Julian Chavarriaga
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Julian Chavarriaga has a total of 270 co-authors. Here are the top co-authors by number of shared publications:
Robert J. Hamilton
Division of Urology, Department of Surgery, Princess Margaret Cancer Centre, University of Toronto, Toronto, Ontario, Canada
8 shared publicationsDaniel Suso-Palau
UROUEB - Urology Research Group, El Bosque University, Bogotá, Colombia
7 shared publicationsDavid Álvarez Villaraga
5 shared publicationsLynn Anson-Cartwright
Division of Urology, Department of Surgical Oncology, Princess Margaret Cancer Centre, University Health Network and the University of Toronto, Toronto, Canada
5 shared publicationsDiego Camacho
Department of Urologic Oncology, Instituto Nacional de Cancerologia, Bogotá, Colombia
4 shared publicationsEshetu G. Atenafu
Department of Biostatistics, University Health Network, and Division of Biostatistics, University of Toronto, Toronto, Canada
4 shared publications
Latest Publications
- 28 August 2026
- Published by Springer Nature in World Journal of Urology
- Vol. 44 (1) , 612
Robotic versus open post-chemotherapy retroperitoneal lymph node dissection: a propensity score matched study across 11 academic medical centers
- 28 August 2026
- Published by Springer Nature in World Journal of Urology
- Vol. 44 (1) , 612
Robotic versus open post-chemotherapy retroperitoneal lymph node dissection: a propensity score matched study across 11 academic medical centers
- 1 March 2026
- Published by Wolters Kluwer Health in Journal of Urology
- Vol. 215 (3) , 326-336
Primary Retroperitoneal Lymph Node Dissection in Marker-Positive Clinical Stage II Nonseminomatous Germ Cell Tumors
Guidelines usually recommend chemotherapy rather than primary retroperitoneal lymph node dissection (pRPLND) for clinical stage II non-seminomatous germ cell tumours (NSGCTs) with elevated serum tumour markers (STMs). This study evaluated oncologic and perioperative outcomes of pRPLND in patients with marker-positive versus marker-negative CSII NSGCT. A retrospective review from our prospectively maintained database identified patients undergoing pRPLND (1983-2022). The primary endpoint was relapse-free survival (RFS). Secondary endpoints included cancer-specific survival (CSS), relapse location, and perioperative outcomes. Outcomes were compared using Kaplan-Meier analysis, log-rank testing, and multivariable COX regression. Among 207 patients with, 65 (31%) had elevated STMs (AFP: 12-376 µg/L; bHCG: 3-354 IU/L). Marker elevation was associated with higher relapse risk, with 5-year RFS of 75% vs. 93% for marker-negative patients (p<0.001). Five-year CSS was 96% vs. 100%, respectively (p=0.009). Of four cancer-specific deaths, two involved somatic transformation, one patient declined chemotherapy at relapse, and one death occurred during chemotherapy. Elevated AFP correlated with worse CSS, and dual marker elevation predicted greater relapse risk. Surgical complications rates did not differ between groups. Although elevated STMs are associated with increased relapse and mortality risk, pRPLND is associated with long-term disease control in approximately 75% of patients. Most relapses can be successfully treated in compliant individuals. Multidisciplinary decision-making should weigh relapse risk and potential salvage chemotherapy needs against the long-term morbidity of primary chemotherapy.
- 1 March 2026
- Published by Wolters Kluwer Health in Journal of Urology
- Vol. 215 (3) , 326-336
Primary Retroperitoneal Lymph Node Dissection in Marker-Positive Clinical Stage II Nonseminomatous Germ Cell Tumors
Guidelines usually recommend chemotherapy rather than primary retroperitoneal lymph node dissection (pRPLND) for clinical stage II non-seminomatous germ cell tumours (NSGCTs) with elevated serum tumour markers (STMs). This study evaluated oncologic and perioperative outcomes of pRPLND in patients with marker-positive versus marker-negative CSII NSGCT. A retrospective review from our prospectively maintained database identified patients undergoing pRPLND (1983-2022). The primary endpoint was relapse-free survival (RFS). Secondary endpoints included cancer-specific survival (CSS), relapse location, and perioperative outcomes. Outcomes were compared using Kaplan-Meier analysis, log-rank testing, and multivariable COX regression. Among 207 patients with, 65 (31%) had elevated STMs (AFP: 12-376 µg/L; bHCG: 3-354 IU/L). Marker elevation was associated with higher relapse risk, with 5-year RFS of 75% vs. 93% for marker-negative patients (p<0.001). Five-year CSS was 96% vs. 100%, respectively (p=0.009). Of four cancer-specific deaths, two involved somatic transformation, one patient declined chemotherapy at relapse, and one death occurred during chemotherapy. Elevated AFP correlated with worse CSS, and dual marker elevation predicted greater relapse risk. Surgical complications rates did not differ between groups. Although elevated STMs are associated with increased relapse and mortality risk, pRPLND is associated with long-term disease control in approximately 75% of patients. Most relapses can be successfully treated in compliant individuals. Multidisciplinary decision-making should weigh relapse risk and potential salvage chemotherapy needs against the long-term morbidity of primary chemotherapy.
