Damage to the left angular gyrus is known to cause computational difficulties like those associated with primary<unk>  and anarithmetia. However, damage to various but not necessarily identified areas of the brain can cause computational difficulties, as various cognitive functions are necessary to execute mathematical calculations.
Acalculia
Dyscalculia
Genital wart
Acral nevus
Hypertrichosis cubiti
Hyperthecosis
Generalized lentiginosis
Tuberous breasts