Matheus Hemais

6th-year medical student | Faculty of Medicine of Petropolis, Rio de Janeiro 🇧🇷 | Aspiring Neurosurgeon 🧠🔬 | Chief Strategy Officer at MedSchool Mentor

[Michael T. Lawton, MD @mtlawton]

Sylvian fissure is a special place for AVMs b/c of MCA trunks, veins, depth, important surrounding cortex. Depending on which surface the AVM is based (frontal, temporal, insular, or cisternal), nidus-artery relationships change. Feeding arteries need to be “skeletonized,” or trimmed of supplying branches while preserving trunks that pass thru….

[Matheus Hemais @MHemais]

@chandraankush @NeurosurgUTH @UTMDAnderson @CNSResidents @NSTumorSection 👏🏽👏🏽👏🏽

[Matheus Hemais @MHemais]

@AliBaajMD 👏🏽👏🏽👏🏽

[Matheus Hemais @MHemais]

@MentorMedschool @StanfordNsurg 👏🏽👏🏽👏🏽

[MedSchool Mentor @MentorMedschool]

Join us for an inspiring session with Dr. Odette Harris, MD, MPH, Endowed Paralyzed Veterans of America Professor of Spinal Cord Injury Medicine, Professor of Neurosurgery and Vice Chair of the Department of Neurosurgery at Stanford University School of Medicine.

Dr. Harris is a nationally and internationally recognized leader in traumatic brain injury, peripheral nerve surgery, and neurotrauma care. She holds key leadership roles including Director of the Defense Veterans Brain Injury Center, Director of Brain Injury in the Department of Neurosurgery, and Deputy Chief of Staff for Rehabilitation at the VA Palo Alto Health Care System.

Her contributions to neurosurgery and neurotrauma have earned her prestigious honors such as the Van Wagenen Fellowship Award, Ebony Power 100 Award, Aspen Institute Health Innovators Fellowship, service as President of Women in Neurosurgery and RISE Award (Reach, Inspire, Serve and Engage) - The Stanford Medicine Alumni Association (2020/ 2021).

In this session, Dr. Harris will share insights from her journey across science, surgery, leadership, and mentorship, offering lessons in innovation, resilience, and the advancement of medicine.

📅 Date: Friday, November 21th, 2025
🕦 Time: 11 am – 12 pm EST

🔗 Registration link: https://t.co/qHjBKZgNqa

[Michael T. Lawton, MD @mtlawton]

For the skull base surgeon, what’s the opposite of a skull base tumor? A tumor not connected to bone or skull; not encasing arteries or entangling cranial nerves; and not just another glioma. How about the 4th ventricular ependymoma…

[Matheus Hemais @MHemais]

@MentorMedschool @DenverHealthMed @Jun_kiim @chandraankush @FabioGrassia11 👏🏽🔥

[MedSchool Mentor @MentorMedschool]

Join us for an inspiring conversation with Dr. Fabio Grassia, Chief of Neurosurgery and Director of Brain Tumor and Skull Base Program at Denver Health (@DenverHealthMed) .

As an international medical graduate who completed his medical training at the University of Catania in Italy, Dr. Grassia has built a distinguished career in American academic neurosurgery. He specializes in complex neurosurgical care, with expertise in skull base surgery, brain tumor treatment, and surgical epilepsy, utilizing advanced surgical techniques including neurosurgical robotics, intraoperative imaging, and fluorescence-guided resection.

His research has contributed to improving patient education through innovative technologies and advancing understanding of pediatric epilepsy and deep brain stimulation. Dr. Grassia is committed to providing high-quality neurosurgical care to diverse patient populations at Denver Health, demonstrating the impact that international physicians bring to American healthcare.

🗓 Wednesday, November 12th, 2025
🕔 5:00–6:00 PM EST

🔗 Register now via the QR code or through the following link:
https://t.co/YUID4G7sxS

#LeadersInMedicine #Neurosurgery #MedschoolMentor #MedicalEducation #MedschoolMentor #IMG

[Michael T. Lawton, MD @mtlawton]

The large central pontine cavernoma is a dilemma: not on pial surface, requires tissue transgression, highly morbid when bleeding. Middle cerebellar peduncle covering lateral pons can be traversed, but beware “invisible triangle”: sup. cerebellar peduncle above, corticospinal tract in front, pontine nuclei posteriorly…

[Jennifer Guerriero, PhD @JennGuerriero]

PSA: Stop calling macrophages in tissue M1 or M2. These are not states that exist in biology. The only use of M1 is a macrophage cultured ex vivo with LPS and IFNg; and for M2: IL-4/13/10. Macrophages in tissues are highly complex and diverse and do not resemble either of the aforementioned M1/M2 states. M1/M2 language causes confusion and sets the field back. Refer to your macrophages by the molecules they express and the cytokines they make.

[Jun Kim @Jun_kiim]

Earlier this week, @MentorMedschool had the privilege of hosting Dr. Chetan Bettegowda (@BettegowdaMDPHD), the Harvey Cushing Professor and Chair of Neurosurgery at Johns Hopkins University School of Medicine (@HopkinsNsurg) , for our Leaders in Medicine webinar.

Dr. Bettegowda shared his remarkable journey — from his roots in rural India to becoming a world-renowned neurosurgeon-scientist. He spoke on the power of mentorship, teamwork, and perseverance, emphasizing how collective effort drives progress in patient care and discovery.

