Exploring the Relation Between Coexisting Chronic Lymphocytic Leukemia and Lung Cancer: Two Case Reports

Area of Science:

• Oncology
• Hematology

Background:

• Chronic lymphocytic leukemia (CLL) is a slow-growing blood cancer.
• Patients with CLL have a higher incidence of second primary malignancies (SPMs).
• The link between CLL and SPMs, particularly lung cancer, is not well understood.

Purpose of the Study:

• To report two rare cases of synchronous CLL and lung cancer.
• To explore potential shared risk factors and biological associations between CLL and lung cancer.
• To emphasize the need for further research into the CLL-lung cancer relationship.

Main Methods:

• Case report of two patients with CLL and lung cancer.
• Review of clinical presentation, diagnostic findings (cytology, biopsy, flow cytometry), and outcomes.
• Discussion of potential shared risk factors like smoking and immune status.

Main Results:

• Two patients (77-year-old male, 52-year-old female) with heavy smoking history presented with lung cancer and CLL.
• Both cases showed advanced disease with rapid progression and fatal outcomes.
• Neither patient had previously suggested genetic links like Trisomy 12.

Conclusions:

• CLL and lung cancer share risk factors, notably smoking.
• The immunocompromised state in CLL may contribute to SPM development.
• Further investigation is crucial for early lung cancer detection in CLL patients.