CarrotStage

A calculation tool implementing the published TNM staging classifications. It reports only what those classifications define; it does not make diagnostic, prognostic or treatment judgements. A calculated stage is reference material; medical judgement must always be confirmed by the treating clinician.


■ About CarrotStage

CarrotStage is a TNM cancer staging calculator for healthcare professionals. Enter the staging elements — T, N, M and whatever else a chapter defines — and it returns the stage group. It follows AJCC 9th / UICC 9th, and the 8th edition where that is still current for a cancer.

It cuts out looking up and cross-checking staging tables at the point of care, and shows the reasoning alongside the result so it can be verified.


■ Coverage

The major cancers of the regions below. Coverage continues to expand.

Thorax: Lung, Diffuse Pleural Mesothelioma, Thymus

Head and neck: Nasopharynx, Oropharynx (HPV-associated and p16-negative), Hypopharynx, Larynx, Lip and Oral Cavity, Nasal Cavity and Paranasal Sinuses, Salivary Gland Carcinoma, Mucosal Melanoma of the Head and Neck, Cutaneous Carcinoma of the Head and Neck, Cervical Nodes & Unknown Primary

Female reproductive organs: Ovary, Fallopian Tube & Primary Peritoneal, Corpus Uteri Carcinoma, Corpus Uteri Sarcoma, Cervix Uteri, Vulva, Vagina, Gestational Trophoblastic Neoplasm

Upper gastrointestinal tract: Esophagus & Esophagogastric Junction, Stomach, Small Intestine

The current list is always available from the menu at the top of the app.


■ What it does

· Shows the reasoning, not just the answer
It shows step by step which criterion produced T2 rather than T3, so the result can be verified instead of taken on trust.

· Makes contradictory input structurally impossible
Choose carcinoma in situ and the nodal fields are disabled; with no nodes, the ENE switch locks. Impossible combinations are never formed.

· Keeps clinical and pathological apart
cTNM and pTNM use different criteria. Switching track switches the input fields to match.

· Does not hide its sources
Each cancer states the edition applied and the material behind it. Where sources read differently, a warning names the criterion this app applied.

· Korean and English, and a tablet layout
In landscape a tablet shows inputs and result side by side. On Android 13 and above you can set a language for this app alone.


■ Privacy

· Staging requires no internet connection
· Nothing you enter is stored or transmitted
· No accounts, no sign-in, no advertising, no usage analytics
· No device permissions are requested

Used where patient information is handled, the app has no communication path at all.


■ Who it is for

Physicians, pathologists, cancer registrars, medical trainees and other healthcare professionals. It is not a consumer health information app, and it is not a tool for patient self-diagnosis.


■ Sources

Staging criteria were implemented from the literature that published each classification and from official staging materials. Each screen states the edition applied and the nature of the evidence, so you can judge whether to check the original.

Classifications are revised over time. Please confirm the current criteria against the official materials of the responsible bodies.


■ Notices

This app is not affiliated with, endorsed by or certified by the AJCC (American Joint Committee on Cancer), the UICC (Union for International Cancer Control), the IASLC (International Association for the Study of Lung Cancer) or the CAP (College of American Pathologists).

For medical advice, diagnosis or treatment, always consult a qualified healthcare professional.


■ Developer

Developed by Mediprism.


■ Contact

mediprism@mediprism.net

Telling us the app version, device model and cancer concerned speeds things up. If a result seems to differ from the criteria, write to the same address.

■ User manual

https://mediprism.net/carrotstage/manual/