Assistant Professor Dr. Yasin K Ahmed is a Pathologist and Cytopathologist, certified by Anatomic Pathology Board, Clinical Pathology Board and the Cyptopathology Board. He has expertise in Surgical Pathology, Oncologic Pathology, Fine Needle Aspiration and Cyptopathology. He completed his residency at the St. John Hospital, an affiliate hospital of Wayne State University where he also served as Chief Resident. Asst. Prof. Dr. Ahmed has extensive experience and has worked as Attending Pathologist at the Quest Diagnostic/Ameripath, USA.
Dr. Selim Nasser obtained his medical degree from St. Joseph University in Beirut, Lebanon, and went on to complete his Pathology residency at the Massachusetts General Hospital, Harvard Medical School. Dr. Nasser's pursuit of excellence continued as he completed fellowships in both Cytopathology and Molecular Genetic Pathology, earning American Board certifications in Anatomic Pathology and Cytopathology.
Following his position as an instructor at Massachusetts General Hospital, Dr. Nasser returned to Lebanon in 2003. Throughout his career, he has held significant leadership roles in Pathology departments, making a lasting impact on the field. Dr. Nasser introduced innovative cancer protocols and advanced testing methods.
One of Dr. Nasser's notable achievements was the instrumental role he played in founding the Lebanese American University School of Medicine. He successfully developed the Pathology curriculum, directed the Pathology clerkship and residency program, and implemented digital histopathology and virtual teaching resources, enhancing the learning experience for future medical professionals.
Currently serving as the chair of the Pathology Department at LAU School of Medicine, Dr. Nasser continues to contribute significantly to the medical community. He has been actively involved in various international pathology societies. He is the past presidency and current vice-presidency of the Lebanese Society of Pathology.
Dr. Nasser's dedication to research is evident through his numerous contributions to over 40 publications in international journals. His research interests primarily focus on breast cancer biomarkers and gastrointestinal pathology.
Dr. Mukhopadhyay is Director of Pulmonary Pathology at the Cleveland Clinic, Associate Editor (Pulmonary) for the American Journal of Clinical Pathology and Associate Editor (Social Media) for Modern Pathology. He attended medical school in India and completed pathology residency training at the All India Institute of Medical Sciences followed by a second pathology residency at SUNY Upstate Medical University (Syracuse, NY). After a pulmonary pathology fellowship at the Mayo Clinic (Rochester, MN), he was recruited back to Syracuse and stayed on as faculty for next 6 years, rising to the rank of tenured Associate Professor in 2011. In 2013, he joined the department of pathology at the Cleveland Clinic. His interests include granulomatous lung diseases (including infections), interstitial lung disease, smoking-related lung disease, and lung cancer. The pulmonary pathology service at Cleveland Clinic signs out 5000 cases a year and supports a large group of ILD pulmonologists and several thoracic surgeons. The lung transplant service is one of the busiest in the world.
Dr. Mukhopadhyay has authored more than 125 publications in indexed, peer-reviewed journals, including 48 first-authored papers. He is the author of a textbook on non-neoplastic lung pathology published by Cambridge University Press in 2016 and a textbook of thoracic pathology published by Innovative Science Press in 2023. His studies have been published in the American Journal of Surgical Pathology, American Journal of Clinical Pathology, Modern Pathology, Human Pathology, Archives of Pathology and Laboratory Medicine and Chest. In 2011, he was invited to join the faculty of the prestigious USCAP Long Course in Pulmonary Pathology. He has received several teaching awards, served on the abstract review committees of the USCAP and CAP for several years, moderated platform sessions at USCAP, and taught 3 USCAP Short Courses. Since 2016, he has pioneered the use of online platforms for teaching lung pathology globally, for which The Pathologist magazine named him to its “Power List” for 4 years in a row (2018-2021). In 2018, Dr. Mukhopadhyay first-authored a landmark study that led to FDA approval for whole slide imaging for primary diagnosis in surgical pathology in the United States. This was followed by two highly cited studies of the effects of vaping on the lung and autopsy findings in COVID-19 that generated intense interest in the national news media and online. In 2020, Dr. Mukhopadhyay was featured in a New York Timesvideo on COVID-19 and ARDS that has been viewed more than 2 million times.
