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Malignant neoplasm of urinary system — Clinical Guidelines

Overview

Malignant neoplasms of the urinary system encompass cancers affecting the bladder, kidney, prostate, and ureter, requiring multidisciplinary management including surgical, medical, and supportive care approaches. 1 4

Diagnosis

Histopathological examination: Essential for definitive diagnosis, often requiring biopsy samples. 4

Immunohistochemistry (IHC): Utilized for differential diagnosis in urologic pathology, particularly for grading and subtyping tumors. 4

Imaging studies: CT, MRI, and ultrasound used for staging and assessing tumor extent. 1

Management

Surgical interventions:

- Radical prostatectomy: For localized prostate cancer. 1 - Partial nephrectomy: For localized renal tumors in selected patients. 1 - Radical nephrectomy/nephroureterectomy: For advanced renal or ureteral malignancies. 1 - Minimally invasive techniques: Robotic surgery shows efficacy in reducing complications and improving outcomes compared to open surgery. 1

Adjuvant therapies:

- Radiation therapy: Post-surgical management for high-risk cases. - Systemic chemotherapy: For metastatic disease, specific regimens depend on tumor type and stage. 4

Special Populations

Pediatrics: Tissue engineering approaches explored for reconstructive surgeries post-malignancy treatment to minimize complications. 2

Elderly: Considerations for surgical approach (minimally invasive vs. open) based on operative time and length of stay impact. 3

Key Recommendations

Utilize immunohistochemistry for accurate subtyping and grading of urologic malignancies to guide treatment decisions. (Evidence: Strong 4)

Minimally invasive surgical techniques, such as robotic single-port surgery, can be effectively employed for managing urologic malignancies, potentially reducing complications and hospital stay. (Evidence: Moderate 1 3)

Tailor surgical approaches in elderly patients considering the relationship between operative time and length of hospital stay to optimize outcomes. (Evidence: Moderate 3)

References

1 Kim KH, Ahn HK, Kim M, Yoon H. Technique and perioperative outcomes of single-port robotic surgery using the da Vinci SP platform in urology. Asian journal of surgery 2023. link 2 Casarin M, Morlacco A, Dal Moro F. Tissue Engineering and Regenerative Medicine in Pediatric Urology: Urethral and Urinary Bladder Reconstruction. International journal of molecular sciences 2022. link 3 Monn MF, Jain R, Kaimakliotis HZ, Flack CK, Koch MO, Boris RS. Examining the relationship between operative time and hospitalization time in minimally invasive and open urologic procedures. Journal of endourology 2014. link 4 Amin MB, Epstein JI, Ulbright TM, Humphrey PA, Egevad L, Montironi R et al.. Best practices recommendations in the application of immunohistochemistry in urologic pathology: report from the International Society of Urological Pathology consensus conference. The American journal of surgical pathology 2014. link

Malignant neoplasm of urinary system