Related Experiment Video
Updated: Nov 26, 2025

Time-lapse Imaging of Primary Preneoplastic Mammary Epithelial Cells Derived from Genetically Engineered Mouse Models of Breast Cancer
Published on: February 8, 2013
"Dial of a Clock" Search Pattern for Clinical Breast Examination.
Kush Raj Lohani1, Anurag Srivastava1, Devairakkam Anjaline Jeyapradha1
1Department of Surgical Disciplines, All India Institute of Medical Sciences, New Delhi, India.
The "dial of a clock" (DC) pattern in clinical breast examination (CBE) is the most sensitive method for detecting breast abnormalities. Trained nurses achieved the highest sensitivity using the DC pattern.
Area of Science:
- Oncology
- Radiology
- Medical Diagnostics
Background:
- Clinical breast examination (CBE) is crucial for symptomatic breast disease assessment.
- Four common CBE search patterns include dial of a clock (DC), vertical strips (VS), quadrant-wise (QW), and concentric circles (CC).
- The optimal CBE search pattern for sensitivity remains undetermined.
Purpose of the Study:
- To evaluate and compare the diagnostic performance of four CBE search patterns.
- To determine the most sensitive CBE search pattern for symptomatic breast disease.
Main Methods:
- A cross-sectional study involving 60 women with symptomatic breast disease.
- Three examiners (professor, resident, nurse) assessed women using four randomized CBE patterns.
- Findings were compared against breast sonography as the gold standard.
Main Results:
- The "dial of a clock" (DC) pattern consistently showed the highest sensitivity across all examiners.
- Sensitivity for DC ranged from 64.2% (resident) to 82.1% (nurse).
- The trained nurse examiner achieved the highest overall sensitivity.
Conclusions:
- The "dial of a clock" (DC) search pattern is the most sensitive for clinical breast examination.
- Healthcare professionals, particularly trained nurses, can enhance diagnostic accuracy with the DC pattern.
Related Concept Videos
Assessment of apical pulse
Assessing the apical pulse is a critical nursing procedure, particularly indicated for:
Assessing Body Temperature - Axilla
Step 1: Perform hand hygiene and put on clean gloves to maintain infection control and prevent cross-contamination.
Step 2: Prepare the patient by explaining the procedure to ensure understanding and cooperation. Ensure privacy, expose the axilla, and inform the patient that minimal movement is crucial for an accurate reading.
Step 3: Adjust the patient’s clothing to expose only the axilla. It minimizes...
Assessment of the Abdomen I: Inspection and Auscultation
The abdominal examination is a cornerstone of clinical medicine, serving as a critical tool in diagnosing various gastrointestinal (GI) diseases. It involves a systematic approach that includes inspection and auscultation, each with distinct yet complementary roles in assessing the abdomen. This article will delve into these two primary methods healthcare professionals use to examine the abdomen.
Inspection of the Abdomen
The first step in any abdominal examination is inspection....
Biological Clocks and Seasonal Responses

