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Current Fellows


Fatima Alruwaii, MBBS

Karen Trevino, MD


Pooja Agarwal, MBBS

Why I choose IU: I was impressed especially by the flow cytometry exposure we get during our training and by the volume of the cases (both routine and consults) we get to see. Getting hands on experience in analyzing flow cytometry was something I was looking for. There is good exposure to pediatric hematopathology as well. The faculty is very supportive and helpful along with great staff.

Personal interests: I enjoy hiking, camping, listening to old Hindi songs and dancing (classical Indian dance).

Academic interest: Hematopathology and Surgical pathology.

Brian Pahn, DO


Brandon Umphress, MD

An Indianapolis native, Brandon majored in biology and chemistry at the University of Indianapolis and completed medical school at Indiana University. From there he went on to complete a combined AP/CP residency at Northwestern McGaw Medical Center in Chicago, IL where he was awarded as the 2019 Anatomic Pathology Resident of the Year. Subsequent to residency, Brandon completed an oncologic surgical pathology fellowship at Memorial Sloan Kettering Cancer Center in New York City. He is now the current dermatopathology fellow at Indiana University.

Why I chose IU: When deciding on a fellowship, I was looking for the right combination of volume, academic resources, and personnel in order to become the best dermatopathologist possible while providing excellent patient care. The training environment and people here at IU far exceeded all of my expectations for these criteria. Serving as the dermatopathology fellow at Indiana continues to be a wonderful opportunity- one that I believe will set the foundation for the rest of my career.

Academic interests: medical education, digital pathology, artificial intelligence, dermatopathology/dermatology, and soft tissue pathology.

Personal interests: I enjoy spending time with family and friends, exercise/Crossfit, playing guitar, reading, and watching documentaries.


Logan DeWitt, DO

Genitourinary Pathology

Khaleel Al-Obaidy, MBBS

Khaleel has earned his medical degree from the University of Dammam, college of medicine in the Kingdom of Saudi Arabia. He was then appointed as a teaching assistant in the department of pathology at the same medical school. He moved to the United States where he started his AP/CP pathology residency at Detroit Medical Center/ Wayne State University and then moved to Indiana University where he completed his second half of training. In the final year of residency training, he was awarded the excellence in research award. He then finished a year of surgical pathology fellowship at Indiana University that was customized toward the head and neck pathology subspecialty. He was appointed as junior pathologist covering and signing out the head and neck cases for the last two-thirds of the year.

Why I chose IU: Being interested in GU pathology, this place had me thrived in this field. With the help of world-known GU pathologists and the program’s endless opportunities, I was able to frequently participate in national meetings with more than 30 abstracts, and 15 published papers in high impact journals. I was also able to describe and report the first kidney tumor with recurrent KRAS mutations, named “papillary renal neoplasm with reverse polarity” with the help and support of my late mentor “Professor David Grignon”. For this and more, I am confident that I will be ready to safely handle common and rare, challenging GU pathology cases and this program will certainly pave the way for doing so.

Personal Interests: I enjoy spending time with family, traveling to different countries especially nature and beach areas, and watching movies.

Academic interests: Genitourinary, head & neck, molecular & genetics pathology, as well as translational research.

Katrina Collins, MD

Why I chose IU: IU for pathology training is outstanding and provides an environment that allows me to develop professionally and broaden my experience. Gross and microscopic skills are strengthened daily, with an outstanding mix of routine and rare surgical specimens. I am building my ability to handle high volume, including numerous outside referrals and consult cases to gain strength in common areas of diagnostic difficulty.

Personal interests: I enjoy playing tennis, refinishing and restoring furniture, visiting flea markets, vintage thrift stores, and local breweries, knitting and crocheting, sewing, and making handmade paper crafts (mostly invitations and holiday cards)

Academic interests: Genitourinary pathology, Surgical pathology and Hematopathology

Alex Kravtsov, MD

Why I chose IU: I chose IU for a GU fellowship as this program has an unmatched balance of high volume cases in kidney, bladder, prostate, and testis pathology with world-renown expertise of pathologists dedicated to the teaching of fellows and residents on service. The GU faculty, allied staff and PAs are incredibly supportive and friendly. Having 3 fellow spots per year, this program also provides a good balance of clinical work and research.

