[Essential thrombocythemia with Philadelphia chromosome]

Area of Science:

• Hematology
• Oncogenesis
• Cytogenetics

Background:

• Essential thrombocythemia (ET) is a myeloproliferative neoplasm.
• ET is characterized by elevated platelet counts.
• ET typically lacks consistent cytogenetic abnormalities.

Observation:

• A 38-year-old woman presented with gastrointestinal bleeding and thrombocytosis.
• Clinical and hematological findings were consistent with ET.
• The Philadelphia chromosome (Ph1) was detected in bone marrow samples.

Findings:

• The patient had ET with the presence of the Ph1 chromosome.
• The Ph1 chromosome persisted over two years and four months.
• ET diagnosis was confirmed, excluding other myeloproliferative diseases.

Implications:

• The presence of Ph1 in ET may indicate a unique disease course.
• This finding suggests a potential relationship between Ph1 and ET progression to chronic myelogenous leukemia (CML).
• Further research is warranted to explore the role of Ph1 in ET pathogenesis.