HemoChat

Evidence-Based AI Medical Search

← Back to guidelines
Nephrology62 papers

Ossifying renal tumor

Last edited: 4/14/2026

Overview

Ossifying renal tumor of infancy is an extremely rare benign lesion characterized by the presence of bone formation within the tumor tissue. Only a handful of cases have been reported in the literature, highlighting its unique histological features 19.

Diagnosis

  • Clinical Presentation: Typically identified in infancy with nonspecific symptoms or incidental findings 19.
  • Imaging: Ultrasonography and CT scans often reveal a well-defined mass with calcifications or ossification patterns 19.
  • Histological Confirmation: Definitive diagnosis requires histopathological examination showing osteoblastic differentiation within the tumor cells 19.

    • Management

  • Surgical Excision: Complete surgical removal is generally recommended to ensure complete removal and rule out other potential diagnoses 19.
  • Observation: In asymptomatic cases, careful observation may be considered, especially if imaging suggests a benign nature 19.

    • Special Populations

  • Infancy: Focuses on early detection and management due to the age-specific presentation 19.

    • Key Recommendations

  • Surgical Excision for Definitive Diagnosis and Treatment: Perform surgical excision to confirm diagnosis and ensure complete removal, especially in infants 19 (Evidence: Expert opinion).
  • Imaging for Characterization: Utilize ultrasonography and CT scans for detailed characterization of the tumor, identifying ossification patterns 19 (Evidence: Expert opinion).
  • Histological Examination Essential: Conduct histopathological examination to confirm osteoblastic differentiation and rule out other renal lesions 19 (Evidence: Expert opinion).

    • References

    1 Szymanski KW, Pessoa RR, Kim JK, Buchanan AF, Hecht SL, Walker JP et al.. Lymph Node Sampling in Pediatric Renal Tumors: Survey of Current Practices and Impact of Education. Urology 2025. link 2 Junker T, Stage N, Thorlund MG, Rasmussen BSB, Mussmann BR, Nielsen TK et al.. CT-Guided Percutaneous Cryoablation of Small Renal Masses: General Anesthesia Versus Conscious Sedation with Dexmedetomidine. Cardiovascular and interventional radiology 2025. link 3 Schaarschmidt BM, Zensen S, Kesch C, Dertnig T, Opitz M, Drews M et al.. Current use of percutaneous ablation in renal tumors: an analysis of the registry of the German Society for Interventional Radiology and Minimally Invasive Therapy. European radiology 2025. link 4 Li J, Yang X, Chu G, Feng W, Ding X, Yin X et al.. Application of Improved Robot-assisted Laparoscopic Telesurgery with 5G Technology in Urology. European urology 2023. link 5 Abdessater M, Kanbar A, Comperat E, Dupont-Athenor A, Alechinsky L, Mouton M et al.. Renal Oncocytoma: An Algorithm for Diagnosis and Management. Urology 2020. link 6 Bertolo R, Autorino R, Fiori C, Amparore D, Checcucci E, Mottrie A et al.. Expanding the Indications of Robotic Partial Nephrectomy for Highly Complex Renal Tumors: Urologists' Perception of the Impact of Hyperaccuracy Three-Dimensional Reconstruction. Journal of laparoendoscopic & advanced surgical techniques. Part A 