The Vanishing Colorectal Tumor: Lessons from an Illustrative Case Report

Area of Science:

• Gastroenterology
• Oncology
• Pathology

Background:

• Colorectal cancer is a common digestive neoplasia diagnosed via colonoscopy.
• Treatment depends on cancer staging and may involve surgery, chemotherapy, or radiotherapy.

Purpose of the Study:

• To present a rare case of suspected spontaneous regression of colorectal cancer.
• To outline the diagnostic process and rigorous steps taken to confirm the phenomenon.

Main Methods:

• Colonoscopy for diagnosis and follow-up.
• Histopathological examination of biopsies and surgical specimens.
• Review of endoscopic records and genetic analysis for concordance.

Main Results:

• Initial diagnosis of ascending colon adenocarcinoma.
• Neoplasia absent in surgical specimen and follow-up colonoscopy.
• Rigorous investigation ruled out errors, supporting spontaneous regression.

Conclusions:

• Spontaneous regression of colorectal cancer is exceptionally rare.
• Confirmation requires meticulous exclusion of diagnostic and identification errors.
• This case highlights the importance of thorough investigation in rare oncological events.