A malignant acrospiroma is a sweat gland carcinoma of the hand, which may recur locally in 50% of patients after excision, with distant metastases occurring in 60% of patients. See also
Acrospiroma
Syringoma
Hidrocystoma
List of cutaneous conditions

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The difference in magnification can also be eliminated by a combination of contact lenses and glasses (creating a weak telescope system). The optimum design solution will depend on different parameters like cost, cosmetic implications, and if the patient can tolerate wearing a contact lens.For reducing aniseikonia, similar to contact lens correction, optical image size difference will be reduced in refractive surgeries also.Aniseikonia due to uniocular aphakia is best corrected surgically by intraocular lens implantation. Similarly retinal aniseikonia is corrected by treating causative retinal disease.Note however that before the optics can be designed, first the aniseikonia should be measured. When the image disparity is astigmatic (cylindrical) and not uniform, images can appear wider, taller, or diagonally different. When the disparity appears to vary across the visual field (field-dependent aniseikonia), as may be the case with an epiretinal membrane or retinal detachment, the aniseikonia cannot fully be corrected with traditional optical techniques like standard corrective lenses. However, partial correction often improves the patients vision comfort significantly. Etymology
The word "aniseikonia" is derived from the following Greek morphemes:

"an" = "not" (as in "anæmia");
"is(o)" = "equal"  (as in "isobar");
"eikōn" = "image" (as in "icon").