Jonathon Mahlow
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Jonathon Mahlow, MD

Languages spoken: English

Dr. Mahlow is a staff pathologist at ARUP and an assistant professor of pathology at the University of Utah School of Medicine. He received his MD from Wayne State School of Medicine in Detroit MI and completed his anatomic and clinical pathology residency training at the Cleveland Clinic Foundation in Cleveland OH. Subsequently, he completed a fellowship in surgical pathology at the University of Utah. Dr. Mahlow is a member of several professional societies, including the United States and Canadian Academy of Pathology, and the American Society for Clinical Pathology.

Dr. Mahlow’s subspecialty areas of expertise and research interests include genitourinary pathology, breast pathology, and cardiac pathology.

Specialties

  • Urologic Pathology
  • Surgical Pathology
  • Cardiac Pathology
  • Pathology, Anatomical
  • Breast Pathology

Board Certification

American Board of Pathology (Anatomic & Clinical)

Dr. Mahlow is a staff pathologist at ARUP and an assistant professor of pathology at the University of Utah School of Medicine. He received his MD from Wayne State School of Medicine in Detroit MI and completed his anatomic and clinical pathology residency training at the Cleveland Clinic Foundation in Cleveland OH. Subsequently, he completed a fellowship in surgical pathology at the University of Utah. Dr. Mahlow is a member of several professional societies, including the United States and Canadian Academy of Pathology, and the American Society for Clinical Pathology.

Dr. Mahlow’s subspecialty areas of expertise and research interests include genitourinary pathology, breast pathology, and cardiac pathology.

Board Certification and Academic Information

Academic Departments Pathology -Associate Professor (Clinical)
Board Certification
American Board of Pathology (Anatomic & Clinical)

Education history

Undergraduate Biochemistry - University of Michigan B.S.
Undergraduate Chemistry - University of Michigan B.S.Chem
Research Fellow Chemistry - University of Michigan Research Fellow
Professional Medical Medicine - Wayne State University School of Medicine M.D.
Residency Anatomic and Clinical Pathology - Pathology and Laboratory Medicine Institute, Cleveland Clinic Resident
Fellowship General Surgical Pathology - University of Utah School of Medicine Fellow

