Hemosiderin laden macrophage can be found due to;
1) auto immune mediated disease; these have systemic involvement.
2) diffuse interstitial pulmonary diseases
3) diffuse pulmonary hemorrhage syndromes.
All of these are non cancerous conditions.
Please feel free for your follow up questions.
I would be happy to assist you further, if you need any more information.
You are very welcome.
Usually this is microscopic leak. This can be one time episode also. This may not worsen.
It is privilege assisting you.