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King Salman Armed Forces Hospital.
Dr. Adher D. Al-Sayed is a Saudi-based Consultant Medical Oncologist specializing in breast cancer, with a longstanding clinical and research career at King Faisal Specialist Hospital & Research Centre (KFSHRC), Riyadh. His work has particularly focused on breast cancer treatment, neoadjuvant chemotherapy, HER2-positive disease, triple-negative breast cancer, metaplastic breast carcinoma, and emerging systemic and immunotherapy approaches.
Dr. Al-Sayed's clinical and academic interests include:
His published work demonstrates particular involvement in locally advanced and metastatic breast cancer, including treatment response following neoadjuvant chemotherapy and novel chemo-immunotherapy approaches.
Dr. Al-Sayed has spent many years at KFSHRC's oncology program. His research profile identifies him as a Consultant at KFSHRC's Oncology Center in Riyadh, with his KFSHRC affiliation extending back to at least the early 2000s. His profile also describes involvement in the Medical Oncology Fellowship Program.
His academic career has been closely linked with the development of breast-cancer research at KFSHRC. He has collaborated with specialists in medical oncology, surgical oncology, radiation oncology, pathology and cancer research.
Dr. Al-Sayed has 59 listed publications on his research profile and approximately 740 citations, although these numbers are dynamic.
Some notable areas of his research include:
1. Metaplastic breast carcinoma
He was a co-author and corresponding author of research examining the clinical presentation, treatment outcomes and prognostic factors of metaplastic breast carcinoma in patients treated at KFSHRC. The study reviewed cases treated between 1994 and 2004 and contributed to understanding this uncommon and aggressive breast-cancer subtype.
2. Metastatic metaplastic breast cancer and immunotherapy
In 2019, he was the corresponding author of a case report describing a complete response of chemotherapy-refractory metastatic metaplastic breast cancer to a paclitaxel-immunotherapy combination. The work was conducted through the Department of Medical Oncology at KFSHRC.
3. Neoadjuvant treatment of locally advanced breast cancer
He contributed to research evaluating pathological complete response following neoadjuvant chemotherapy with or without trastuzumab in locally advanced breast cancer. The study involved multidisciplinary investigators from medical, surgical and radiation oncology at KFSHRC.
4. Breast cancer biology and tumor microenvironment
He has also contributed to research examining biological mechanisms involved in breast cancer, including studies of adipocytes, inflammatory pathways and tumor-promoting mechanisms.
5. Contemporary Saudi breast-cancer management
More recently, Dr. Al-Sayed has participated in Saudi multidisciplinary work on consensus recommendations for the management of early and metastatic breast cancer, alongside oncologists from major Saudi cancer centers.
Dr. Al-Sayed is an invited speaker at the 2026 Saudi Society of Breast & Endocrine Surgery (SSBES) Annual Conference, scheduled for 10–12 December 2026 at Le Méridien Medina, Medina, Saudi Arabia.
His scheduled presentations include:
His involvement is particularly relevant to the conference's multidisciplinary breast-cancer program because his specialty in medical oncology complements the surgical and radiation oncology perspectives represented in the scientific program.
Publicly available sources confirm that Dr. Al-Sayed holds an MD and is a Consultant Medical Oncologist. However, I could not find a sufficiently authoritative public source confirming the exact medical school, residency institution, fellowship dates, or board-certification chronology, so I would not recommend adding specific institutions or dates to a website biography without further verification.
A third-party professional profile describes his training as including an internal-medicine residency, medical-oncology fellowship and breast-cancer subspecialty training, but these details are not independently confirmed by KFSHRC or another primary institutional source
Saudi Society of Breast & Endocrine Surgery (SSBES)
Saudi Society of Breast & Endocrine Surgery (SSBES)