The Collection (Hideshi Hino)

This tongue-in-cheek semi-autobiography follows the absurdly gruesome adventures of a lonely boy and his singularly crazed family. His escape from the madness that surrounds him is his collection of pickled animal and human body parts, to which he adds as one family member after another meet with a grotesque and sometimes terrifyingly funny death... (Source: AniList)

Note: there were 37 total chapters published in the magazine, only 16 got collected. It ended in January 1998.