2019. link 7 Alsaikhan N, Alshehri W, Cassidy F, Aganovic L, Vahdat N. Renal tumor structured reporting including nephrometry score and beyond: what the urologist and interventional radiologist need to know. Abdominal radiology (New York) 2019. link 8 Hebbadj S, Cazzato RL, Garnon J, Shaygi B, Buy X, Tsoumakidou G et al.. Safety Considerations and Local Tumor Control Following Percutaneous Image-Guided Cryoablation of T1b Renal Tumors. Cardiovascular and interventional radiology 2018. link 9 Kakarala B, Frangakis CE, Rodriguez R, Georgiades CS. Hemorrhagic Complications of Percutaneous Cryoablation for Renal Tumors: Results from a 7-year Prospective Study. Cardiovascular and interventional radiology 2016. link 10 Vora A, Brodsky R, Nolan J, Ram S, Richter L, Yingling C et al.. Incidence of postembolization syndrome after complete renal angioinfarction: a single-institution experience over four years. Scandinavian journal of urology 2014. link 11 Wang L, Liu B, Wu Z, Yang Q, Chen W, Xu Z et al.. A matched-pair comparison of laparoendoscopic single-site surgery and standard laparoscopic radical nephrectomy by a single urologist. Journal of endourology 2012. link 12 Haddad RL, Patel MI, Vladica P, Kassouf W, Bladou F, Anidjar M. Percutaneous radiofrequency ablation of small renal tumors using CT-guidance: a review and its current role. Urology journal 2012. link 13 Breda A, Lam JS, Riggs S, Leppert JT, Gui D, Said JW et al.. In vivo efficacy of laparoscopic assisted percutaneous renal cryotherapy: evidence based guidelines for the practicing urologist. The Journal of urology 2008. link 14 Ukimura O, Gill IS. Imaging-assisted endoscopic surgery: Cleveland Clinic experience. Journal of endourology 2008. link 15 Zorn KC, Orvieto MA, Mikhail AA, Lyon MB, Gerber GS, Steinberg GD et al.. Case report: radiofrequency ablation-induced renal-pelvic obstruction resulting in nephrectomy. Journal of endourology 2007. link 16 Gupta A, Allaf ME, Kavoussi LR, Jarrett TW, Chan DY, Su LM et al.. Computerized tomography guided percutaneous renal cryoablation with the patient under conscious sedation: initial clinical experience. The Journal of urology 2006. link00247-8) 17 Naslund MJ, Dement S, Marshall FF. Malignant renal schwannoma. Urology 1991. link80243-z) 18 Leitner J, Siegal A, Shachor D, Freund U. Spontaneous rupture of renal oncocytoma with acute abdomen. Case report. Acta chirurgica Scandinavica 1988. link 19 Jerkins GR, Callihan TR. Ossifying renal tumor of infancy. The Journal of urology 1986. link45538-8) 20 Schneider J, Hertel E. Unilateral renal oncocytoma: a case report. International urology and nephrology 1986. link 21 Apuzzio JJ, Unwin W, Adhate A, Nichols R. Prenatal diagnosis of fetal renal mesoblastic nephroma. American journal of obstetrics and gynecology 1986. link90621-6) 22 Mitchell A, Fellows GJ, Smith JC. Partial nephrectomy for renal haemangioma. Journal of the Royal Society of Medicine 1982. link 23 Bono AV, Caresano A, Roggia A, Gianneo E. A case of renal oncocytoma. European urology 1980. link 24 Wilms G, Baert AL, Marchal G, Bruneel M. CT demonstration of gas formation after renal tumor embolization. Journal of computer assisted tomography 1979. link

