In Memoriam: Dr Delbert (Del) Arthur Fisher (1928–2026)

It was with deep sadness and a profound sense of loss that we received the news that Dr Delbert Arthur Fisher, born on 12 August 1928, passed away peacefully at his home in Solana Beach, California, on 4 March 2026 at the age of 97. He is now reunited with his beloved wife Beverly, who passed away in 2022.

Delbert attended the University of California, Berkeley, where he met his wife Beverly – his lifelong companion and partner. In 1960, he joined the Department of Pediatrics at the University of Arkansas, and in 1968 he was recruited to lead the Division of Pediatric Endocrinology and Metabolism at Harbor–UCLA Medical Center in Los Angeles. Under his leadership, the division became a place of inspiration and excellence, attracting trainees and collaborators from around the world. In 1991, he took on a new role as Head of Reference Laboratories at Nichols Institute (now Quest Diagnostics), where he later served as Vice President for Science and Innovation.

Delbert was a longstanding corresponding member of ESPE and his scientific contributions fundamentally shaped our understanding of thyroid function in the fetus and newborn. With clarity of thought and remarkable insight, he interpreted experimental findings in ways that changed clinical practice. His pioneering work in newborn screening for congenital hypothyroidism stands among his greatest achievements – transforming the lives of countless children by enabling early diagnosis and treatment and preventing intellectual disability on a global scale. He also gave generous amounts of his time and expertise to the scientific community, serving as Editor-in-Chief of leading journals such as The Journal of Clinical Endocrinology & Metabolism and Pediatric Research.

Most importantly, for many ESPE members Del’s greatest legacy lies in his role as a mentor. He welcomed fellows from all over the world into his department, creating not only a centre of scientific excellence, but also a home. He listened, encouraged, challenged, and supported – always with respect and genuine interest. Many of us were fortunate not only to learn from him, but to remain connected to him over decades, as colleagues and as friends. All who knew him will remember not only his intellect, but also his kindness, humility, and honesty.

His contributions to paediatric endocrinology, to medicine, and to generations of students and fellows will endure. But beyond all achievements, it is the person he was – the humanity he embodied – that will remain with us. We will remember him with deep gratitude, respect, and affection.