Personal Interests: My personal interests are in IT and traveling. Even though a long-distance trips became difficult during the current COVID pandemic, Indianapolis is a beautiful city with lots of places to explore for everyone. It is large enough to have a highly efficient airport with many flights, lots of restaurants, parks and events, a beautiful zoo and Newfields gardens, but also in the same is affordable to live and doesn’t have much traffic.

Gastrointestinal Pathology

Shahbaz Khan, MBBS

Why IU: GI Pathology fellowship at IU provides an excellent training opportunity both in neoplastic and non-neoplastic gastrointestinal pathology. The case-mix is a diverse array of mucosal biopsies and resection specimens. IU Pathology is part of the NIH-funded clinical research network for study of non-alcoholic Steatohepatitis, NIH-funded Drug-Induced Liver Injury Network and an integral part of one of the largest liver transplant centers in the nation. This translates into a unique learning experience when it comes to “medical liver” and transplant pathology. I believe, as a fellow I come across an outstanding combination of routine and rare cases, as well as challenging consults and referrals for medical liver and pancreatic pathology. It’s a wonderful program with exceptionally experienced and very supportive faculty mentors, collegial environment, excellent residents and outstanding support staff.

Academic interests: Gastrointestinal and Hepatobiliary Pathology, Transplant Pathology, Hematopathology

Personal interests: Reading, watching sports

Surgical Pathology

Omer Saeed, MD

I earned my medical degree at the faculty of Medicine, University of Khartoum in my country Sudan. I have completed my AP/CP residency and cytopathology fellowship at Indiana University school of medicine. During residency I received two awards; an excellence in research award and professionalism and citizenship award. During my last year of residency, I served as chief resident. I am currently doing a customized surgical pathology fellowship with focus in gastrointestinal, liver and transplant pathology.

Why I chose IU: I chose IU for my current fellowship, previous fellowship and residency for the same reasons. We have a beautiful 6 floors, stand alone, laboratory building in the downtown area facing the canal. We have experienced and talented pathologists and an outstanding supportive staff. The variety and volume of the cases are great.

Personal interests: I enjoy reading novels and nonfictional books, watching tennis and soccer. Above all, I enjoy spending time with my family and friends and the occasional walk on the cultural trail and along the canal.

Academic interests: Surgical pathology, Gastrointestinal pathology, and Soft tissue

Blood Bank

Arzu Gonulalan, MD


Drew Bell, PhD

Why I Chose IU: IU Health’s clinical microbiology lab is a collegial and encouraging environment for fellows in training. Our test volume ensures that we encounter interesting and unusual cases, and grants experience in operating in an increasingly centralized laboratory. We have extensive collaboration with industry leaders, which provides opportunities to evaluate and influence the next generation of microbiology diagnostics.

Academic Interests: During my fellowship I have focused on developing antimicrobial susceptibility testing, nucleic acid amplification testing, and other molecular diagnostic methods.

Personal Interests: Outside the lab I enjoy backpacking, homebrewing, and tabletop gaming.

Ryan Demkowicz, MD

Why I chose IU for fellowship: I chose IU for fellowship because it gives me the opportunity to work with excellent staff who are not only experts in their field but also great educators. The microbiology laboratory is large and has all the new and exciting technology that a laboratory needs to be successful.

Personal interests: I enjoy reading with an interest in medieval and ancient civilization. I hike multiple times a week and generally enjoy the outdoors. I am also a big baseball fan.

Academic interests: Infectious Disease Pathology, Mycology, Quality and Patient Safety

Laurice Flowers, PhD