The condition probably gave her a humped posture which may have scared the community. She was seen as a threat even after death.
The main, dismembered and decapitated, was also suspected to have had kyphosis.
The third skeleton, a male about 30-35 years of age, was buried with the head trapped between two stones. A hole into the spine showed an attempt to stake him to the ground.
"His bones look quite 'normal', without signs of diseases," Socha said.
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The practice of placing stones in the grave is indicative of deviant burials. Individuals believed to be vampires were often buried with a brick in the mouth, nailed or staked to the ground, and sometimes decapitated and dismembered.
The skeletons are now being studied by anthropologists. Results will be published as soon as the investigation is over, Socha said.
Photo: A man buried with the head wedged between two stones. Credit: Krzysztof Socha WATCH: Which Diseases Influenced The Idea of Monsters?