Gallium scanning in lymphoid interstitial pneumonitis of children with AIDS

Area of Science:

• Pediatric Pulmonology
• Pediatric Infectious Diseases
• Nuclear Medicine Imaging

Background:

• Lymphoid interstitial pneumonitis (LIP) is a significant pulmonary complication in pediatric patients with acquired immune deficiency syndrome (AIDS) and human immunodeficiency virus (HIV) infection.
• Accurate diagnosis of pulmonary complications in children with AIDS is crucial for appropriate management.
• Gallium scintigraphy is a commonly used imaging modality for evaluating pulmonary infections in immunocompromised patients.

Observation:

• This study reports gallium scan findings in two pediatric patients diagnosed with AIDS and LIP.
• Both patients presented with diffuse, increased radionuclide concentration throughout the lungs on gallium scintigraphy.
• The observed gallium uptake pattern in LIP was indistinguishable from that typically seen in Pneumocystis carinii pneumonia (PCP).

Findings:

• Gallium scintigraphy can demonstrate diffuse pulmonary uptake in pediatric patients with AIDS and LIP.
• The scintigraphic pattern of LIP in children with AIDS is similar to that of PCP.
• This finding presents a diagnostic challenge in differentiating between LIP and PCP based solely on gallium scan results.

Implications:

• Nuclear medicine practitioners should consider LIP as a differential diagnosis for diffuse increased gallium uptake in the lungs of children with AIDS.
• Referring physicians should be aware that gallium scintigraphy findings in LIP can mimic PCP in this patient population.
• This underscores the importance of integrating imaging findings with clinical and other diagnostic data for accurate diagnosis and patient management.