This cyst was on my patients knee for over 20 years. He had a large dilated pore (DPOW) and the bump underneath just kept getting bigger over the years and now was starting to become tender. Interesting flattened cyst over underlying bone and cartilage. Big squeeze elicited very dry large corn flake like cyst particles. Patient was happy to have cyst removed and we thank him for sharing his procedure! Cyst pop. DPOW. Dry cyst particles. Cyst excision. Dermatology procedure. Dermatology Physician Assistant. MrPopZit.