Selected Publications

Journal Article

  1. Fenlon J, Van Bibber N, Mahlow J, Yamoah K, Soupir AC, Nguyen JV, Moran Segura C, Spivak AM, Knudsen BS, Zhou Q, Hu-Lieskovan S, Puri S, Zhang W, DeRose YS, Suneja G, Coghill A (2025). Human Immunodeficiency Virus-Associated Differences in the Tumor Immune Microenvironment of Lung, Breast, and Prostate Cancers. Cancer epidemiology, biomarkers & prevention, 34(6), 860-867.
  2. Wilcock D, Sirohi D, Coleman JF, Adelhardt P, Kim JT, Albertson D, Affolter K, Beech C, Jedrzkiewicz J, Ruano AL, Cleary AS, Mahlow J, Balatico M, Gulbahce H (2025). HER2 fluorescence in situ hybridization groups 2-4 breast cancers classified as positive after targeted recounts following equivocal (2+) immunohistochemistry. American journal of clinical pathology, 163(6), 837-846.
  3. Beech C, Wilcock DM, Moore KH, Rowe L, Mahlow J, Jedrzkiewicz J, Cleary AS, Lomo L, Ruano AL, Gering M, Bradshaw D, Maughan M, Tran P, Davis R, Affolter K, Albertson DJ, Adelhardt P, Kim J, Coleman JF, Deftereos G, Gulbahce EH, Sirohi (2025). Changes in HER2 Amplification Status for Breast Cancer Patients After Immunohistochemistry Directed In Situ Hybridization. Applied immunohistochemistry & molecular morphology, 33(2), 91-102.
  4. Brownson KE, Flores-Huidobro Martinez A, Ganbayar J, Sorensen LM, Darelli-Anderson AM, Prathibha S, Hoven N, Nansalmaa E, Mahlow J, Pushkin B, Potter D, Tuttle T, Price R (2024). Development of an International Virtual Multidisciplinary Tumor Board for Breast Cancer in Mongolia. The Journal of surgical research, 295, 776-782.
  5. Mahlow J, Barry M, Albertson DJ, Jo YJ, Balatico M, Seasor T, Gebrael G, Kumar SA, Sayegh N, Tripathi N, Agarwal N, Swami U, Sirohi (2024). Histologic patterns in prostatic adenocarcinoma are not predictive of mutations in the homologous recombination repair pathway. Human pathology, 144, 28-33.
  6. Sangoi AR, Tsai H, Harik L, Mahlow J, Tretiakova M, Williamson SR, Hirsch M (2024). Vascular, adipose tissue, and/or calyceal invasion in clear cell tubulopapillary renal cell tumour: potentially problematic diagnostic scenarios. Histopathology,
  7. Albertson D, Barry M, Liu T, Mahlow J, Sirohi (2024). Genotype Phenotype Correlation of Renal Tumors in the Cancer Genome Atlas Database. International journal of surgical pathology, 33(2), 10668969241260236.
  8. Luo MX, Lyle A, Bennett P, Albertson D, Sirohi D, Maughan BL, McMurtry V, Mahlow (2024). Artificial intelligence chatbot vs pathology faculty and residents: Real-world clinical questions from a genitourinary treatment planning conference. American journal of clinical pathology, 162(6), 541-3.
  9. Sayegh N, Jo Y, Gebrael G, Tripathi N, Chigarira B, Srivastava A, Nordblad B, Dal E, Hage Chehade C, Mahlow J, Maughan BL, Gupta S, Agarwal N, Swami (2024). Real-world Effectiveness of Single-Agent Enfortumab Vedotin in Patients With Advanced Urothelial Carcinoma. Clinical genitourinary cancer, 23(1), 102287.
  10. Wilcock DM, Moore KH, Rowe L, Mahlow J, Jedrzkiewicz J, Cleary AS, Lomo L, Ruano AL, Gering M, Bradshaw D, Maughan M, Tran P, Burlingame J, Davis R, Affolter K, Albertson DJ, Adelhardt P, Kim JT, Coleman JF, Deftereos G, Gulbahce EH, Sirohi (2023). Quantitative Imaging Analysis Fluorescence In Situ Hybridization Validation for Clinical HER2 Testing in Breast Cancer. Archives of pathology & laboratory medicine,
  11. Wilcock D, Sirohi D, Albertson D, Cleary AS, Coleman JF, Jedrzkiewicz J, Mahlow J, Ruano AL, Gulbahce H (2023). Clinicopathologic Features of Breast Carcinoma With 2018 American Society of Clinical Oncology/College of American Pathologists Fluorescence In Situ Hybridization Group 3 (Human Epidermal Growth Factor Receptor 2 Chromosome 17 Centromere Ratio <2.0 and Average Human Epidermal Growth Factor Receptor 2 Copy Number ¿6.0) Breast Cancers. Archives of pathology & laboratory medicine, 148(8), 890-897.
  12. Repetto F, Sirohi D, Greipp P, Mahlow (2023). Incidental Detection of TFEB-Amplified Renal Cell Carcinoma by Colocated Gene Amplification of CCND3 (6p21): A Case Report and Review of the Literature. International journal of surgical pathology, 10668969231185081.
  13. Tausinga T. Snyder L. Mahlow J. Agarwal C. Hotaling J. McCormick B (2023). Incidental discovery of seminoma after simple orchiectomy in transgender individuals: A case series. Journal of urology and research, 8(2), 22-29.
  14. Sirohi D, Chipman J, Barry M, Albertson D, Mahlow J, Liu T, Raps E, Haaland B, Sayegh N, Li H, Rathi N, Sharma P, Agarwal N, Knudsen (2022). Histologic Growth Patterns in Clear Cell Renal Cell Carcinoma Stratify Patients into Survival Risk Groups. Clinical genitourinary cancer, 20(3), e233-e243.
  15. Jeffrey Vehawn, Jonathon Mahlow, Jayant Agarwal, Christopher Dechet, Alejandro Sanche (2022). Case of testicular nonseminomatous germ cell tumor cancer soft tissue seeding after inguinal orchiectomy. Urology case reports,
  16. McMurtry V, Mahlow J, Coleman JF, Deftereos G, Jattani R, Bastien RRL, Durtschi J, Jarboe E, Lomo L, Sirohi (2022). Morphologic Characteristics and Mutational Analysis of Fumarate Hydratase Deficient Kidney and Smooth Muscle Tumors. American journal of clinical pathology, 159(2), 164-171.
  17. Vehawn J, Choudry M, Mahlow J, Agarwal J, Dechet C, Sanchez (2022). Case of testicular nonseminomatous germ cell tumor cancer soft tissue seeding after inguinal orchiectomy. Urology case reports, 43, 102120.
  18. Kukull B, Mahlow J, Hale G, Perry L (2021). Whipple's disease: a fatal mimic. Autopsy & case reports, 11, e2020237.
  19. Mahlow J, Goold EA, Jedrzkiewicz J, Gulbahce HE (2020). What to Expect From the New ASCO/CAP Guideline Recommendations for Hormone Receptor Testing in Breast Cancer: A National Reference Laboratory Experience. Appl Immunohistochem Mol Morphol, 29, 245-250.
  20. Mahlow J, Bunch DR, Wang (2016). Quantification of 1,25-Dihydroxyvitamin D2 and D3 in Serum Using Liquid Chromatography-Tandem Mass Spectrometry. Methods in molecular biology (Clifton, N.J.), 1378, 291-300.

Review

  1. Mahlow J, Gupta (2024). Pathology Focused Review of Morphologic Subtypes and Molecular Variants of Urothelial Carcinoma With an Emphasis on Clinical/Treatment Relevance. Urologic oncology,

Case Report

  1. Mahlow J, Sanchez A, Barry M, Sirohi (2022). Composite pheochromocytoma/paraganglioma-ganglioneuroma with a germline SDHC mutation: a first of its kind case report. Histopathology, 81(5), 682-685.