Process of fixation in inflation with heated formalin vapor. A, Right upper lobe, resected from a 68-year-old man due to a 2 cm bronchoalveolar cell carcinoma, suspended by ventilation tubing within fixation chamber at the start of the fixation process. The front panel of the chamber has been removed. The fixation apparatus consists of a heating coil within a pool of 37% formalin inside the chamber, and an electronically-controlled ventilation circuit connected to a diaphragm pump, seen to the left of the chamber. B, Anterolateral surface view of the inflation-fixed lobe removed from the chamber after 10 hours of fixation. A 15 cm ruler is shown for scale. C, Medial surface view shows connection to bronchus and multiple glued patches of latex cut from medical gloves used to seal leaks in the pleural surface. S-superior aspect; P-posterior aspect; AM-anteromedial aspect; A-anterior aspect; MF-minor fissure surface.