Sean R. Williamson, MD is the Director of Genitourinary Pathology and Vice Chair of Education at the Cleveland Clinic Pathology and Laboratory Medicine Institute. He is also a Professor of Pathology in the Cleveland Clinic Lerner College of Medicine. Originally from Pittsburgh, Pennsylvania, he studied medicine at Temple University School of Medicine in Philadelphia, Pennsylvania, followed by residency and genitourinary pathology fellowship training at Indiana University School of Medicine, Indianapolis, Indiana. Prior to joining the Cleveland Clinic, he practiced in the Henry Ford Health System in the Detroit Metro area, where he was selected by the trainees as the Anatomic Pathology Teacher of the Year 4 times. He is currently Editor-in-Chief of the International Journal of Surgical Pathology, succeeding Dr. Cyril Fisher. He has contributed to more than 150 peer-reviewed journal articles and is co-author with Dr. Sara Wobker of a recently released textbook Atlas of Genitourinary Pathology: A Pattern Based Approach. He is a lead author for multiple sections (urinary bladder, kidney, and mesenchymal tumors) in the recent 5th edition of the World Health Organization Classification of tumors of the urinary system and is a coauthor of the 5th series AFIP text on tumors of the testis and paratesticular structures. He currently serves on the editorial boards of several journals, including Modern Pathology and Histopathology. His research is focused on diagnostic, prognostic, and staging challenges in surgical pathology, with emphasis on recognizing novel tumor histologic features that correlate with underlying molecular events and significance for patient outcome.
Dr. Steven Billings completed his pathology residency at Indiana University School of Medicine in Indianapolis. Following residency he completed a fellowship in soft tissue pathology with Dr. Sharon Weiss at Emory University and a dermatopathology fellowship with Dr. Antoinette Hood at Indiana University. Upon completion of his post graduate studies, he joined the faculty at Indiana University School of Medicine, where he practiced for several years. In 2007 he joined the faculty at the Cleveland Clinic where he served as co-director of the dermatopathology section for 15 years, staffs the soft tissue pathology service, and is a Professor of Pathology at the Cleveland Clinic Lerner College of Medicine.
His research interests are in dermatopathology and soft tissue pathology. He has authored over 200 peer-reviewed articles, numerous invited reviews, almost 100 book chapters, and edited/co-authored seven books. His on the editorial board of numerous journals and was a consensus committee member for WHO Classification of Skin Tumours in 2017. He has served numerous roles, including the Board of Directors, for both the American Society of Dermatopathology and the United States and Canadian Academy of Pathology, and is the current President-Elect for the United States and Canadian Academy of Pathology.
Scott Kilpatrick, MD is currently a Professor of Pathology, Medical Director, Anatomic Pathology, Cleveland Clinic Laboratories, and Subspecialty Director, Orthopaedic Pathology, at the Cleveland Clinic. He is a pathologist who specializes in bone and soft tissue, both neoplastic and non-neoplastic disease. Dr. Kilpatrick was raised in the south-eastern United States, more specifically the state of Georgia and the city of Atlanta. He obtained a B.S. Degree in Biology at the University of Georgia, Athens, Georgia, and his M.D. degree at the Medical College of Georgia in Augusta. Following residency in Anatomic and Clinic Pathology at the Wake Forest University Baptist Medical Center, Winston-Salem, North Carolina, he completed a surgical pathology fellowship, specializing in Bone and Soft Tissue Pathology, at the Mayo Clinic, Rochester, Minnesota. Previous sites of employment have included both private practice and academic appointments, initially at Wake Forest University Baptist Medical Center, followed by the University of North Carolina, Chapel Hill, where he served as Director of Surgical Pathology. He joined the Cleveland Clinic in 2016. His research includes diseases of the skeleton and connective tissues, focusing predominantly on clinicopathological analyses, correlation of immunohistochemical, cytogenetic, and molecular findings, and the use of fine needle aspiration biopsy. Contributions to the literature encompass over 100 publications, book chapters including multiple contributions to the WHO Classification of Tumours, and a textbook, entitled Diagnostic Musculoskeletal Surgical Pathology. His recent literature contributions include topics related to Ewing sarcoma, a novel neoplasm “atypical sclerosing osteoblastic neoplasm”, the significance of calcium pyrophosphate dihydrate disease (pseudogout) in total joint resections, avascular necrosis with the necessity to pathologically evaluate femoral heads (hip arthroplasties), and clarifying the criteria for dedifferentiated liposarcoma.
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