---
title: "2026-08-25 PESO and LEOPARD vxData schema inspection"
description: "Inspected current vxData Create schemas and recent histopathology jobs to propose valid PESO and LEOPARD resource modeling."
image: "https://docs.virdx.dev/img/virdx-social-card.png"
---

> Documentation Index
> Fetch the complete documentation index at: https://docs.virdx.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# 2026-08-25 PESO and LEOPARD vxData schema inspection

## Work Done

- Inspected `packages/vxdata-schemas` generated Create models and payload definitions for DataSource, Patient, PathologySpecimen, PathologyAssessment, HistoScan, HistoMap, PatientStatus, and Measurement.
- Compared recent histopathology integrations including PANDA, ACROBAT, BRACS, and Frankfurt to identify current parentage, identifiers, provenance, and patient-registration conventions.
- Inspected PESO Zenodo record 5137717 and its test mapping, plus the LEOPARD challenge data description and public training labels.
- Verified a public LEOPARD tissue TIFF uses binary values 0 and 1.
- Reported exact constructors and enums without editing the monorepo. Flagged that no typed censored time-to-event outcome resource currently exists, and that PatientStatus `other_data` is only a temporary lossless fallback for LEOPARD biochemical-recurrence follow-up.

## Lessons Learned: Pitfalls

- The existing histo workstream SOP index does not describe dataset-ingestion schema choices; the related infrastructure vxData SOP would have been the more direct starting point.
- Prostatectomy WSI does not establish `block_format=WHOLE_MOUNT`; source descriptions that say several physical slides are packed into one TIFF make that inference especially unsafe.
- PESO's cancer/non-cancer labels apply to regions, not specimen-level clinical significance, so they must not be mapped to `PathologyAssessment.is_cspca`.

## Lessons Learned: Improvements

- Add a concise current-schema table to the vxData ingestion SOP, including exact Create class names, required fields, and enum casing.
- Document a standard approach for pseudo-patients when public histology datasets expose one slide/case identity but no patient mapping.
- Add a dedicated typed censored time-to-event outcome payload with endpoint name, event indicator, duration, unit, and censoring semantics before integrating survival/challenge datasets such as LEOPARD.

Source: https://docs.virdx.dev/knowledge/inbox/2026-08-25-histo-peso-leopard-vxdata-schema-inspection/index.mdx