About

Dennis B Liu is an Associate Professor in the Department of Urology at Northwestern University Feinberg School of Medicine, specializing in Pediatric Urology. He is affiliated with the Center for Reproductive Science and the Northwestern University Clinical and Translational Sciences Institute (NUCATS). His professional focus includes pediatric urological conditions, reproductive health, and related research areas. Further details about his specific research contributions or background are not provided on the page.

Research topics

• Andrology
• Internal medicine
• Medicine
• Endocrinology
• Gynecology
• Obstetrics
• Computer Science
• Genetics
• Biology
• Physiology
• Pathology
• Chemistry
• Database
• Oncology

Selected publications

• IP70-05 CLINICIAN PERSPECTIVES ON FORESKIN AND POST-CIRCUMCISION CONCERNS AFTER DISSEMINATION OF A PCP CARE PATHWAY

  The Journal of Urology · 2026-04-27

  article
  PublisherDOI

• IP20-38 CYSTOSTOMY BUTTON: A REPURPOSED GASTROSTOMY TUBE OFFERS A SAFE, CONTINENT ALTERNATIVE FOR SELECTED CHILDREN WITH POOR BLADDER EMPTYING

  The Journal of Urology · 2025-04-08

  article
  PublisherDOI

• Phimosis Treatment and Risk of Recurrent Urinary Tract Infection in Infant Males: A Systematic Review

  Urology · 2025-11-21

  article
  PublisherDOI

• Data from Breast Hormone Concentrations in Random Fine-Needle Aspirates of Healthy Women Associate with Cytological Atypia and Gene Methylation

  2023

  • Endocrinology
  • Internal medicine
  • Andrology

  <div>Abstract<p>Sex steroid hormones contribute to breast cancer development, but data on concentrations of these within breast tissue are limited. We performed simultaneous multiparameter measurement of breast sex steroids, breast epithelial cytology, and DNA methylation in 119 healthy women (54 pre- and 65 postmenopausal) without a history of breast cancer. Random fine-needle aspiration (rFNA) of the breast was performed simultaneously with blood collection. Breast samples were analyzed by LC/MS-MS for estrone, estradiol, progesterone, androstenedione, and testosterone. Blood samples were assayed for estradiol and progesterone by immunoassay. Cytomorphology was classified using the Masood Score, and DNA methylation of eight genes was analyzed using quantitative multiplexed methylation-specific PCR, and expressed as the cumulative methylation index (CMI). Serum and breast concentrations of estradiol and progesterone showed significant correlation (Spearman <i>r</i> = 0.34, <i>P</i><sub>adj</sub> = 0.001 and <i>r</i> = 0.69, <i>P</i><sub>adj</sub> < 0.0006, respectively). Progesterone concentration was significantly higher in the premenopausal breast (<i>P</i><sub>adj</sub> < 0.0008), and showed a luteal surge. Breast estrone and estradiol concentrations did not differ significantly by menopause, but androstenedione concentration was higher in the breasts of postmenopausal women (<i>P</i> = 0.026 and <i>P</i><sub>adj</sub> = 0.208). Breast androgens were significantly correlated with breast density (Spearman <i>r</i> = 0.27, <i>P</i><sub>adj</sub> = 0.02 for testosterone) and CMI (Spearman <i>r</i> = 0.3, <i>P</i><sub>adj</sub> = 0.038 for androstenedione). Our data indicate that future larger studies of breast steroid hormones along with other parameters are feasible. Significant associations of breast androgen concentrations with breast density and gene methylation warrant future study. <i>Cancer Prev Res; 11(9); 557–68. ©2018 AACR</i>.</p></div>

  DOI

• Response to commentary re retrograde incision from orifice (RIO) technique for endoscopic incision of ureterocele: 15 years of outcomes

  Journal of Pediatric Urology · 2023-06-24 · 1 citations

  letter
  PublisherDOI

• Supplemental Tables 1-3 from Breast Hormone Concentrations in Random Fine-Needle Aspirates of Healthy Women Associate with Cytological Atypia and Gene Methylation

  2023

  • Andrology
  • Gynecology
  • Physiology

  <p>Table S1. Correlations between parameters that influence the quality of the rFNA sample (119 women) Table S2. Correlation between Breast and serum hormone concentrations. Table S3. Cytology according to menopausal status and menstrual cycle.</p>

  DOI

• Supplemental Tables 1-3 from Breast Hormone Concentrations in Random Fine-Needle Aspirates of Healthy Women Associate with Cytological Atypia and Gene Methylation

  2023

  • Computer Science
  • Gynecology
  • Andrology

  <p>Table S1. Correlations between parameters that influence the quality of the rFNA sample (119 women) Table S2. Correlation between Breast and serum hormone concentrations. Table S3. Cytology according to menopausal status and menstrual cycle.</p>

  DOI

• Growth in Newborn Circumcisions Performed by Pediatric Urologists and Advanced Practice Providers Between 2010 and 2021 in the United States

  Urology · 2023-11-17 · 5 citations

  article
  PublisherDOI

• Streamlining surgical trays for common pediatric urology Procedures: A quality improvement initiative

  Journal of Pediatric Urology · 2022 · 10 citations

  Corresponding
  • Medicine
  • Surgery
  • Medical physics
  PublisherDOI

• Retrograde incision from orifice (RIO) technique for endoscopic incision of ureterocele: 15 years of outcomes

  Journal of Pediatric Urology · 2022-10-10 · 2 citations

  articleCorresponding
  PublisherDOI

Frequent coauthors

• Alfred Rademaker

  University of Chicago

  119 shared

• Charles L. Bennett

  54 shared

• Terry C. Davis

  52 shared

• Michael S. Wolf

  Northwestern University

  45 shared

• Paul R. Haut

  Indianapolis Zoo

  40 shared

• Susan L. Cohn

  40 shared

• Howard M. Katzenstein

  Ono Pharmaceutical (United States)

  40 shared

• Jennifer Schmoldt

  Northwestern University

  40 shared

Education

• M.D.

  Northwestern University Feinberg School of Medicine

• B.S.

  University of California, San Diego