Fungus death and cannabis in cancer patient- Contamination Issues ? Causation link

https://cdn.ampproject.org/c/sanfrancisco.cbslocal.com/2017/02/06/medical-marijuana-fungus-death-uc-davis-medical-center/amp/

Topical use of cannabis does not result in positive blood or urine tests

https://medicalmarijuana411.com/new-study-concludes-topical-marijuana-does-not-result-in-negative-drug-test/

NOTE-the heading of this article is misleading and contradicts the findings stated in the article.