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Wrist and Hand Normal Variants and Imaging Pitfalls
Julia R. Crim, MD
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Bony Variants

  • Type II Lunate

    • Carpal Coalitions (Uncommon)

      • Accessory Centers of Ossification

        • Pseudoerosions

          • Sesamoids

            • Bipartite Lunate

              • Duplication of Digits

                Tendon and Muscle Variants

                • Imaging Pitfall

                  • Accessory Abductor Digiti Minimi (24%)

                    • Proximal Origin of Lumbricals (22%)

                      • Extensor Digitorum Manus Brevis (1-3%)

                        • Palmaris Longus Variants

                          • Digastric Flexor Digitorum Superficialis of 2nd Digit

                            Neurovascular Variants

                            • Persistent Median Artery

                              • Median Nerve Variants

                                • Superficial Palmar Arterial Arch

                                  Selected References

                                  1. Burnett SE: Hamate-pisiform coalition: morphology, clinical significance, and a simplified classification scheme for carpal coalition. Clin Anat. 24(2):188-96, 2011
                                  2. Loukas M et al: Anatomical variations of the superficial and deep palmar arches. Folia Morphol (Warsz). 64(2):78-83, 2005
                                  3. Carlson DH: Coalition of the carpal bones. Skeletal Radiol. 7(2):125-7, 1981
                                  Related Anatomy
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                                  Related Differential Diagnoses
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                                  References
                                  Tables

                                  Tables

                                  Bony Variants

                                  • Type II Lunate

                                    • Carpal Coalitions (Uncommon)

                                      • Accessory Centers of Ossification

                                        • Pseudoerosions

                                          • Sesamoids

                                            • Bipartite Lunate

                                              • Duplication of Digits

                                                Tendon and Muscle Variants

                                                • Imaging Pitfall

                                                  • Accessory Abductor Digiti Minimi (24%)

                                                    • Proximal Origin of Lumbricals (22%)

                                                      • Extensor Digitorum Manus Brevis (1-3%)

                                                        • Palmaris Longus Variants

                                                          • Digastric Flexor Digitorum Superficialis of 2nd Digit

                                                            Neurovascular Variants

                                                            • Persistent Median Artery

                                                              • Median Nerve Variants

                                                                • Superficial Palmar Arterial Arch

                                                                  Selected References

                                                                  1. Burnett SE: Hamate-pisiform coalition: morphology, clinical significance, and a simplified classification scheme for carpal coalition. Clin Anat. 24(2):188-96, 2011
                                                                  2. Loukas M et al: Anatomical variations of the superficial and deep palmar arches. Folia Morphol (Warsz). 64(2):78-83, 2005
                                                                  3. Carlson DH: Coalition of the carpal bones. Skeletal Radiol. 7(2):125-7, 1981