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Megathrombocytopenia associated with glomerulonephritis, deafness and aortic cystic medianecrosis
Abstract:
Macrothrombocytopenia associated with glomerulonephritis and deafness has only been reported in a few patients since it was first described in 1972. We present a patient with macrothrombocytopenia, glomerulonephritis, progressive uraemia and progressive sensorineural deafness associated with cystic medianecrosis of the ascending aorta and malformation of the aortic valves. The patient had consistently low platelet counts but no clinical signs of a defect haemostasis. The giant platelets were characterized by their size, averaging 11 micron in diameter, elaborate maze-like membrane formations, abundance of microtubules, and the total absence of very dense granules.
Insights
This study details a rare case of macrothrombocytopenia, glomerulonephritis, and deafness, linked to aortic abnormalities. Giant platelets lacked dense granules, offering new insights into this syndrome.
Area of Science:
- Hematology
- Nephrology
- Genetics
Background:
- Macrothrombocytopenia with glomerulonephritis and deafness is a rare condition, first described in 1972.
- Few cases have been reported globally, highlighting its rarity and the need for further study.
Observation:
- A patient presented with macrothrombocytopenia, glomerulonephritis, progressive uremia, and sensorineural deafness.
- Aortic abnormalities, including cystic medianecrosis of the ascending aorta and malformed aortic valves, were also noted.
- Despite low platelet counts, the patient showed no clinical signs of impaired hemostasis.
Findings:
- Giant platelets averaged 11 microns in diameter.
- These platelets exhibited elaborate, maze-like membrane formations and abundant microtubules.
- A significant finding was the complete absence of very dense granules in the giant platelets.
Implications:
- This case expands the known clinical spectrum of this rare syndrome.
- Understanding the ultrastructural platelet defects may offer new diagnostic or therapeutic avenues.
- Further research into the genetic and molecular underpinnings is warranted to clarify the pathogenesis.