presenting vs introducing

Some examples from the web:

• COVID-19 presenting as stroke. Brain Behav Immun. 2020 Jul;87:115-119. doi: 10.1016/j.bbi.2020.04.077. Epub 2020 Apr 28.
• MI, even presenting as STEMI, also occurs in the absence of obstructive coronary artery disease (CAD) on angiography.^9–12 This type of MI is termed 'myocardial ...

Some examples from the web:

• By introducing deadly varroa mites into his hives.
• The cost of introducing it should therefore be met through European financing.
• Education and training programmes also play an important role in introducing alternative cultivation practices.
• Tell us the requirements for introducing NAS products.
• By somehow introducing this whole abuse thing.
• The instrument shall be set at zero by introducing a zero signal.
• We've been talking about introducing some competitive sports.
• Your rapporteur also proposes introducing the use of GPS systems as from 2008.
• The Commission is introducing comprehensive human rights training for its staff, in particular those serving in delegations in third countries.
• This decision amends the specific programme by introducing several conditions for deciding on the Community funding of such research.
• Nevertheless the notion that this objective would be better served by introducing a general financial transaction tax requires careful assessment.
• The Commission shall consider introducing a harmonised system as soon as possible.
• Creates legal clarity by introducing the generally accepted term of "Intended use".
• For this reason the Commission should assess existing support schemes and the possibility for introducing a harmonised market based scheme.
• This should be achieved by reinforcing the existing Community provisions, but also by introducing new compensatory measures.
• The rapporteur strengthens this approach by introducing further requirements.
• Possibility of introducing a European system for the process of matching fingerprints
• The logistical feat of simultaneously introducing banknotes and coins in 12 countries cannot be underestimated.
• Subject: Community interest in introducing an anti-dumping levy on footwear
• We want to make clearer rules, easily readable, unforgettable and introducing greater strictness.