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Show HN: I'm a dermatologist and I vibe coded a skin cancer learning app

(molecheck.info)
422 points sungam | 6 comments | 07 Sep 25 10:38 UTC | HN request time: 0s | source | bottom

Coded using Gemini Pro 2.5 (free version) in about 2-3 hours.

Single file including all html/js/css, Vanilla JS, no backend, scores persisted with localStorage.

Deployed using ubuntu/apache2/python/flask on a £5 Digital Ocean server (but could have been hosted on a static hosting provider as it's just a single page with no backend).

Images / metadata stored in an AWS S3 bucket.

1. vindex10 ◴[07 Sep 25 14:33 UTC] No.45158481[source]▶
Hi! That's really useful tool!

I wish it also explained the decision making process, how to understand from the picture what is the right answer.

I'm really getting lost between melanoma and seborrheic keratosis / nevus.

I went through ~120 pictures, but couldn't learn to distinguish those.

Also, the guide in the burger menu leads to a page that doesn't exist: https://molecheck.info/how-to-recognise-skin-cancer

replies(3): >>45159338 #>>45161189 #>>45167123 #
2. sungam ◴[07 Sep 25 16:00 UTC] No.45159338[source]▶
This is very helpful feedback. I will add some more information to help with the diagnosis and add an article in the burger menu with detailed explanation.

Being honest I didn't expect anyone apart from a few of may patients to use the app and certainly did not expect front page HN!

replies(1): >>45161212 #
3. jgilias ◴[07 Sep 25 19:05 UTC] No.45161189[source]▶
Also came to the same conclusion. I want a mode where 50% of the set are melanomas, and the other 50% are “brown benign things”.
replies(1): >>45161687 #
4. jgilias ◴[07 Sep 25 19:08 UTC] No.45161212[source]▶
Hey!

Thanks for making this! A bit more polish and this is something I’d make sure everyone in my family has played with.

Imagine a world where every third person is able to recognise worrying skin lesions early on.

5. sungam ◴[07 Sep 25 20:08 UTC] No.45161687[source]▶
Will add this in next version!
6. addandsubtract ◴[08 Sep 25 11:45 UTC] No.45167123[source]▶
I'm not a doctor, but there's an ABCDE[0] rule of thumb to spot signs of skin cancer:

Asymmetry: One half of the spot is unlike the other half.

Border: The spot has an irregular, scalloped, or poorly defined border.

Color: The spot has varying colors from one area to the next

Diameter: melanomas are usually greater than 6 millimeters, or about the size of a pencil eraser

Evolving: Changing in size, shape, color, or new symptoms (itching, bleeding)

[0] https://www.aad.org/public/diseases/skin-cancer/find/at-risk...