What condition was Prince Louis being treated for according to Buckingham Palace on Dec 15 2025?

1. What Buckingham Palace said — what the available reporting shows

The supplied items document Palace and family commentary about Princess Kate’s cancer diagnosis and recovery, and reporting about how the three children — George, Charlotte and Louis — have been affected; they do not contain a Buckingham Palace press release or statement that says Prince Louis himself was being treated for any named medical condition on 15 Dec 2025 (available sources do not mention a Palace statement identifying a treatment for Prince Louis) ^{[3] [1] [2]}.

2. The dominant narrative in these sources: the mother’s illness, not the child’s

Multiple pieces in the dataset frame the story around Princess Kate’s cancer diagnosis, its treatment and remission, and the family’s private handling of that illness; outlets highlight how the children experienced a “frightening” period during their mother’s treatment and how William and Kate have shielded and supported them, but they stop short of reporting that Prince Louis had a separate medical condition or treatment endorsed by Buckingham Palace ^{[3] [4] [2]}.

3. Specific factual items the sources do confirm

Reporters in the supplied links note that Princess Kate disclosed a cancer diagnosis and later said her cancer is in remission ^[1]. Coverage references Prince William discussing how the children have been spoken to about their mother’s illness and portray the siblings as resilient; none of these items assert that Louis himself required or received treatment for a named condition ^{[5] [2] [6]}.

4. What is not in the reporting — and why that matters

No source in the provided set contains a Buckingham Palace communiqué stating that Prince Louis was undergoing treatment for a medical condition on 15 Dec 2025. Because the dataset contains multiple mainstream outlets (People, BBC, Today, Marie Claire, E! and regional outlets) making clear statements about the family’s situation, the absence of any Palace announcement about Louis is notable: the available reporting concentrates on Kate’s health and the family impact, not a separate medical disclosure about their son ^{[7] [1] [2]}.

5. Alternative possibilities and how to verify

Either (a) Buckingham Palace did not issue any statement naming a condition for Prince Louis on that date, or (b) such a statement exists but is not included in the provided search results. To resolve which is true, consult primary sources — Buckingham Palace press releases, official Kensington Palace social channels, or wire services’ archives for 15 Dec 2025 — none of which are present in the current dataset (available sources do not mention a Palace statement identifying a treatment for Prince Louis) ^{[7] [2]}.

6. Misinformation risks and how reporting has treated the children

The supplied material shows how easily narratives can shift from a parent’s medical disclosure to speculation about children; a number of outlets emphasize the children’s “frightening” experience during Kate’s treatment and the family’s privacy. Absent an explicit Palace statement, any claim that Prince Louis was being treated for a specific condition on 15 Dec 2025 should be treated as unverified ^{[3] [4] [5]}.

7. Bottom line for readers

Based on the sources you provided, Buckingham Palace did not publicly say that Prince Louis was being treated for any particular condition on 15 Dec 2025; those sources instead report on Princess Kate’s cancer diagnosis, treatment and remission and on the family’s experiences ^{[1] [2] [3]}. If you want confirmation beyond these items, consult the Palace’s official releases or contemporaneous wire-service reports not included in this dataset.