Related Experiment Video
Updated: May 10, 2025

Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells
Published on: January 29, 2014
Antiphospholipid anti-body syndrome presenting with diffuse alveolar haemorrhage and refractory autoimmune haemolytic
Vikas Marwah1, Arun Hegde2, Sudipt Adhikari1
1Department of Pulmonary, Critical Care and Sleep Medicine, Army Institute of Cardiothoracic Sciences, Armed Forces Medical College, Wanowrie, Pune 411040, Maharashtra, India.
Antiphospholipid antibody syndrome (APS) is characterized by vascular thrombosis. Somewhat paradoxically, some patients with this disease develop diffuse alveolar haemorrhage. This bleeding is usually a delayed manifestation, occurring a few years after the onset of other manifestations and diagnosis of APS. We encountered a patient with an unusual presentation, i.e. onset with diffuse alveolar haemorrhage as well as vascular thromboses. He also had autoimmune haemolytic anaemia, which is infrequent in APS. The diagnosis of APS was based on elevated levels of IgM and IgG anti-cardiolipin antibody and IgG and IgM beta-2 GP1 antibodies. Treatment with high-dose glucocorticoids, anticoagulants and rituximab led to a decline in levels of these antibodies and was associated with a good and lasting clinical response.
Antiphospholipid antibody syndrome (APS) is characterized by vascular thrombosis. Somewhat paradoxically, some patients with this disease develop diffuse alveolar haemorrhage. This bleeding is usually a delayed manifestation, occurring a few years after the onset of other manifestations and diagnosis of APS. We encountered a patient with an unusual presentation, i.e. onset with diffuse alveolar haemorrhage as well as vascular thromboses. He also had autoimmune haemolytic anaemia, which is infrequent in APS. The diagnosis of APS was based on elevated levels of IgM and IgG anti-cardiolipin antibody and IgG and IgM beta-2 GP1 antibodies. Treatment with high-dose glucocorticoids, anticoagulants and rituximab led to a decline in levels of these antibodies and was associated with a good and lasting clinical response.
Related Concept Videos
Rh Blood Group
Acute Respiratory Failure-II
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
Blood Transfusion and Agglutination
History
The history of blood transfusion dates back to the 17th century, when early attempts were made in animals. In 1818 James Blundell, a British doctor, performed the first successful human blood transfusion. Later in 1900, Karl...
Immunodeficiency Diseases
There are three main causes of immunodeficiency...
Humoral Immune Responses

