JUNE, 22-23 2023 Wroclaw, Poland

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Dear Friends and Colleages,
Dear Members of the SIOP RTSG Association,
Dear Doctors interested in the RTSG activities, 

The Annual Meeting of the SIOP RTSG is rapidly approaching. Please have a look on the preliminary program and the list of associated events and feel more than welcome to Poland.

Regarding the war at our east border – thus far we did not experience any cross-border attacks.

Please consult the list of suggested hotels – all are in a walking distance from the venue which is DIL (Dolnośląska Izba Lekarska = Lower Silesian Chamber of Doctors) Kazimierza Wielkiego 45 str.

Those of You who already visited Wroclaw for previous meetings will not be surprised – the venue and many hotels are the same and very nice!!

The main meeting runs from June 22nd to June 23rd, but 2 days before (June 20th), interested surgeons are invited for a course on renal tumour surgery which will take place in Marciniak Hospital (Fieldorfa 2 str.) One day before (June 21st ) our Steering Committee and Executive Board will meet in a closed meeting.


Although we appreciate every ones attendance LIVE, there will be a Zoom link provided for those of you that are not able to attend in person, for the general meeting.

The surgeons are also notified by Prof . dr. Jan Godzinski directly.


Dear Friends, please note that SIOP RTSG has become an Association. Of course both members and non-members are cordially welcome to Wroclaw, but for plenty of rights (like voting in elections or to be elected for an official position) You cordially are invited to become a member. It is very easy and not charged with any high fee (60 Euro a year), see the application for RTSG membership form attached. For (full, associate and honorary) members of SIOP-RTSG there will be no registration fee.

For those of you that are not members, we advise you to sign up as member now, as the registration fee for this Annual Meeting will be 60 euro for non-members (similar to the annual membership fee). Again, for that purpose, you will find the membership form attached (with the concept program.


Wroclaw is a cosmopolite city with a number of historical buildings and a beautiful old market. I believe that those of You who decided to stay a little bit longer will spend a charming time walking through the mysterious parts of the old town or tasting delicious food in numerous restaurants.

Please consider to stay on until Saturday, as the YIs are preparing a great Friday evening (including dinner) for us, and Jan has organised a social program on the Saturday morning.
For those who stay Saturday 24th of June we will organize a half-a-day trip through magic parts of Lower Silesia and Castle Książ.

Again, welcome, to You All !!!!, wishing you a wonderful spring time

Best wishes,

Prof. dr. Marry M. van den Heuvel-Eibrink, Chair of the SIOP RTSG
Dr Arnauld Verschuur Vice Chair of the SIOP RTSG
Prof. Dr. Norbert Graf Past Chair of the SIOP RTSG
Prof. Jan Godzinski – local organiser, Chair of the Panel of Surgeons (SIOP RTSG)



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Day 1. Thursday 22nd of June 2023

Morning: Subcommittee and Panel meetings (parallel) OPEN

8.00 Registration open

8.30 – 10.00 Subcommittee and panel meetings
Simultaneous sessions:

  • Stage V committee
  • Non-WT committee
  • DM committee
  • RT session

10.00 – 10.30 Networking Coffee break

10.30 – 12.00 Subcommittee and panel meetings

Simultaneous sessions:

  • Relapse/New Agents committee
  • Stage IV committee
  • Surgical panel

12.00 – 13.15 Lunch break

Afternoon I (Moderators: A Verschuur and MM van den Heuvel-Eibrink)

13.15 – 13.30 Welcome (MM van den Heuvel-Eibrink and J Godzinski)15”
(INTRODUCE attendees of the participating countries (National coordinators: bring a national flag !) and chairs of panels and subcommittees

13.30-13.40 Welcome by an official from Polish Society of Pediatric Hematology-Oncology (Bernarda Kazanowska, Krystyna Sawicz-Birkowska)10”

13.40 – 14.55 SIOP-RTSG developments and updates on trials


  • UMBRELLA Report, and missing forms (R. Dandez, P Roy and H. van Tinteren)15’’
  • Database developments (SIOP-RTSG (Minke’s) database (1993-2023) (I. Schut)10”
  • UMBRELLA 2.0 Amendment: highlighting the modifications (N.Graf)10”
  • UMBRELLA grant proposal (FKC) and plans for start completing data and analysis primary study question 2023-2025 (MvdHE) 10”
  • Attract call proposal IMPACT study (F. Spreafico/A. Mavinkurve) 10”

