NORCET -4 , 2023: The most common type of ovarian cancer is

NORCET -4 , 2023

Obstetrics & Gynaecology

Easy

Appeared in: NORCET -4 , 2023

Explanation

Epithelial ovarian cancer is the most prevalent form, accounting for approximately 90% of all ovarian malignancies.
These cancers originate from the cells covering the outer surface of the ovary, known as the ovarian surface epithelium.
This category is the broadest classification and includes several subtypes, such as serous, mucinous, and endometrioid tumors. Because it is the overarching group, it is correctly identified as the most common type.

Option A: This is a specific subtype of epithelial ovarian cancer. While it is a type of ovarian cancer, it is not the most common overall category.
Option C: This refers to endometrioid tumors, which are another subtype of epithelial ovarian cancer. The term can also be confused with cancer of the endometrium (uterine cancer).
Option D: This is a broad histological term for cancer that begins in glandular cells. While most epithelial ovarian cancers are adenocarcinomas, 'Epithelial ovarian cancer' is the more precise and primary classification based on the cell of origin.

Visual 1: Diagram - A cross-section of the ovary illustrating the different cell layers (surface epithelium, germ cells, stromal cells) to show the origins of the main types of ovarian tumors.
Visual 2: Pie Chart - A chart depicting the prevalence of ovarian cancer types, with epithelial tumors making up the largest segment (approximately 90%), followed by germ cell and stromal tumors.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Classification and prevalence of ovarian cancer types as background academic context rather than a clinical decision trigger.
Knowing that epithelial cancers are the most common type helps nurses anticipate the typical clinical presentation, standard treatment protocols (often involving surgery and platinum-based chemotherapy), and necessary patient education.
Nurses play a crucial role in recognizing the often vague symptoms of ovarian cancer, such as persistent bloating, pelvic or abdominal pain, difficulty eating, or feeling full quickly, and advocating for timely gynecologic evaluation, especially in postmenopausal women.
What if? If a patient has a known BRCA1 or BRCA2 gene mutation, her lifetime risk for epithelial ovarian cancer increases dramatically. The nurse's role then expands to include education on risk-reducing strategies like prophylactic oophorectomy and enhanced screening protocols.

How to Approach the Question

First, identify the key phrase in the question: 'most common type'. This indicates you need to find the category with the highest prevalence.
Next, analyze the given options. Recognize that some options may be specific subtypes of a broader category. For instance, 'Mucinous adenocarcinomas' and 'Endometrial tumors' are specific histological types.
Recall the main classifications of ovarian cancer, which are based on the cell of origin: epithelial, germ cell, and sex cord-stromal.
Compare the options to these major classifications. 'Epithelial ovarian cancer' represents one of these primary, broad categories.
Conclude that the broadest category that accounts for the vast majority of cases (around 90%) is the correct answer, rather than one of its own subtypes or a more general histological term like 'adenocarcinoma'.

Concept Tested & Keywords

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