Genitourinary neurofibromas: clinical significance

Area of Science:

• Urology
• Oncology
• Genetics

Background:

• Neurofibromas are benign tumors arising from nerve sheath cells.
• Von Recklinghausen's disease (neurofibromatosis type 1) is a genetic disorder associated with neurofibroma development.
• Genitourinary involvement by neurofibromas is uncommon.

Observation:

• Two distinct cases of genitourinary neurofibromas are presented.
• Case 1: A large solitary neurofibroma on the glans penis.
• Case 2: A pelvic plexiform neurofibroma in young women with von Recklinghausen's disease, causing urinary obstruction.

Findings:

• Solitary genitourinary neurofibromas typically require simple local excision.
• Plexiform neurofibromas, particularly in the pelvis, can cause significant urinary obstruction necessitating urinary diversion.
• Recurrence and malignant transformation are rare in solitary neurofibromas but more common in plexiform types.

Implications:

• Highlights the diverse clinical presentations of genitourinary neurofibromas.
• Emphasizes the importance of distinguishing between solitary and plexiform types for appropriate management.
• Underscores the need for vigilant monitoring for recurrence and malignant degeneration in plexiform neurofibromas.