From pioneering advances in cancer genetics and liquid biopsy for brain tumors, to mentoring the next generation of physician-scientists, Dr. Bettegowda reminded us that medicine is not only about individual skill but about shared purpose, compassion, and collaboration.

Thank you, Dr. Bettegowda, for lighting the path for the next generation of leaders in medicine.

https://t.co/UhSshWszKs

[MedSchool Mentor @MentorMedschool]

Join us for an inspiring session with Dr. Chetan Bettegowda, Harvey Cushing Professor and Director of Neurosurgery at Johns Hopkins University School of Medicine, and Jennison and Novak Families Professor of Neurosurgery.

Dr. Bettegowda is internationally recognized as a leading neurosurgeon-scientist whose groundbreaking work has transformed the field of neuro-oncology. His research focuses on understanding the genetic underpinnings of brain and spinal tumors and translating these discoveries into innovative diagnostic and therapeutic strategies, including the development of liquid biopsies for central nervous system tumors.

In this session, Dr. Bettegowda will reflect on his journey at the intersection of science, surgery and leadership, sharing lessons on innovation, resilience and the role of mentorship in advancing medicine.

📅 Date: Monday, September 8th, 2025
🕦Time: 6–7 pm EST
🔗 Register now: https://t.co/ccCEPXVyM6

#LeadersInMedicine #Neurosurgery #MedicalEducation #MedicalMentorship

[MedSchool Mentor @MentorMedschool]

How to stand out during your Sub-Internships?

During our conversation with Neurosurgery Program Directors, you heard first hand the weight that a good sub-Internship in Neurosurgery or any Surgical Specialty can have in your ERAS Application. Take a look at what neurosurgery residents look for in their rotating medstudents!

You can find the full “How to Ace your Sub-I” and our “Program Director Panel” webinar on our YouTube channel.

https://t.co/48Eypl1MhR

#medschoolmentor #medicaleducation #neurosurgery #surgery #residency

[MedSchool Mentor @MentorMedschool]

September is filled with inspiration, leadership, and wisdom in neurosurgery

This month, we are honored to welcome some of the most distinguished leaders, program directors, and trailblazers in medicine to our Webinar Series.

✨From carving new paths in neurosurgery and leadership
✨ To guiding the next generation through the residency match
✨ To amplifying the voices and journeys of women in medicine

Our speakers are here to share their stories, lessons, and the power of persistence.

📅 Mark your calendars and be part of these transformative conversations. Registration opens one week before each event!
💡 Whether you’re a student, resident, or practicing physician, this is your chance to learn, grow, and shape your own path in medicine.

#LeadersInMedicine #InsideTheMatch #WomenInMedicine #Neurosurgery #ResidencyMatch #MedicalEducation #NeurosurgeryResidency

[Matheus Hemais @MHemais]

Must watch event for every med student that wants to ace Sub-I’!

It’s not a neurosurgery restricted knowledge!

[MedSchool Mentor @MentorMedschool]

Our “How to Ace Your Neurosurgery Sub-I” webinar led by our CAO @chandraankush was a great success!

Grateful to the incredible panel of residents who joined us to share their insights, strategies, and stories 🧠💬. Thank you to the future neurosurgeons who spent their evening investigating in their future!

🎥 Watch the full session on YouTube:
https://t.co/K5CvKr88Ku

#Neurosurgery #SubI #MedSchoolMentor #FutureNeurosurgeons #MedicalMentorship #ResidencyPrep #NeurosurgeryMatch

[Matheus Hemais @MHemais]

What a wonderful human being!

[Jun Kim @Jun_kiim]

Yesterday @MentorMedschool, we had the honor of hosting @drdavidlanger , Professor & Chair of Neurosurgery @lenoxhill.

Dr. Langer not only shared his journey, but his mindset, his heart, and his philosophy of #leadership in medicine.

He reminded us that #mentorship isn’t about prestige��it’s about presence. It’s about the people who make us better, who believe in us before we believe in ourselves, and who challenge us to grow.

We’re deeply grateful for your time, Dr. Langer, your wisdom, and the example you set.

https://t.co/pXYoDdQn8r

@MHemais @chandraankush @CarlottaRanall @LenoxNeurosurg

[MedSchool Mentor @MentorMedschool]

We believe in the power of mentorship and the responsibility to inspire the next generation of healthcare leaders. Join us for our exclusive webinars featuring Dr. @AliBaajMD (@NeurosurgeryNM), Dr. David Sandberg (@NeurosurgUTH & @MDAndersonNews), and Dr. Henry Brem (@HopkinsNsurg) - three of the most visionary leaders in neurosurgery today.

In this conversation, we’ll explore what it truly means to lead, to innovate, and to shape the future of medicine through groundbreaking research, clinical excellence, and global collaboration. This is more than a webinar. It is a moment to learn from pioneers whose persistent efforts have pushed the boundaries of the neurosurgical field.

#LeadersInMedicine #MedicalEducation #Neurosurgery #Mentorship #HealthcareLeadership #MedSchoolMentor

[Matheus Hemais @MHemais]

@MentorMedschool @AliBaajMD @NeurosurgeryNM @NeurosurgUTH @MDAndersonNews @HopkinsNsurg @chandraankush @Jun_kiim @pbborges9 Great events coming up in June! Excited to hear from this outstanding professionals.

[Matheus Hemais @MHemais]

@AliBaajMD Thank you, Dr. Baaj! Really looking forward to our webinar!

[Matheus Hemais @MHemais]

@JuanAvilaMD @Jun_kiim Congratulations!