    Original source

    1. [1]
      Lymph Node Sampling in Pediatric Renal Tumors: Survey of Current Practices and Impact of Education. — Szymanski KW, Pessoa RR, Kim JK, Buchanan AF, Hecht SL, Walker JP et al. Urology (2025)
    2. [2]
      CT-Guided Percutaneous Cryoablation of Small Renal Masses: General Anesthesia Versus Conscious Sedation with Dexmedetomidine. — Junker T, Stage N, Thorlund MG, Rasmussen BSB, Mussmann BR, Nielsen TK et al. Cardiovascular and interventional radiology (2025)
    3. [3]
      Current use of percutaneous ablation in renal tumors: an analysis of the registry of the German Society for Interventional Radiology and Minimally Invasive Therapy. — Schaarschmidt BM, Zensen S, Kesch C, Dertnig T, Opitz M, Drews M et al. European radiology (2025)
    4. [4]
      Application of Improved Robot-assisted Laparoscopic Telesurgery with 5G Technology in Urology. — Li J, Yang X, Chu G, Feng W, Ding X, Yin X et al. European urology (2023)
    5. [5]
      Renal Oncocytoma: An Algorithm for Diagnosis and Management. — Abdessater M, Kanbar A, Comperat E, Dupont-Athenor A, Alechinsky L, Mouton M et al. Urology (2020)
    6. [6]
      Expanding the Indications of Robotic Partial Nephrectomy for Highly Complex Renal Tumors: Urologists' Perception of the Impact of Hyperaccuracy Three-Dimensional Reconstruction. — Bertolo R, Autorino R, Fiori C, Amparore D, Checcucci E, Mottrie A et al. Journal of laparoendoscopic & advanced surgical techniques. Part A (2019)
    7. [7]
      Renal tumor structured reporting including nephrometry score and beyond: what the urologist and interventional radiologist need to know. — Alsaikhan N, Alshehri W, Cassidy F, Aganovic L, Vahdat N Abdominal radiology (New York) (2019)
    8. [8]
      Safety Considerations and Local Tumor Control Following Percutaneous Image-Guided Cryoablation of T1b Renal Tumors. — Hebbadj S, Cazzato RL, Garnon J, Shaygi B, Buy X, Tsoumakidou G et al. Cardiovascular and interventional radiology (2018)
    9. [9]
      Hemorrhagic Complications of Percutaneous Cryoablation for Renal Tumors: Results from a 7-year Prospective Study. — Kakarala B, Frangakis CE, Rodriguez R, Georgiades CS Cardiovascular and interventional radiology (2016)
    10. [10]
      Incidence of postembolization syndrome after complete renal angioinfarction: a single-institution experience over four years. — Vora A, Brodsky R, Nolan J, Ram S, Richter L, Yingling C et al. Scandinavian journal of urology (2014)
    11. [11]
      A matched-pair comparison of laparoendoscopic single-site surgery and standard laparoscopic radical nephrectomy by a single urologist. — Wang L, Liu B, Wu Z, Yang Q, Chen W, Xu Z et al. Journal of endourology (2012)
    12. [12]
      Percutaneous radiofrequency ablation of small renal tumors using CT-guidance: a review and its current role. — Haddad RL, Patel MI, Vladica P, Kassouf W, Bladou F, Anidjar M Urology journal (2012)
    13. [13]
      In vivo efficacy of laparoscopic assisted percutaneous renal cryotherapy: evidence based guidelines for the practicing urologist. — Breda A, Lam JS, Riggs S, Leppert JT, Gui D, Said JW et al. The Journal of urology (2008)
    14. [14]
      Imaging-assisted endoscopic surgery: Cleveland Clinic experience. — Ukimura O, Gill IS Journal of endourology (2008)
    15. [15]
      Case report: radiofrequency ablation-induced renal-pelvic obstruction resulting in nephrectomy. — Zorn KC, Orvieto MA, Mikhail AA, Lyon MB, Gerber GS, Steinberg GD et al. Journal of endourology (2007)
    16. [16]
      Computerized tomography guided percutaneous renal cryoablation with the patient under conscious sedation: initial clinical experience. — Gupta A, Allaf ME, Kavoussi LR, Jarrett TW, Chan DY, Su LM et al. The Journal of urology (2006)
    17. [17]
      Malignant renal schwannoma. — Naslund MJ, Dement S, Marshall FF Urology (1991)
    18. [18]
      Spontaneous rupture of renal oncocytoma with acute abdomen. Case report. — Leitner J, Siegal A, Shachor D, Freund U Acta chirurgica Scandinavica (1988)
    19. [19]
      Ossifying renal tumor of infancy. — Jerkins GR, Callihan TR The Journal of urology (1986)
    20. [20]
      Unilateral renal oncocytoma: a case report. — Schneider J, Hertel E International urology and nephrology (1986)
    21. [21]
      Prenatal diagnosis of fetal renal mesoblastic nephroma. — Apuzzio JJ, Unwin W, Adhate A, Nichols R American journal of obstetrics and gynecology (1986)
    22. [22]
      Partial nephrectomy for renal haemangioma. — Mitchell A, Fellows GJ, Smith JC Journal of the Royal Society of Medicine (1982)
    23. [23]
      A case of renal oncocytoma. — Bono AV, Caresano A, Roggia A, Gianneo E European urology (1980)
    24. [24]
      CT demonstration of gas formation after renal tumor embolization. — Wilms G, Baert AL, Marchal G, Bruneel M Journal of computer assisted tomography (1979)
    Share:TwitterRedditLinkedIn

    HemoChat

    by SPINAI

    Evidence-based clinical decision support powered by SNOMED-CT, Neo4j GraphRAG, and NASS/AO/NICE guidelines.

    ⚕ For clinical reference only. Not a substitute for professional judgment.

    © 2026 HemoChat. All rights reserved.
    Research·Pricing·Privacy & Terms·Refund·SNOMED-CT · NASS · AO Spine · NICE · GraphRAG