In most cases, a longitudinal and sagittal osteotomy is needed to centralize the bony parts of the ulnar thumb. While the soft-tissue of the radial thumb was preserved, it is now attached to the radial side of the ulnar thumb together with the periosteal sleeve. The APB and FPB of the ablated radial thumb are attached to the distal phalanx for more stability. If necessary, the extensor pollicis longus and the flexor pollicis longus are reattached to centralize their course.In Wassel type 5 and 6 the opponens pollicis muscle must be transferred to the ulnar metacarpal. Soft tissue with collateral ligament reconstruction is used to avoid any angular deformity in the preserved thumb. Tendon centralization is also often used for correction. Still, cases with osseous deformities may happen. To provide alignment, osteotomies are necessary to be done. This operation may need bone grafting, which is obtained from the amputated thumb. On top plasty procedure
This type is indicated when one thumb is larger proximally and the other thumb has a larger distal component. (The procedure is initially described as a way to lengthen amputated digits.) The goal is to create a functional thumb by combining less-hypoplastic components. On top plasty procedure is rarely employed in the treatment of congenital thumb duplication. It might be necessary for Wassel types 4, 5, 6.At the level of the mid-proximal phalanx or mid-metacarpal, the distal component is transferred to the proximal component. The tendons of the distal component are preserved as the rest of the distal component is amputated.
Etymology
Anisocoria is composed of prefix, root and suffix:

prefix: aniso- from the Greek language (meaning: unequal), which in turn comes from an: meaning not and iso: meaning equal
the root word: cor, from the Greek word "korē" meaning: pupil of the eye
-ia, which is a Latin suffix meaning: disease; pathological or abnormal conditionThus, anisocoria means the condition of unequal pupil(s). See also
Cycloplegia
Miosis
Mydriasis
Parinauds syndrome
Hippus

References
Further reading
"Anisocoria." "Stedmans Medical Dictionary, 27th ed." (2000). ISBN 0-683-40007-X
Victor, Maurice and Allan H. Ropper. "Adams and Victors Principles of Neurology, 7th ed." (2001). ISBN 0-07-067497-3


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