Basket Case (1982)
The tenant in room 7 is very small, very twisted and very mad.
Duane Bradley has a secret in his wicker basket, which he carries with him constantly. Inside is his mutant Siamese twin Belial, who was cut from his side as a child and left for dead. Now the two, who share a telepathic link, have travelled to New York City to wreak bloody revenge on the thoughtless surgeons who separated them. Belial is not about to let anything get in his was, least of all the budding romance between his brother Duane and a beautiful young receptionist.