2. Randomet 15”(R Furtwangler/A.Verschuur) 10”

3. Revisited Logistics for SIOP-RTSG Research proposals in SIOP-RTSG (M. Gessler and Tan Chowdhury) 10””

14.55-15.40. Ongoing research projects in SIOP-RTSG (10’’presentation and 5”  discussion per presentation)

  • Subtotally necrotic WT and influence on outcome (G Vujanic)10”
  • Stage V WT, SIOP2001 results (H Sudour/ R. Furtwangler)10”
  • Blastemal volume, benefit over Blastemal type? (R Furtwangler)10”

15.45 - 16.30 Networking tea break

Afternoon II (Moderators: N. Graf and R. Furtwangler)

16.30 – 17.45 Difficult cases Presentation and interaction (10”presentations and 5” discussion each)

1. Kaira Osmeña (Philippines): Tumor spill in localized bilateral Wilms Tumor (sent by Shui Yen / Singapore)
2. Ladislav Deák / Slovakia: Nephroblastomatosis
3. Andreas Schmidt /Germany: Bilateral Wilms Tumor – NSS and autotransplantation
4. Takaharu Oue / Japan: Difficult case of kidney tumor
5. Nada Rajacic / Croatia A case of nephroblastoma with non-typical comorbidities and complications

Summarizing closing discussion 15”

18.00-18.30 Future directions UMBRELLA 3.0, “It’s time to start the future now””(MVDHE/AV)

18.30 Wrap up and Announcements of social evening program (J Godzinski)

19.30 Dinner: Restaurant Spiż, Rynek Ratusz 2*
*optional event

Day 2. Friday 23rd of June 2023

Morning session I: General Assembly, M.M. van den Heuvel-Eibrink and A Verschuur

8.30 - 9.30 General Assembly (full members only)

  • Welcome (MvdHE) 1”
  • Financial report (H. van Tinteren) to be approved 10”
  • HR and fundraising (AV) 10”
  • SIOP-RTSG Association: (MvdHE) 9 ”
    • Looking back on the first year

    • Personnel/staff changes/functions 2023/2024

  • Important achievements/news from subcommittees and panels (1 slide from all chairs to be sent to presenter (AV) )10’’
  • International collaborations SIOP-RTSG with outside partners (MVDHE) 10’’
  • Discussion and suggestions by members 10”


9.35 - 10.35 Presentation of new participating SIOP-RTSG countries (Slovenia, Lithuania, Japan, Latvia, Argentina) 10”each.
Summarizing discussion 10”

10.40 – 11.00 Lecture. Correlation of tumor shrinkage with histology in BWT (A. Davidoff).

11.00 – 11.30 Networking Coffee break

Morning session II : YIs and patient advocacy, (Moderators: C. Koenig and F. Spreafico)

11.30 - 12.15 YIs
Introduction and overview experience of SIOP-RTSG YIs (C. Koenig) 10”
Presentations by YIs as an example of the activities (2 of the abstracts)

  • Surgery and local control (K. Dzhuma) 10”
  • Stage IV (B Dumont) SIOP 2001 10”
  • Discussion 15”

12.15 - 12.25 Parent advocacy and international collaborations (A Polanco)10”
12.25 - 12.35 BENCHISTA international benchmarking of survival (Kathy Pritchard-Jones) 10”
12.35- 12.50 Discussion 15””

12.50 – 14.00 Networking Lunch

Afternoon session: Research in pediatric renal tumors in perspective, Moderators: T Chowdhury and M Gessler

10 min presentations and 5” discussion

14.00-14.15 Histological proof always necessary in unilateral WT (N. Welter)10”
14.15-14.30 Liquid biopsies and WGS (J. Sprokkerieft)10”
14.30-14.45 TRIM28 inactivation in epithelial WT (J. Wegert)10”
14.45-15.00 The Little Princess Trust Knowledge bank of WT (T. Treger)10”’

15.00-16.10 Tea break (poster viewing with presenters present* see below)

16.10-16.25 MRI DWI and predicting histology using a 3D cutting guide (J van der Beek & M Fitski) 10”.
16.25-16.40 WT in Central America (Thelma Velasquez via zoom) 10”
16.40-16.55 A SIOP-RTSG relapsed WT organoids feasibility study (A. Groenendijk) 10”

Announcements Meetings 2023-2024, 5”” (MvdHE/AV)

