Vintage retro sticker illustration of an opossum standing upright, wearing black sunglasses, holding a small espresso cup in its paw. Bold black linework with detailed fur texture using fine parallel lines and cross-hatching, long scaly tail curled at the bottom. Curved bold text "UNDIAGNOSED" arching over the top and "BUT SOMETHING AIN'T RIGHT" curving along the bottom. Cream/off-white background, clean black ink illustration, retro engraving aesthetic, die-cut sticker design.