David W. Lim MD PhD
@davidlimmd.bsky.social
MDCM MEd PhD FRCSC FACS
Breast surgical oncologist & Breast Centre Medical Director at Women’s College Hospital
#breastcancer scientist and Assistant Professor at University of Toronto #bcsm
📍Toronto, Canada
Breast surgical oncologist & Breast Centre Medical Director at Women’s College Hospital
#breastcancer scientist and Assistant Professor at University of Toronto #bcsm
📍Toronto, Canada
We had a great first panel highlighting “Post-surgical functional impairment” at the 1st #intermational #breastcancer #survivorship and #supportivecare #conference with speakers Dr Toni Zhong, Dr Margie McNeely, Dr Emma Mauti, patient advocate Michelle Audoin #bcsm
November 28, 2025 at 4:14 PM
We had a great first panel highlighting “Post-surgical functional impairment” at the 1st #intermational #breastcancer #survivorship and #supportivecare #conference with speakers Dr Toni Zhong, Dr Margie McNeely, Dr Emma Mauti, patient advocate Michelle Audoin #bcsm
Packed room for the 1st International #breastcancer #survivorship and #supportivecare #conference opened by Dr. Muna Al-Khaifi
Excited for the next 2 days of learning @jjonestoronto.bsky.social @uoftsurgery.bsky.social @sunnybrookhsc.bsky.social
Excited for the next 2 days of learning @jjonestoronto.bsky.social @uoftsurgery.bsky.social @sunnybrookhsc.bsky.social
November 28, 2025 at 2:06 PM
Packed room for the 1st International #breastcancer #survivorship and #supportivecare #conference opened by Dr. Muna Al-Khaifi
Excited for the next 2 days of learning @jjonestoronto.bsky.social @uoftsurgery.bsky.social @sunnybrookhsc.bsky.social
Excited for the next 2 days of learning @jjonestoronto.bsky.social @uoftsurgery.bsky.social @sunnybrookhsc.bsky.social
Looking forward to moderating these exciting sessions at the #BreastCancer Survivorship & Supportive Conference this week in Toronto! 🍁 #bcsm
Join the 300 attendees attending this Friday and Saturday 👇🏻
📆 November 28-29, 2025
📍The Westin Harbour Castle 🇨🇦
🔗 breast-survivorship-conference.ca
#bcsm
Join the 300 attendees attending this Friday and Saturday 👇🏻
📆 November 28-29, 2025
📍The Westin Harbour Castle 🇨🇦
🔗 breast-survivorship-conference.ca
#bcsm
November 22, 2025 at 7:18 PM
Looking forward to moderating these exciting sessions at the #BreastCancer Survivorship & Supportive Conference this week in Toronto! 🍁 #bcsm
Join the 300 attendees attending this Friday and Saturday 👇🏻
📆 November 28-29, 2025
📍The Westin Harbour Castle 🇨🇦
🔗 breast-survivorship-conference.ca
#bcsm
Join the 300 attendees attending this Friday and Saturday 👇🏻
📆 November 28-29, 2025
📍The Westin Harbour Castle 🇨🇦
🔗 breast-survivorship-conference.ca
#bcsm
Really proud of all the research students who joined my lab @wchospital.bsky.social this summer and presented their work this week at university of Toronto IMS SURP Research day and @wchospital.bsky.social summer student research symposium day! all the best for the future!
August 15, 2025 at 1:31 AM
Really proud of all the research students who joined my lab @wchospital.bsky.social this summer and presented their work this week at university of Toronto IMS SURP Research day and @wchospital.bsky.social summer student research symposium day! all the best for the future!
Really nice to see #lobular #breastcancer get its own session at the recent Canadian Breast Cancer Symposium #CBCS25, with @lobularbca.bsky.social board members in attendance!
August 15, 2025 at 1:23 AM
Really nice to see #lobular #breastcancer get its own session at the recent Canadian Breast Cancer Symposium #CBCS25, with @lobularbca.bsky.social board members in attendance!
An honour to receive a @bcrfcure.bsky.social Career Development Award at the @conquercancer.bsky.social grants & awards ceremony at the annual @ascocancer.bsky.social meeting.