  • SIOP-RTSG 2024
  • tRCC Cincinatti , USA, 21-22 September 2023
  • SIOP Ottawa, 11-14 October 2023
  • SIOPe, Milano, 13-17 May, 2024
  • 12th International Pediatric Renal Tumor Biology Meeting, 5-7 June 2024, NYC,
  • SIOP, 17-20 October, 2024, Honolulu (HARMONICA) premeeting (16th October)

17.00 Wrap up (M.M. van den Heuvel-Eibrink and J Godzinski)

17.15 -18.30 Farewell drinks

19.00 Dinner evening on the river boat (optional event)
Start: Cardinal's Pier - P. Włostowica Boulevard (Przystań Kardynalska - Bulwar P. Włostowica)


Saturday 24th of June 2023

Social program in the morning (organized by J Godzinski) visit to Castle Książ (optional event)





Sarah Al-Jilaihawi



Rajvi Nagrecha



Nada Rajacic

Synchronous nephroblastoma and adrenocortical tumor in a 2,5-year old girl


Tom Jackson

Comparing routinely collected population level health data to a prospective clinical study of Wilms Tumour in England


Suzanne Tugnait



Michelle Li



Justine van der Beek

Diagnostic MRI characteristics of pediatric Clear Cell Sarcoma of the
Kidney and Rhabdoid Tumor of the Kidney: A retrospective multicenter
SIOP-RTSG Radiology Panel study


Sarah Braungart

Wilms Tumour presenting with perforated but missed appendicitis


Joanna Stefanowicz

Simultaneous ALL and WT in one patient- a therapeutic challenge


Prakriti Roy/Sophie van Peer

The influence of COVID 19 on presentation of WT (P.Roy/S van Peer)10”poster?


Julia Sprokkerieft

RCC response to TKIs (JS) 10”’ poster ?


Thelma Velasquez

Wilms Tumor & WAGR Syndrome.



Dolnośląska Izba Lekarska
ul. Kazimierza Wielkiego 45
50-077 Wrocław


How to register for SIOP RTSG WROCLAW MEETING (concise manual for new users)

  1. If you want to be a participant of SIOP RTSG WROCLAW MEETING we kindly ask you for registration on the website
  2. If you are new user please choose „REGISTER” option.
  3. Complete registration form and click “REGISTER” 
  4. After creating an account, please click „Go to events” option and then you choose „SIOP” from the Current Events list.
  5. Now you are pleased to:
    • fill all the fields with information about participant
    • choose payment document (Invoice or Receipt)
    • choose additional registration fee (optional events)
  6. After choosing consent and declarations, click „JOIN” option.
  7. Congratulations! Now your application is complete.
  8. Registration confirmation and information about payment will be sent to your e-mail once you are registered.

Information for participants who are not a member, but would like to become a member of SIOP Association
Ladies and Gentelmen,
every participant, who chose option „I am not a member, but would like to become a member and will pay membership fee”, will get e-mail with payment details, membership instruction and „SIOP RTSG Membership Application” as attachment. 
This e-mail will be sent next business day after proper registration on website

Information about participation online

will be available on-line, transmitted in real time and participation in it will be free.
Information about website and registration to participation „on-line” will be available on the 19th of June. 


(mini brewery and restaurant)
Rynek Ratusz 2

22.06.2023, 19:30*

*optional event, additional fee



The Patio Old Town Hotel is an intimate hotel located in a historic tenement house, with the best location in Wrocław. It is located 50m from the Wrocław Market Square, in the very center of the bustling old town, in one of its most beautiful streets. The unique architecture of the hotel combines the beauty of the 19th century façade with a futuristic interior.

ul. Kiełbaśnicza 24
50-110 Wrocław, Polska
+48 71 6613586

+48 71 3750400


The hotel is offering special rates for the Meeting participants from 19 till 25.06.2023.

Prices include: breakfast, all taxes, WIFI access, tea and coffee making facilities and mineral water in the room.
Check-in begins at 15:00 on the day of arrival and ends at 11:00 on the day of departure.

Reservations with the special price will be made until 31.05.2023. This is a non-refundable offer with 100% prepayment.


The password for email / phone / direct booking is: ONCOLOGY.



Bringing together modern design, premium comfort, and mouth-watering gastronomy, PURO Wrocław is your gateway to the city beyond. Combining local charm with a creative spirit to bring you a refined yet playful experience, we're here to help you stay in and unwind or head out and explore.

