Oncology is the branch of medicine that deals with the study, treatment, diagnosis, and prevention of cancer. At the cellular level, cancer begins with carcinogenesis, a multi-step process where normal cells undergo genetic mutations that allow them to multiply uncontrollably. These mutations disrupt the normal cell cycle, overriding apoptosis, which is programmed cell death.
The transformation happens in three main stages:
Primary prevention focuses on stopping the development of cancer before it ever starts by eliminating or reducing exposure to known risk factors. Nurses play a critical role in educating communities about modifiable lifestyle choices.
Key primary prevention measures include:
Secondary prevention centers on early detection and prompt intervention to halt the progress of disease in asymptomatic individuals. When cancer is identified in its earliest stages, treatment is often simpler, less invasive, and associated with higher survival rates.
Screening tests are the backbone of secondary prevention. An effective screening tool must be safe, cost-effective, acceptable to the target population, and able to detect cancer before symptoms develop. Examples include cervical cytology like the Pap smear, mammography for breast tissue, and stool-based tests for colorectal cancer. Nurses must understand that screening is performed on healthy people, whereas diagnostic testing is performed on individuals who already present with suspicious symptoms.
In Nigeria, the burden of cancer is rising, with breast and cervical cancers leading among women, and prostate cancer affecting a high number of men. Due to resource constraints and late presentation, localized screening initiatives face unique logistical challenges.
Public health policies recommend specific localized strategies:
Recognizing the early warning signs of cancer is essential for timely medical referral. The American Cancer Society popularized the acronym CAUTION to help clinicians and the public remember key clinical manifestations:
Systemic symptoms such as unexplained weight loss, chronic fatigue, persistent fever, and night sweats also warrant thorough clinical investigation.
When screening or warning signs point toward a potential malignancy, a definitive diagnostic workup is initiated. The definitive diagnosis of cancer almost always requires a biopsy, where tissue samples are obtained and examined under a microscope by a pathologist to identify cellular abnormalities.
Once cancer is confirmed, staging determines the extent of the disease within the body. The most common system is the TNM classification:
Accurate staging guides treatment planning, helps predict patient prognosis, and allows healthcare teams to communicate clearly across disciplines.
Nurses occupy a frontline position in cancer control, bridging the gap between complex medical science and community understanding. In clinical settings, nurses provide pre- and post-test counseling, prepare patients for diagnostic procedures, manage treatment side effects, and offer empathetic emotional support.
Beyond individual bedside care, nurses spearhead public health advocacy. They dispel cultural myths and stigmas surrounding cancer, which are common barriers to early reporting in Nigeria. By organizing community outreach programs, teaching self-examination techniques, and advocating for accessible screening services, nurses empower individuals to take charge of their health and reduce the national cancer burden.