Grateful for funding to support my breast cancer research program at @wchospital.bsky.social and @uoftsurgery.bsky.social
Grateful for funding to support my breast cancer research program at @wchospital.bsky.social and @uoftsurgery.bsky.social
June 1, 2025 at 12:20 PM
An honour to receive a @bcrfcure.bsky.social Career Development Award at the @conquercancer.bsky.social grants & awards ceremony at the annual @ascocancer.bsky.social meeting.
Grateful for funding to support my breast cancer research program at @wchospital.bsky.social and @uoftsurgery.bsky.social
Grateful for funding to support my breast cancer research program at @wchospital.bsky.social and @uoftsurgery.bsky.social
Congratulations to our @uoftsurgery.bsky.social Breast surgical oncology fellow Dr. Richa Jaiswal on receiving a 2025 @conquercancer.bsky.social Merit Award for her abstract at the upcoming @ascocancer.bsky.social annual meeting! 👏🏻
#ASCO25
#ASCO25
Congratulations to the 2025 ASCO Annual Meeting Merit Award and Special Merit Award recipients. These awards will support 137 students and trainees who are first authors on abstracts selected for presentation at #ASCO25. View the full list of recipients: www.conquer.org/news/conquer...
April 22, 2025 at 1:32 AM
Congratulations to our @uoftsurgery.bsky.social Breast surgical oncology fellow Dr. Richa Jaiswal on receiving a 2025 @conquercancer.bsky.social Merit Award for her abstract at the upcoming @ascocancer.bsky.social annual meeting! 👏🏻
#ASCO25
#ASCO25
We are looking for a Permanent Full-Time Research Assistant II to join my growing research team at Women’s College Hospital !🇨🇦
If you have prior research experience and an interest in breast cancer research, women’s health and/or health equity, please apply! 👇🏻
jobs.dayforcehcm.com/en-US/wch/CA...
If you have prior research experience and an interest in breast cancer research, women’s health and/or health equity, please apply! 👇🏻
jobs.dayforcehcm.com/en-US/wch/CA...
Job Details | Dayforce Jobs
Find your next adventure
jobs.dayforcehcm.com
April 9, 2025 at 8:13 PM
We are looking for a Permanent Full-Time Research Assistant II to join my growing research team at Women’s College Hospital !🇨🇦
If you have prior research experience and an interest in breast cancer research, women’s health and/or health equity, please apply! 👇🏻
jobs.dayforcehcm.com/en-US/wch/CA...
If you have prior research experience and an interest in breast cancer research, women’s health and/or health equity, please apply! 👇🏻
jobs.dayforcehcm.com/en-US/wch/CA...
Enjoyed speaking on #lobular #breastcancer at the 2025 updates in #generalsurgery conference. @uoftsurgery.bsky.social
Looking forward to speaking about #TNBC at the lunchtime symposium .
Looking forward to speaking about #TNBC at the lunchtime symposium .
April 3, 2025 at 3:05 PM
Enjoyed speaking on #lobular #breastcancer at the 2025 updates in #generalsurgery conference. @uoftsurgery.bsky.social
Looking forward to speaking about #TNBC at the lunchtime symposium .
Looking forward to speaking about #TNBC at the lunchtime symposium .
A big welcome to Dr Sarah McLaughlin @mayocliniccancer.bsky.social speaking on management of the axilla after neoadjuvant therapy in #breastcancer at the update in #generalsurgery course #bcsm #ugs2025 @uoftsurgery.bsky.social
April 3, 2025 at 12:27 PM
A big welcome to Dr Sarah McLaughlin @mayocliniccancer.bsky.social speaking on management of the axilla after neoadjuvant therapy in #breastcancer at the update in #generalsurgery course #bcsm #ugs2025 @uoftsurgery.bsky.social
Dr Sean Cleary kicking off the 2025 update in #generalsurgery course, looking forward to a morning of #breast updates! #UGS2025 @uoftsurgery.bsky.social
April 3, 2025 at 12:13 PM
Dr Sean Cleary kicking off the 2025 update in #generalsurgery course, looking forward to a morning of #breast updates! #UGS2025 @uoftsurgery.bsky.social
Presented today at #SSO25
After 5 years in well-selected exceptional responders with triple negative and HER2+ breast cancers, there was no ipsilateral tumour recurrence! @socsurgonc.bsky.social
#SSO2025
jamanetwork.com/journals/jam...
After 5 years in well-selected exceptional responders with triple negative and HER2+ breast cancers, there was no ipsilateral tumour recurrence! @socsurgonc.bsky.social
#SSO2025
jamanetwork.com/journals/jam...
