This is the 6459th most frequent Swedish word.
macchiarini
"Macchiarini" is not a Swedish word; it is a surname, most notably associated with surgeon Paolo Macchiarini.
The word 'Macchiarini' here is used as a proper noun, referring to a specific person known by that name.
Macchiarini är känd för sina kontroversiella metoder inom transplantationskirurgi.
Macchiarini is known for his controversial methods in transplant surgery.
The usage is as a possessive form of the proper noun 'Macchiarini', indicating that the experiments were conducted by him.
Jag läste en artikel om Macchiarinis experiment med konstgjorda organ.
I read an article about Macchiarini's experiments with artificial organs.
In this sentence, the proper noun 'Macchiarini' is used to refer to a notable case associated with the person.