What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 84903-4: Extraprostatic extension extent Ql (Prostate tumor)

Name: LOINC Code 84903-4: Extraprostatic extension extent Ql (Prostate tumor)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:11.791Z

84903-4 is a LOINC code used to identify Extraprostatic extension extent Ql (Prostate tumor) in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Extraprostatic extension extent. It is commonly used with the system or sample type Prostate tumor.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Extraprostatic extension extent. It is commonly used with the system or sample type Prostate tumor.

When is it used?

Used in lab systems, EHRs, and clinical data exchange.
May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
Status: ACTIVE
Order vs observation: Observation

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Extraprostatic extension extent [Type] of Prostate tumor

Extraprostatic extension extent

Categorization of the extent of extraprostatic extension (EPE) as focal or non-focal (also called established or extensive). The identification of any EPE is important since both focal and non-focal EPE are associated with a significantly higher risk of recurrence. [PMID9712429] This term was created for, but not limited in use to, the Prostate Cancer (Radical Prostatectomy) Structured Reporting Protocol (2nd Edition, 2014) developed by the Royal College of Pathologists of Australasia (RCPA) for structured reporting of prostate cancer.

Cancer; EPE extent; EXT; Ordinal; PATHOLOGY; Point in time; Prost; Prostatic; PrT; Ql; Qual; Qualitative; Random; Screen; tumors; tumour; tumours; Typ

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Extraprostatic extension extent Ql (Prostate tumor)Extraprostatic extension extent [Type] of Prostate tumorEPE extent PrT QlExtraprostatic extension extentPATHExtraprostatic extension extent, Prostate TumorType

Frequently asked questions

Code details

Code84903-4

SystemLOINC

Display nameExtraprostatic extension extent Ql (Prostate tumor)

DescriptionExtraprostatic extension extent

Short nameEPE extent PrT Ql

ComponentExtraprostatic extension extent

PropertyType

TimingPt

System (specimen)Prostate tumor

ScaleOrd

ClassPATH

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.58

Last changed2.71

Consumer names

Extraprostatic extension extent, Prostate Tumor

Part names

Extraprostatic extension extentTypePtProstate tumorOrdPoint in time (spot)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.