FQL is a query language that allows you to retrieve, filter and project data from any data source containing FHIR Resources. It brings the power of three existing languages together: SQL, JSON and FhirPath. It allows you to create tables and is useful for gaining insight and perform quality control.
This code system http://dktk.dkfz.de/fhir/onco/core/CodeSystem/GesamtbeurteilungResidualstatusCS defines the following codes:
| Code | Display | |
| RX | Vorhandensein von Residualtumor kann nicht beurteilt werden | |
| R0 | kein Residualtumor | |
| R1 | Mikroskopischer Residualtumor | |
| R1(is) | In-Situ-Rest | |
| R1(cy+) | Cytologischer Rest | |
| R2 | Makroskopischer Residualtumor |