Autosomal recessive (infantile) polycystic kidney disease demonstrated by Tc-99m DMSA renal imaging

Area of Science:

• Pediatric Nephrology
• Nuclear Medicine Imaging

Background:

• Infantile polycystic kidney disease (IPKD) is a severe genetic disorder affecting neonates.
• Distinguishing IPKD from other pediatric renal diseases is crucial for timely management.
• Tc-99m DMSA scintigraphy is a common imaging modality for evaluating renal morphology and function in children.

Observation:

• A neonate diagnosed with IPKD underwent Tc-99m DMSA imaging.
• The imaging demonstrated enlarged kidneys with a diffuse and symmetric distribution of the radiopharmaceutical.
• This observed pattern contrasted with the multiple cystic lesions typically described in adult polycystic kidney disease.

Findings:

• The Tc-99m DMSA uptake pattern in this IPKD case was diffuse and symmetric, highlighting enlarged kidneys.
• This specific scintigraphic finding appears distinct from the heterogeneous, multifocal cystic changes seen in adult polycystic kidney disease.
• The observed pattern suggests potential pathognomonic characteristics for infantile polycystic kidney disease.

Implications:

• Tc-99m DMSA imaging may offer a characteristic diagnostic signature for IPKD in neonates.
• This imaging pattern could aid in differentiating infantile polycystic kidney disease from other pediatric renal cystic diseases.
• Further studies validating this finding could refine diagnostic protocols for neonatal renal imaging.