Selective Elimination of Breast Surgery for Invasive Breast Cancer
This nonrandomized trial examines 5-year efficacy outcomes evaluating radiotherapy alone without breast surgery in patients with breast cancer selected with image-guided vacuum assisted biopsy.
jamanetwork.com
March 28, 2025 at 12:16 PM
Presented today at #SSO25
After 5 years in well-selected exceptional responders with triple negative and HER2+ breast cancers, there was no ipsilateral tumour recurrence! @socsurgonc.bsky.social
#SSO2025
jamanetwork.com/journals/jam...
After 5 years in well-selected exceptional responders with triple negative and HER2+ breast cancers, there was no ipsilateral tumour recurrence! @socsurgonc.bsky.social
#SSO2025
jamanetwork.com/journals/jam...
Really enjoyed visiting @ubcmedicine.bsky.social and beautiful #Vancouver as a keynote speaker at their 2025 #breast symposium and speaking with colleagues and general surgery residents!
An amazing #breastcancer team at @providencehealthbc.bsky.social! Thanks for the invitation!
An amazing #breastcancer team at @providencehealthbc.bsky.social! Thanks for the invitation!
February 22, 2025 at 11:57 PM
Really enjoyed visiting @ubcmedicine.bsky.social and beautiful #Vancouver as a keynote speaker at their 2025 #breast symposium and speaking with colleagues and general surgery residents!
An amazing #breastcancer team at @providencehealthbc.bsky.social! Thanks for the invitation!
An amazing #breastcancer team at @providencehealthbc.bsky.social! Thanks for the invitation!
Thanks for the invitation @oncologyeducation.bsky.social! It was a pleasure debating Dr. Simmons and seeing everyone!
Another important debate is taking place: Should neoadjuvant chemotherapy be considered for all ER+/HER2- locally advanced breast cancers? @davidlimmd.bsky.social from Women's College Hospital and Dr. Christine Simmons from BC Cancer present their arguments. #BOSABCS25 #OncEd
February 7, 2025 at 8:58 PM
Thanks for the invitation @oncologyeducation.bsky.social! It was a pleasure debating Dr. Simmons and seeing everyone!
Reposted by David W. Lim MD PhD
What do we know about how the biology of mammary gland lactation and involution impact breast cancer risk?
Building on work from Dr. Pepper Schedin & many others, new work in #BreastCancerResearch from Ramaswamy Lab @osucccjames.bsky.social
link.springer.com/article/10.1...
Building on work from Dr. Pepper Schedin & many others, new work in #BreastCancerResearch from Ramaswamy Lab @osucccjames.bsky.social
link.springer.com/article/10.1...
Divergent paths of mammary gland involution: unveiling the cellular dynamics in abruptly and gradually involuted mouse models - Breast Cancer Research
Background Epidemiological studies associate an increase in breast cancer risk, particularly triple-negative breast cancer (TNBC), with lack of breastfeeding. This is more prevalent in African America...
link.springer.com
January 7, 2025 at 3:51 AM
What do we know about how the biology of mammary gland lactation and involution impact breast cancer risk?
Building on work from Dr. Pepper Schedin & many others, new work in #BreastCancerResearch from Ramaswamy Lab @osucccjames.bsky.social
link.springer.com/article/10.1...
Building on work from Dr. Pepper Schedin & many others, new work in #BreastCancerResearch from Ramaswamy Lab @osucccjames.bsky.social
link.springer.com/article/10.1...
Reposted by David W. Lim MD PhD
Dr. Singh draws nice comparisons between SOUND and INSEMA. #SABCS24 @oncoalert.bsky.social @sabcs.bsky.social
December 12, 2024 at 5:02 PM
Dr. Singh draws nice comparisons between SOUND and INSEMA. #SABCS24 @oncoalert.bsky.social @sabcs.bsky.social
Reposted by David W. Lim MD PhD
Micromets after neoadjuvant portend a worse prognosis and we need to develop a subtype-specific approach.
#SABCS24 @oncoalert.bsky.social
#SABCS24 @oncoalert.bsky.social
December 12, 2024 at 6:36 PM
Micromets after neoadjuvant portend a worse prognosis and we need to develop a subtype-specific approach.
