LOINC Code 93800-1: 1p chromosome del/1q chromosome del FISH (Tiss) [# ratio]

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 1p chromosome deletion/1q chromosome deletion. It is commonly used with the system or sample type Tiss.

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
• Method: FISH

What it does not mean

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

Key facts

• 1p/1q chromosome deletion [# Ratio] in Tissue by FISH
• 1p chromosome deletion/1q chromosome deletion
• The ratio of chromosome 1p arm deletions to chromosome 1q arm deletions. Results are used to diagnose oligodendroglioma brain tumors and to determine best treatment options. Tumors with 1p/1q ratio <0.80 and ≥24% deleted cells are deemed deleted for 1p.
• 1q Del; Chromosom; Chromosomes; Del; Deletions; Fluorescent in situ hybridization; Molecular pathology; MOLPATH; MOLPATH.DELDUP; Number ratio; Point in time; QNT; Quan; Quant; Quantitative; Random; Tissue; Tissue, unspecified

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

Frequently asked questions