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Updated: Nov 25, 2025

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Lo, the ever confounding nipple shadow!

W H Boo1, Y C Chan2

  • 1MD, UTC Ipoh Health Clinic, LB 21-22, Bangunan UTC Ipoh, Jalan Dato Onn Jaafar, Ipoh, Perak, Malaysia,

Malaysian Family Physician : the Official Journal of the Academy of Family Physicians of Malaysia
|December 17, 2020
PubMed
Summary
This summary is machine-generated.

A solitary pulmonary nodule (SPN) on chest imaging can be a nipple shadow, not a true lung abnormality. Recognizing this common artifact spares patients unnecessary tests and anxiety.

Keywords:
nipplenodulepulmonaryshadowsolitary

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Area of Science:

  • Pulmonary Medicine
  • Radiology
  • Diagnostic Imaging

Background:

  • Solitary pulmonary nodules (SPNs) detected on chest imaging cause significant patient and clinician concern.
  • Managing SPNs is challenging for primary care physicians due to a lack of uniform guidelines.

Observation:

  • A patient presented with prolonged cough and a unilateral SPN on chest radiograph.
  • Further examination revealed the "nodule" was a nipple shadow, an artifact that can mimic an SPN.

Findings:

  • The unilateral SPN was definitively identified as a nipple shadow.
  • This differentiation avoided invasive diagnostic procedures and patient distress.

Implications:

  • Nipple shadows are a common, benign finding that can simulate SPNs on chest imaging.
  • Awareness of this artifact can prevent unnecessary investigations and reduce patient anxiety associated with potential lung cancer diagnosis.