Presentation
Known COPD patient attends with shortness of breath. Patient still smoking.
Patient Data
Age: 65
Gender: Female
From the case:
Nipple markers
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Info

Bilateral radio-opacities inside the placed nipple markers.
Confirms normal nipple shadow, not intra-pulmonary pathology.
Case Discussion
A small radio-opacity, especially if unilateral projected over the lower thorax, may be a normal nipple outline or a intra-pulmonary lesion.
A repeat film with skin surface nipple markers applied, helps confirm, which is it and if further investigation is needed.
Simple, but effective.