A prostatic biopsy report reveals a Gleason score of 8 (4 + 4). What is the corresponding Grade Group classification of this tumor?

Appeared in: INI-CET EXAM -2026

Explanation

The Gleason score grades prostate cancer based on its microscopic architectural pattern, with scores ranging from 2 to 10.
The Grade Group system (1-5) was introduced by the International Society of Urological Pathology (ISUP) in 2014 to simplify the Gleason system and improve prognostic prediction.
A Gleason score of 8, which can be a sum of (4+4), (3+5), or (5+3), directly corresponds to Grade Group 4.
This grade indicates a high-grade, aggressive cancer with a significant risk of progression and metastasis.

Option A: Grade Group 2 corresponds to a Gleason score of 7, specifically with a primary pattern of 3 and a secondary pattern of 4 (3+4). This indicates an intermediate-risk cancer, but less aggressive than one with a primary pattern of 4.
Option B: Grade Group 3 corresponds to a Gleason score of 7, but with a primary pattern of 4 and a secondary pattern of 3 (4+3). This is considered more aggressive than Grade Group 2.
Option D: Grade Group 5 is the highest and most aggressive category. It corresponds to Gleason scores of 9 or 10.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Prostate Cancer Grading: Gleason Score and Grade Group Classification as background academic context rather than a clinical decision trigger.
Understanding the Grade Group is critical for nurses in oncology to anticipate the patient's prognosis, treatment plan, and educational needs.
A high Grade Group (like 4 or 5) signals aggressive disease, often requiring multimodal therapy (e.g., surgery plus radiation and/or hormone therapy) and intensive monitoring for recurrence.
Nurses play a key role in explaining these complex reports to patients and their families in understandable terms, managing treatment side effects, and providing psychosocial support.

How to Approach the Question

First, identify the key value in the question stem, which is 'Gleason score of 8 (4 + 4)'.
The question asks for the 'Grade Group classification'. This requires you to recall the specific conversion from the Gleason score to the Grade Group system.
Mentally (or by jotting down) the Grade Group scale: Group 1 (score ≤6), Group 2 (score 3+4=7), Group 3 (score 4+3=7), Group 4 (score 8), Group 5 (score 9-10).
Match the given Gleason score of 8 to its corresponding category in the scale.
A score of 8 falls into Grade Group 4.
Select the option that correctly identifies Grade Group 4.

Concept Tested & Keywords

Concept Tested: Prostate Cancer Grading: Gleason Score and Grade Group Classification
Stem keywords: prostatic biopsy, Gleason score 8, Grade Group classification
Lead-in keywords: What is

QFAJGwRSge4CeHIgcXDBfB

E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 981-983

E6 Medicine Harrison 22e Part 1 p. 739-741

Practise the full INI-CET EXAM -2026

Attempt every question from this paper in a timed mock, then review the full solution for each one.