ROOMS: Modern, elegant, and sophisticated, we blend past and present to bring you an experience that's oh so stylish and big on comfort. Bathed in natural light and furnished with the comfiest of beds, our rooms are filled with retro furnishings and just that litlte bit lavish to help you unwind in style.

Pawła Włodkowica 6
50-072 Wroclaw, Poland

+48 71 772 51 00



Europeum is an intimate and stylish boutique hotel located in the centre of Wrocław, just a 5-minute walk from the Market Square. We invite you to our elegant and friendly hotel in the heart of the city, on Kazimierza Wielkiego Street - one of the oldest streets in Wroclaw, close to the bustling Market Square. The unique location in the historic centre of Wroclaw, among historic tenement houses, combined with unique, stylish interiors, artist author's works and professional and friendly service makes our guests return to us so often.

Kazimierza Wielkiego 27A
50-077 Wrocław Poland

tel. +48 71 371 44 00, +48 515 428 458;



Hotel Monopol Wrocław is a 5 star hotel in the heart of Wroclaw. Place where art meets business and the modern interior design blends in with the oldest hotel building in city of Wroclaw. Marble interiors, fresh flowers, professional and friendly Staff, relaxing Spa and delightful restaurant. All that will make your stay an unforgettable journey to world of luxury and pleasure.

Heleny Modrzejewskiej 2
50-071 Wrocław


+48 71 77 23 777



A warm welcome to The Granary – La Suite Hotel, a unique place in the center of Wrocław where our superb service, carefully selected amenities and distinguished atmosphere are tailored to your needs and expectations. Professional staff, luxuriousness and personalized service ensure your stay will be simply unforgettable…

The Granary hotel guarantees a level of luxury and comfort rarely attainable by the conventional hotels. This unique 16th century building situated in the very heart of the city has been conscientiously restored and transformed into a boutique hotel offering 46 exclusive suites and apartments.

The Granary perfectly combines the tactile qualities of a historic building with the sleekness of contemporary décor. The quality of design with unique selection of fabrics, facilities and services indicate our involvement in providing the highest standards of hospitality.

Only with us will you discover your “home away from home and office away from office.”

Mennicza 24,
50-057 Wroclaw
Tel.: + 48 71 395 26 00 (Concierge 6 01)


6. Hotel Mercure Wrocław Centrum ****

A hotel for travelers seeking a local and authentic experience.

Welcome to the Mercure Wroclaw Centrum Hotel. Here, a smiling and helpful staff, a pleasant atmosphere, and delicious food await you. Together with the entire team, I cordially invite you and wish you a pleasant stay.” MILENA KOZIK, Hotel Director

Mercure Wroclaw Centrum is not only an accommodation in the very center of the Old Town, a step away from the most important places, but above all a crew that meets all expectations and creates a great atmosphere. Relax in one of 151 modern rooms, among which you will find themed rooms that inspire you. Taste the unusual ideas of our Chef at the Winestone Restaurant, and hold your meeting in a conference room that will be tailored to your needs.

The Mercure Wroclaw Centrum is the perfect place for tourism and business. The hotel has an excellent location in the very center of the city, near the train and bus stations, right next to the historic Market Square and the city's cultural attractions (theaters, opera) and in the vicinity of the Dominican Gallery.

Wroclaw, is the capital of Lower Silesia, an extremely charming city, full of historic houses, with a specific atmosphere. The market square in Wroclaw is one of the largest in Poland.

pl. Dominikański 1
50-159 WROCŁAW
GPS:51.108999, 17.03957

Telefon+48 71 323 27 00
Faks+48 71 344 36 81



Located in the heart of the city. The Grand City Hotel is a new, unique facility on the map of Wrocław. The favourable location in the street 1 Rzeźnicza makes the hotel ideal for business and holiday trips. The 4* Hotel GRAND CITY is located in the historic apartment building "Pod Zielonym Dębem and Kamiennym Preclem" in the heart of the old town, only 50 metres from the Wroclaw market square.

ul. Rzeźnicza 1, 50-129 Wrocław

+48 71 308 44 44



Settle into the heart of vibrant Old Town, minutes from must-sees like Market Square and St. Elizabeth’s Church as well as events at Centennial Hall, the campus of the University of Wroclaw, and shopping at Galeria Dominikańska. Despite its historic location, Wyndham Wroclaw Old Town provides a modern retreat with sleek Polish architecture and a central glass atrium that lets in plenty of natural light. Stay satiated with our restaurant and room service, work out in the fitness center, and enjoy indulgent downtime in the spa featuring a hot tub and sauna. You’ll love escaping to one of the 205 welcoming guest rooms and suites, thoughtfully appointed with a flat-screen HDTV, minibar, ample workspace, and other convenient comforts. A world-class destination for business and vacation travelers, our non-smoking hotel simplifies your stay with extras like free high-speed WiFi, paid parking, and a work area in the lobby. If you’re planning a meeting, wedding, or celebration, 11 premier event venues can accommodate up to 1,120 conference guests and 150 banquet guests. 

