As of Monday, Brandão’s cause of death remained a mystery.

“The doctors still haven’t said what really happened to my daughter and what killed her,” Brandão’s mother, Thays Brandão, told Brazilian news outlet G1.

Millena Brandão has been experiencing headaches, leg discomfort, fatigue, appetite loss, and fainting since April 24.

She went to two state-run hospitals in São Paulo and a city urgent care centre during that time.

Before further testing showed a brain tumour, doctors thought the young model had dengue fever.

Millena Brandão made her acting debut in October 2023 on SBT [Brazilian Television System] and had appeared “A infância de Romeu e Julieta” [Romeo and Juliet’s Childhood] and “A Caverna Encantada [The Enchanted Cave].”

Another mother of a two-year-old daughter, Thays Brandão, expressed doubts about the treatment her daughter received from the doctors.

On April 24, Millena Brandão was seen