Renal medullary carcinoma: A national analysis of 159 patients

Brian Ezekian1, Brian Englum1, Brian F Gilmore1

  • 1Department of Surgery, Duke University Medical Center, Durham, North Carolina.

Abstract

Insights

Renal medullary carcinoma (RMC) has a dismal median survival under 8 months. Metastatic disease at diagnosis is the primary negative prognostic factor for this rare cancer.

Area of Science:

  • Oncology
  • Rare Cancers
  • Renal Cell Carcinoma

Background:

  • Renal medullary carcinoma (RMC) is an aggressive cancer predominantly affecting young males with sickle cell trait.
  • Fewer than 220 cases of RMC have been reported in medical literature, highlighting its rarity.
  • Understanding RMC presentation, treatment, and outcomes is crucial due to its poor prognosis.

Purpose of the Study:

  • To define the typical presentation, treatments, and outcomes of RMC.
  • To identify factors associated with mortality in RMC patients.
  • To analyze the largest cohort of RMC patients to date.

Main Methods:

  • Utilized the National Cancer Database to identify RMC patients under 40 diagnosed between 1998 and 2011.
  • Analyzed patient and tumor characteristics, treatment details, and overall survival (OS).
  • Employed multivariable regression analysis to identify mortality predictors.

Main Results:

  • Identified 159 RMC patients: 71% male, 87% African American, 71% with metastatic disease.
  • Median survival was 7.7 months; patients with metastatic disease had significantly worse survival (4.7 vs. 17.8 months).
  • Metastatic disease at presentation was linked to lower surgical rates (42% vs. 91%) and worse survival; age and tumor size did not impact OS.

Conclusions:

  • The largest RMC cohort reveals a dismal median survival of less than 8 months.
  • Metastatic disease at diagnosis is the primary negative prognostic indicator for RMC.
  • Age and tumor size were not associated with overall survival in RMC patients.