Swietego Mikolaja 67
Wroclaw 50-127, Poland



Welcome to our intimate 4-star hotel, where rooms and suites decorated in a vintage style and in the very heart of Wrocław await you. Our interiors are decorated in subdued colours in the spirit of bygone years, which allows for a unique break from everyday life and even a kind of time travel. A hearty buffet breakfast is served every morning, which also includes fresh hot dishes prepared on request. Come to visit us and you are sure to fall in love with our unique atmosphere of hospitality.

ul. Kiełbaśnicza 2
50-108 Wrocław
telefon: +48 71 372 34 15



Rich in culture and picturesque charm, Wroclaw draws countless visitors every year. By basing yourself at the Radisson Blu Hotel, Wroclaw, you'll be just a few minutes' walk from major attractions, shops, restaurants and other businesses, helping you make the most of your stay in this beautiful Polish city.

Convenient accommodation near the Market Square

Our Wroclaw hotel is located near the historic Market Square, at the heart of the city, as well as popular sites such as the Panorama of Raclawice and the National Museum. If you're visiting Wroclaw on business, you'll also appreciate our proximity to Dominikanski Square - plus the local airport is just 11 kilometers away.

Savor freshly prepared Polish cuisine at Aquarelle Restaurant, and take advantage of convenient services such as underground car parking, a business center and a 24-hour fitness center. Numerous parks and river walks surround the hotel and provide optimal routes for walking or jogging.

+48 713 750 000

+48 713 750 010

+48 713 750 037

+48 713 750 026

+48 713 750 075



Find us in the OVO Wroclaw complex, overlooking Slowacki Park. We’re a 10-minute walk from the city center, Old Town Market Square, and the National Museum. Galeria Dominikańska tram stop is a block away, and we can arrange a taxi transfer to Copernicus Airport. Enjoy complimentary access to an indoor pool and spa at Holmes Place, in our shared building.

Podwale 84
Wroclaw, 50-414, Poland



Altus Palace Hotel is located in the historic building of the former Leipziger Palace, in the neighbourhood of the beautiful Old Town Garden, just next to the biggest attractions of the city – the Old Market Square, Wroclaw Opera House, Puppet Theatre, the famous Wroclaw Zoo and Ostrów Tumski (i.e. the Cathedral Island). The meticulously restored historical interiors have been enriched with modern, artistic arrangements, which preserve the palace’s unique atmosphere and offer great comfort. This is a place you will fall in love with straight from the get-go.

Wierzbowa 15
50-056 Wrocław, PL

+ 48 717475000


13. AC Hotel by Marriott Wrocław ****

Plac Wolności 10
Wrocław 50-071
Phone: +48716614000
Fax: 48716614000


14. QUBUS HOTEL ****

Qubus Hotel chain has been operating in Poland since 1996, developing a group of modern hotels for business and individual tourists in 11 Polish towns and cities. 

Qubus Hotel is the guarantee of comfort in both, leisure and work. All 11 of our 3 and 4-star facilities hold together 1210 rooms and 46 conference rooms, equipped with high-tech audio-visual equipment. There are exclusive restaurants in our hotels as well. Our Guests can also enjoy lobby bars and fully equipped Fitness Centres (swimming pools, saunas, gyms, relaxation rooms) in some of our facilities. Qubus Hotel is also a synonym of quality services. The “Inwestor w Kapitał Ludzki” (Investor in Human Capital) certificate awarded to our chain proves how much we care for our employees. Qubus Hotel chain is a reliable market brand that constantly develops its facilities. High standards, specialists with rich professional experience and efficient mechanisms supporting operation of the Hotel as well as sales results are the qualities that distinguish Qubus Hotel in the Polish hotel market.

ul. św. Marii Magdaleny 2, 50-103, Wrocław
tel.:+48 71 782 8 765


15. ART HOTEL ****

Kiełbaśnicza 20
50-110 Wrocław, Poland
tel. +48 71 78 77 100







Contact for Participants:
Olga Bąk