Adult renal myoepithelial hamartoma

Area of Science:

• Nephrology
• Oncology
• Pathology

Background:

• Renal tumors can present with diverse imaging findings.
• Hamartomas are benign tumors composed of disorganized tissue elements normally found in the affected organ.
• Myoepithelial tumors are rare in the kidney.

Observation:

• A renal myoepithelial hamartoma presented as a lucent filling defect in an adult female.
• The patient experienced gross hematuria, a significant clinical symptom.
• Preoperative imaging studies yielded conflicting diagnostic impressions.

Findings:

• Histopathological examination revealed a predominance of smooth muscle and incorporated tubuloepithelial elements.
• These features confirmed the diagnosis as a hamartoma of the myoepithelial type.
• Literature review indicated the extreme rarity of this specific lesion in adult patients.

Implications:

• This case expands the understanding of rare renal neoplasms.
• Accurate preoperative diagnosis of renal myoepithelial hamartoma can be challenging.
• Awareness of this entity is crucial for appropriate clinical and pathological management.