# Marc Daniel Ryser

- Assistant Professor in Population Health Sciences
- Instructor in the Department of Mathematics (Joint)
- Assistant Professor of Mathematics (Joint)
- Member of the Duke Cancer Institute

**External address:**299B Physics Bldg, 120 Science Drive, Durham, NC 27708

**Internal office address:**Box 90320, Durham, NC 27708

**Phone:**(919) 684-8294

### Research Areas and Keywords

##### Biological Modeling

##### Computational Mathematics

##### PDE & Dynamical Systems

##### Probability

For an up-to-date description of my research program please visit

Areas of Expertise: Multi-scale modeling, early carcinogenesis, cancer evolution

### Selected Grants

The Mathematics of Breast Cancer Overtreatment: Improving Treatment Choice through Effective Communication of Personalized Cancer Risk awarded by National Institutes of Health (Principal Investigator). 2018 to 2021

Molecular and Radiologic Predictors of Invasion in a DCIS Active Surveillance Cohort awarded by Breast Cancer Research Foundation (Co Investigator). 2018 to 2019

Mathematical Analysis of Spatial Cancer Models awarded by National Science Foundation (Co-Principal Investigator). 2016 to 2019

The Mathematics of Breast Cancer Overtreatment: Improving Treatment Choice through Effective Communication of Personalized Cancer Risk awarded by National Institutes of Health (Principal Investigator). 2016 to 2018

Shen, Y, Dong, W, Gulati, R, Ryser, MD, and Etzioni, R. "Estimating the frequency of indolent breast cancer in screening trials." *Statistical Methods in Medical Research* 28.4 (April 2019): 1261-1271.
Full Text

Ryser, MD, Weaver, DL, Zhao, F, Worni, M, Grimm, LJ, Gulati, R, Etzioni, R, Hyslop, T, Lee, SJ, and Hwang, ES. "Cancer Outcomes in DCIS Patients Without Locoregional Treatment." *Journal of the National Cancer Institute* (February 13, 2019).
Full Text

Ryser, MD, Gulati, R, Eisenberg, MC, Shen, Y, Hwang, ES, and Etzioni, RB. "Identification of the Fraction of Indolent Tumors and Associated Overdiagnosis in Breast Cancer Screening Trials." *American Journal of Epidemiology* 188.1 (January 2019): 197-205.
Full Text

Ryser, MD, Yu, M, Grady, W, Siegmund, K, and Shibata, D. "Epigenetic Heterogeneity in Human Colorectal Tumors Reveals Preferential Conservation And Evidence of Immune Surveillance." *Scientific Reports* 8.1 (November 23, 2018): 17292-null.
Full Text

Ryser, MD, Min, B-H, Siegmund, KD, and Shibata, D. "Spatial mutation patterns as markers of early colorectal tumor cell mobility." *Proceedings of the National Academy of Sciences of the United States of America* 115.22 (May 14, 2018): 5774-5779.
Full Text

"Role of Preoperative Variables in Reducing the Rate of Occult Invasive Disease for Women Considering Active Surveillance for Ductal Carcinoma In Situ." *JAMA surgery* 153.3 (March 2018): 290-291.
Full Text

Ryser, MD, Horton, JK, and Hwang, ES. "How Low Can We Go-and Should We? Risk Reduction for Minimal-Volume DCIS." *Annals of Surgical Oncology* 25.2 (February 2018): 354-355.
Full Text

Grimm, LJ, Ryser, MD, Partridge, AH, Thompson, AM, Thomas, JS, Wesseling, J, and Hwang, ES. "Surgical Upstaging Rates for Vacuum Assisted Biopsy Proven DCIS: Implications for Active Surveillance Trials." *Annals of Surgical Oncology* 24.12 (November 2017): 3534-3540.
Full Text

Cao, Y, Feng, Y, Ryser, MD, Zhu, K, Herschlag, G, Cao, C, Marusak, K, Zauscher, S, and You, L. "Programmable assembly of pressure sensors using pattern-forming bacteria." *Nature Biotechnology* 35.11 (November 2017): 1087-1093.
Full Text

Ryser, MD, Rositch, A, and Gravitt, PE. "Modeling of US Human Papillomavirus (HPV) Seroprevalence by Age and Sexual Behavior Indicates an Increasing Trend of HPV Infection Following the Sexual Revolution." *The Journal of Infectious Diseases* 216.5 (September 2017): 604-611.
Full Text

## Pages

Shira at the Algebraic CombinatoriXX II workshop at BIRS last summer Shira Viel I received my PhD from North Carolina State University under the direction of Nathan Reading. My thesis work was in algebraic and geometric combinatorics with a focus... read more »

In cancer treatment, metastatic tumors receive equal treatment. Patients are given the same aggressive therapies when abnormal clusters of cells are discovered early, even if they may be harmless. In research studies co-led by Duke's Marc Ryser... read more »

Kevin Murgas (Biomedical Engineering, Class 2017), started working on this project during a Research Experience for Undergraduates (REU) program in mathematical biology in the summer of 2015. Together with his research mentor, Dr. Marc Ryser, they... read more »

A mathematical model from Duke University mathematicians suggests more can be done to protect people from the human papilloma virus. HPV is associated with cervical cancer in women, but can also cause various cancers in men. Duke mathematician... read more »

Active surveillance could be a viable alternative to surgery and radiation for select patients with ductal carcinoma in situ, or DCIS, according to a mathematical model developed by researchers at Duke University.... read more »