#SABCS24 @oncoalert.bsky.social
#SABCS24 @oncoalert.bsky.social
Reposted by David W. Lim MD PhD
Reposted by David W. Lim MD PhD
Study in #JAMAOnc from Scotland/Wales of nearly 50k #breastcancer patients suggests vaginal estrogen use *NOT* associated w increase risk of breast cancer-specific mortality.
More reassuring data 👍
jamanetwork.com/journals/jam...
More reassuring data 👍
jamanetwork.com/journals/jam...
Vaginal Estrogen Therapy Use and Survival in Breast Cancer
This cohort study compares the mortality risk associated with vaginal estrogen therapy vs no hormone replacement therapy in 2 cohorts of patients with breast cancer in Scotland and Wales.
jamanetwork.com
November 23, 2024 at 2:28 PM
Study in #JAMAOnc from Scotland/Wales of nearly 50k #breastcancer patients suggests vaginal estrogen use *NOT* associated w increase risk of breast cancer-specific mortality.
More reassuring data 👍
jamanetwork.com/journals/jam...
More reassuring data 👍
jamanetwork.com/journals/jam...
Reposted by David W. Lim MD PhD
Recommend this excellent review from @BCJoyceO and co
“Current Clinical Utility of Circulating Tumor DNA Testing in Breast Cancer: A Practical Approach” #MedTwitter #bcsm ascopubs.org/doi/abs/10.1...
“Current Clinical Utility of Circulating Tumor DNA Testing in Breast Cancer: A Practical Approach” #MedTwitter #bcsm ascopubs.org/doi/abs/10.1...
Current Clinical Utility of Circulating Tumor DNA Testing in Breast Cancer: A Practical Approach | JCO Oncology Practice
Circulating tumor DNA (ctDNA) refers to DNA fragments released from cancer cells into
the bloodstream. Clinical utility of ctDNA in breast cancer has been explored in both
metastatic breast cancer (MB...
ascopubs.org
November 16, 2024 at 11:19 AM
Recommend this excellent review from @BCJoyceO and co
“Current Clinical Utility of Circulating Tumor DNA Testing in Breast Cancer: A Practical Approach” #MedTwitter #bcsm ascopubs.org/doi/abs/10.1...
“Current Clinical Utility of Circulating Tumor DNA Testing in Breast Cancer: A Practical Approach” #MedTwitter #bcsm ascopubs.org/doi/abs/10.1...
Reposted by David W. Lim MD PhD
🧵#Oncology #bcsm #MedSky
NEW Study of genetic testing in 729 ppl w/ any stg new #breastcancer:
👉7.3% had def/likely pathogenic mutation
👉5.3% were BRCA 1/2 or PALB2 (1/3 PARPi-eligible)
Highest odds: fam w/ ovarian ca (9.8x), age <40 (6.8x), TNBC (3.2x).
jamanetwork.com/journals/jam...
NEW Study of genetic testing in 729 ppl w/ any stg new #breastcancer:
👉7.3% had def/likely pathogenic mutation
👉5.3% were BRCA 1/2 or PALB2 (1/3 PARPi-eligible)
Highest odds: fam w/ ovarian ca (9.8x), age <40 (6.8x), TNBC (3.2x).
jamanetwork.com/journals/jam...
Universal Genetic Testing for Newly Diagnosed Invasive Breast Cancer
This cross-sectional study evaluates the prevalence and clinicopathological associations of germline pathogenic or likely pathogenic variants in 2 groups of breast cancer susceptibility genes among a ...
jamanetwork.com
November 12, 2024 at 12:43 PM
🧵#Oncology #bcsm #MedSky
NEW Study of genetic testing in 729 ppl w/ any stg new #breastcancer:
👉7.3% had def/likely pathogenic mutation
👉5.3% were BRCA 1/2 or PALB2 (1/3 PARPi-eligible)
Highest odds: fam w/ ovarian ca (9.8x), age <40 (6.8x), TNBC (3.2x).
jamanetwork.com/journals/jam...
NEW Study of genetic testing in 729 ppl w/ any stg new #breastcancer:
👉7.3% had def/likely pathogenic mutation
👉5.3% were BRCA 1/2 or PALB2 (1/3 PARPi-eligible)
Highest odds: fam w/ ovarian ca (9.8x), age <40 (6.8x), TNBC (3.2x).
jamanetwork.com/journals/jam...