-C96/200-208, D45-D47, D50-D77/280-289) |
| WBCs |
hematological malignancy (lymphoma, leukemia, multiple myeloma), myeloproliferative disease, myelodysplastic syndrome
-cytosis (Agranulocytosis, Leukocytosis, Lymphocytosis, Monocytosis) • -penia (Lymphopenia, Neutropenia) |
RBCs/anemia/
hemoglobinopathy |
nutritional anemia: Iron deficiency anemia, Plummer-Vinson syndrome, Megaloblastic anemia (Pernicious anemia)
hereditary hemolytic anemia: G6PD Deficiency, Thalassemia, Sickle-cell disease/trait, Hereditary spherocytosis, Hereditary elliptocytosis, Hereditary stomatocytosis
acquired hemolytic anemia: Autoimmune (Warm), HUS, MAHA, PNH, PCH
aplastic anemia: Acquired PRCA, Diamond-Blackfan anemia, Fanconi anemia • Sideroblastic anemia • Hemochromatosis |
| Coagulation/platelets |
coagulopathy: DIC • Hemophilia (A/VII, B/IX, C/XI, XIII) • Von Willebrand disease
Purpura: Henoch-Schönlein, ITP (Evans syndrome), TTP
primary hypercoagulable state: Protein C deficiency - Protein S deficiency - Antithrombin III deficiency - Antiphospholipid syndrome - Factor V Leiden
other hemorrhagic conditions: Bernard-Soulier syndrome - Glanzmann's thrombasthenia - Grey platelet syndrome |
| Histiocytosis |
WHO-I Langerhans cell histiocytosis - non-Langerhans-cell histiocytosis/WHO-II (Juvenile xanthogranuloma, Hemophagocytic lymphohistiocytosis) - malignant histiocytic disorders/WHO-III (Acute monocytic leukemia, Malignant histiocytosis, Erdheim-Chester disease) |
| Other |
Asplenia/hyposplenism - Methemoglobinemia |
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