© 2006 the American Academy of Orthopaedic Surgeons The Hypoplastic ThumbDr. Tay is Hand Surgery Fellow, Mayo Clinic, Rochester, MN. Dr. Moran is Associate Professor, Division of Plastic and Reconstructive Surgery, Mayo Clinic. Dr. Shin is Professor, Department of Orthopedic Surgery, Mayo Clinic. Dr. Cooney is Professor, Department of Orthopedic Surgery, Mayo Clinic. None of the following authors or the departments with which they are affiliated has received anything of value from or owns stock in a commercial company or institution related directly or indirectly to the subject of this article: Dr. Tay, Dr. Moran, Dr. Shin, and Dr. Cooney. Reprint requests: Dr. Shin, Mayo Clinic, 200 First Street SW, Rochester, MN 55905. Thumb hypoplasia is part of a spectrum of radial longitudinal deficiencies involving the upper limb. Systemic involvement of other organ systems is not uncommon, thus requiring a team approach to management. Because of the variety of anatomic abnormalities associated with thumb hypoplasia, clinical and intraoperative evaluation of the thumb must be precise. Effective management of thumb hypoplasia requires an understanding of the embryology, epidemiology, classification, presentation, and management options. Management, which is primarily determined by the grade of thumb hypoplasia, may include nonsurgical techniques, reconstruction, pollicization, and, recently, microsurgical procedures.
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