Multiple primary malignant neoplasms

Area of Science:

• Oncology
• Immunology

Background:

• Multiple malignant tumors are documented in medical literature, often through case reports or registry data.
• Previous studies have excluded specific cancer types like skin and certain gastrointestinal malignancies from multiple tumor analyses.

Purpose of the Study:

• To present a series of 71 cases of multiple malignant tumors.
• To review literature and explore potential etiological factors for multiple tumors.
• To emphasize the role of the tumor surveillance mechanism and its potential depression.

Main Methods:

• A personal series of 71 cases from hospital follow-up clinics.
• Exclusion of multiple skin tumors and specific intestinal growths.
• Literature review on etiological factors of multiple tumors.

Main Results:

• A series of 71 cases of multiple malignant tumors were identified and analyzed.
• Possible etiological factors were considered based on literature review.
• The importance of the tumor surveillance mechanism was highlighted.

Conclusions:

• Depression of the body's defense mechanisms, potentially by major surgery, may contribute to multiple tumors.
• Assessing a patient's immune defense mechanisms is as critical as tumor grading and staging.