Computed tomography guided microwave ablation for the treatment of clinical T1a renal cell carcinoma: a comparison to robot-assisted laparoscopic partial nephrectomy - Report - MDSpire
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Computed tomography guided microwave ablation for the treatment of clinical T1a renal cell carcinoma: a comparison to robot-assisted laparoscopic partial nephrectomy
Microwave Ablation vs Robot-Assisted Partial Nephrectomy for T1a Renal Cell Carcinoma
Overview
This retrospective study compared computed tomography-guided microwave ablation (MW) and robot-assisted laparoscopic partial nephrectomy (RAPN) in patients with clinical T1a renal cell carcinoma (RCC). MW was typically used in older, frailer patients with more comorbidities, while RAPN was performed in healthier patients. The study assessed safety, renal function preservation, and oncological outcomes over a median follow-up of 2.4 to 3.7 years.
Background
Partial nephrectomy is the preferred curative treatment for localized RCC due to better renal function preservation and comparable oncological outcomes versus radical nephrectomy. Robot-assisted laparoscopic partial nephrectomy (RAPN) is considered the safest surgical approach with reduced morbidity and shorter hospital stays. However, some patients are unsuitable for surgery due to comorbidities or prior abdominal surgeries. Ablation therapies, including microwave ablation (MW), offer minimally invasive alternatives for these patients, but direct comparisons with RAPN are limited. This study aimed to compare safety and oncological efficacy between MW and RAPN in T1a RCC.
Data Highlights
Characteristic
MW (n=68)
RAPN (n=301)
Median Age
Higher (exact value not provided)
Lower (exact value not provided)
Charlson Comorbidity Index (CCI)
Higher
Lower
ASA Score
≥ 2 (all patients)
Included ASA 1 patients (excluded for comparison)
Median Follow-up
2.4 years (95% CI 2.0–3.4)
3.7 years (95% CI 3.3–4.1)
Number of Patients for Oncological Analysis
51 (primary treatment)
266 (excluding benign histology)
Key Findings
MW was reserved for older, frailer patients with higher comorbidity and worse kidney function compared to RAPN patients.
Three MW procedures were aborted intraoperatively due to tumor proximity to critical structures.
RAPN cohort included some conversions to nephrectomy due to perioperative challenges.
Median follow-up was longer for RAPN (3.7 years) than MW (2.4 years).
Oncological analyses included only biopsy- or pathology-verified RCC cases, excluding benign histology and recurrent tumors for MW.
Clinical Implications
MW offers a viable, minimally invasive treatment alternative for patients with T1a RCC who are not candidates for surgery due to age, comorbidities, or prior abdominal surgeries. Careful patient selection and multidisciplinary evaluation are essential to optimize outcomes. Both treatment modalities require systematic postoperative imaging and follow-up to monitor for recurrence.
Conclusion
Computed tomography-guided microwave ablation is a safe and effective alternative to robot-assisted partial nephrectomy for selected patients with T1a RCC, particularly those with higher surgical risk. Further studies with longer follow-up are needed to confirm long-term oncological equivalence.
References
Copenhagen University Hospital, Herlev and Gentofte Hospital, Denmark -- Microwave Ablation Guided by Computed Tomography for T1a Renal Cell Carcinoma
