Quote: "Hey! How many acromegalic movies can we come up with? All the Rondo Hattons, Tarantula, Doomwatch, The Monster Maker... any others?"

Yes - you must add the Argentinian movie "Una luz en la ventana" (litt. "A Light at the Window"), directed by Manuel Romero. The great Narciso Ibanez Menta plays Dr. Herman, who lives as a hidden recluse in a house in the woods, being affected by acromegaly. As it was filmed in 1942, it could be the very first horror movie dealing with the subject.