- Open Access
- 17 February 2026
- Published by Asociacion Colombiana de Hematologia y Oncologia in Revista Colombiana de Hematología y Oncología
- Vol. 13 (1-Supl) , 330-352
Biología molecular del cáncer de próstata
Introducción: el cáncer de próstata (CaP) es la neoplasia maligna más frecuente en hombres y una causa relevante de mortalidad oncológica mundial. Su heterogeneidad, desde tumores indolentes hasta formas agresivas, dificulta la estratificación del riesgo y la selección terapéutica, pero los avances en biología molecular han aclarado las alteraciones genómicas y epigenéticas implicadas en la tumorogénesis, progresión y resistencia, impulsando la medicina de precisión. Métodos: se realizó una revisión narrativa de la literatura sobre vías moleculares clave, alteraciones genómicas clínicamente relevantes y estrategias terapéuticas emergentes basadas en biomarcadores en CaP localizado y metastásico. Resultados: las mutaciones germinales y somáticas en genes de reparación del ADN, como BRCA1, BRCA2 y ATM, se relacionan con mayor susceptibilidad, fenotipos agresivos y sensibilidad a inhibidores PARP y esquemas con platino. La pérdida de genes supresores tumorales (PTEN, TP53, RB1) favorece la inestabilidad genómica, la resistencia a la castración y un pronóstico desfavorable. Los clasificadores genómicos (Oncotype DX, Decipher) refinan la estratificación del riesgo y orientan la intensificación o desescalamiento terapéutico en enfermedad localizada, mientras que el testeo genético reflejo y los estudios clínicos dirigidos por biomarcadores ejemplifican la integración clínica de la información molecular. En enfermedad avanzada, terapias dirigidas al receptor androgénico, a la reparación del ADN y al PSMA están transformando el manejo del CaP. Conclusiones: la caracterización molecular del CaP permite intervenciones guiadas por biomarcadores que optimizan las decisiones terapéuticas y los desenlaces clínicos. La incorporación sistemática del perfil genómico será esencial para consolidar la medicina de precisión en el tratamiento.
- 17 February 2026
- Published by Asociacion Colombiana de Hematologia y Oncologia in Revista Colombiana de Hematología y Oncología
- Vol. 13 (1-Supl) , 330-352
Open AccessBiología molecular del cáncer de próstata
Introducción: el cáncer de próstata (CaP) es la neoplasia maligna más frecuente en hombres y una causa relevante de mortalidad oncológica mundial. Su heterogeneidad, desde tumores indolentes hasta formas agresivas, dificulta la estratificación del riesgo y la selección terapéutica, pero los avances en biología molecular han aclarado las alteraciones genómicas y epigenéticas implicadas en la tumorogénesis, progresión y resistencia, impulsando la medicina de precisión. Métodos: se realizó una revisión narrativa de la literatura sobre vías moleculares clave, alteraciones genómicas clínicamente relevantes y estrategias terapéuticas emergentes basadas en biomarcadores en CaP localizado y metastásico. Resultados: las mutaciones germinales y somáticas en genes de reparación del ADN, como BRCA1, BRCA2 y ATM, se relacionan con mayor susceptibilidad, fenotipos agresivos y sensibilidad a inhibidores PARP y esquemas con platino. La pérdida de genes supresores tumorales (PTEN, TP53, RB1) favorece la inestabilidad genómica, la resistencia a la castración y un pronóstico desfavorable. Los clasificadores genómicos (Oncotype DX, Decipher) refinan la estratificación del riesgo y orientan la intensificación o desescalamiento terapéutico en enfermedad localizada, mientras que el testeo genético reflejo y los estudios clínicos dirigidos por biomarcadores ejemplifican la integración clínica de la información molecular. En enfermedad avanzada, terapias dirigidas al receptor androgénico, a la reparación del ADN y al PSMA están transformando el manejo del CaP. Conclusiones: la caracterización molecular del CaP permite intervenciones guiadas por biomarcadores que optimizan las decisiones terapéuticas y los desenlaces clínicos. La incorporación sistemática del perfil genómico será esencial para consolidar la medicina de precisión en el tratamiento.
- 25 September 2025
- Published by Elsevier in European Urology Oncology
- Vol. 8 (6) , 1575-1582
MicroRNA as a Liquid Biomarker to Detect Malignancy in Small Testicular Masses
- 25 September 2025
- Published by Elsevier in European Urology Oncology
- Vol. 8 (6) , 1575-1582
MicroRNA as a Liquid Biomarker to Detect Malignancy in Small Testicular Masses
- Top Cited Papers
- 29 May 2025
- Published by Elsevier in The Lancet
- Vol. 406 (10498) , 76-90
Testicular cancer
- 29 May 2025
- Published by Elsevier in The Lancet
- Vol. 406 (10498) , 76-90
Top Cited PapersTesticular cancer
- 30 October 2024
- Published by Elsevier in Urologic Oncology: Seminars and Original Investigations
- Vol. 43 (3) , 193.e7-193.e17
Statin use and oncological outcomes in a propensity-matched cohort of nonmetastatic castration resistant prostate cancer patients of the ARAMIS trial
- 30 October 2024
- Published by Elsevier in Urologic Oncology: Seminars and Original Investigations
- Vol. 43 (3) , 193.e7-193.e17
Statin use and oncological outcomes in a propensity-matched cohort of nonmetastatic castration resistant prostate cancer patients of the ARAMIS trial
- Open Access
- 24 October 2024
- Published by Elsevier in European Urology Focus
- Vol. 11 (2) , 258-265
Long-term Relapse and Survival in Clinical Stage I Testicular Teratoma
- 24 October 2024
- Published by Elsevier in European Urology Focus
- Vol. 11 (2) , 258-265
Open AccessLong-term Relapse and Survival in Clinical Stage I Testicular Teratoma
- 27 August 2024
- Published by Elsevier in Urologic Oncology: Seminars and Original Investigations
- Vol. 42 (12) , 455.e1-455.e8
Lymph node density as a prognostic marker of relapse in patients who underwent primary retroperitoneal lymph node dissection
- 27 August 2024
- Published by Elsevier in Urologic Oncology: Seminars and Original Investigations
- Vol. 42 (12) , 455.e1-455.e8
Lymph node density as a prognostic marker of relapse in patients who underwent primary retroperitoneal lymph node dissection