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Related Experiment Videos

Pneumonia can cause 111indium octreotide uptake.

T Yenson1, T Khalil, G Larcos

  • 1Department of Nuclear Medicine and Ultrasound, Westmead Hospital, Wentworthville, NSW, Australia.

Australasian Radiology
|May 31, 2006
PubMed
Summary

An indium-111 octreotide scan suggested a lung abnormality, but symptoms and imaging confirmed community-acquired pneumonia. Correlating scan findings with clinical presentation is crucial to prevent misdiagnosis.

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Area of Science:

  • Nuclear medicine imaging
  • Diagnostic radiology
  • Infectious disease diagnosis

Background:

  • Indium-111 octreotide scans are used for detecting neuroendocrine tumors like insulinoma.
  • Radiopharmaceutical uptake in non-target organs can occur and may mimic pathology.

Observation:

  • An 18-year-old woman presented with symptoms suggestive of insulinoma, undergoing an indium-111 octreotide scan.
  • The scan revealed increased radiotracer uptake at the right lung base.
  • The patient simultaneously reported a productive cough, and chest X-ray showed right lower lobe opacification.

Findings:

  • The lung opacification and octreotide uptake resolved after antibiotic treatment for community-acquired pneumonia.
  • This indicated the uptake was a false positive, likely due to inflammatory processes.

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Implications:

  • Clinical correlation is essential when interpreting octreotide scans to avoid misinterpreting inflammatory changes as neoplastic lesions.
  • This case highlights the importance of integrating imaging findings with patient symptoms and clinical context for accurate diagnosis.