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Epidemiological and Clinical Aspects of Early-Onset Colorectal Cancer: A Comparative Study of 180 Cases
Hajer Hassine1, Nesrine Krifa1, Amin Sebei2
1Department of Gastroenterology "B", La Rabta University Hospital, Tunis, Tunisia. Faculty of medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.
Introduction:
The incidence of early-onset colorectal cancer (EO-CRC), defined as occurring before 50 years, is rising significantly. While genetic syndromes account for a minority of cases, the majority are sporadic and influenced by both genetic and environmental factors. This study aimed to identify the epidemiological and clinical characteristics of EO-CRC.
Methods:
We conducted a single-center, retrospective, comparative study over seven years, including all patients diagnosed with colorectal cancer (CRC). Patients were classified into two groups: <50 years (G1) and ≥50 years (G2). Clinical data, tumor characteristics, and treatment strategies were compared.
Results:
Among 180 patients, 26.1% were under 50 years (G1). No significant differences were observed in sex ratio, smoking, alcohol consumption, obesity, or family history of cancer. Both groups presented with bowel transit disorders and general health deterioration, but diarrhea (p = 0.015) and rectal bleeding (p = 0.026) were more frequent in G1. Rectal localization was significantly more common in G1 (p < 0.001). Histologically, EO-CRC was more often poorly differentiated, exhibited greater lymph node involvement, and was diagnosed at more advanced stages, though differences were not statistically significant. A curative approach was more frequently proposed in younger patients, without significant difference.
Conclusion:
EO-CRC represented over one-quarter of CRC cases in our cohort. It was predominantly rectal and frequently diagnosed at an advanced stage. These findings highlight the need for increased awareness, early diagnosis, and tailored management strategies for younger patients.
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