The combination (Kelley’s) syndrome refers to the destructive changes associated with the long term wear of a mandibular distal extension removable partial denture opposing a complete upper denture. Which of the following clinical findings is NOT normally characteristic of this syndrome?

Reduction in morphologic face height.

Advanced anterior maxillary ridge resorption.

Down growth of the maxillary tuberosities.

Advanced alveolar bone resorption under the posterior partial denture base areas.