Subsets of vulvodynia: overlapping characteristics

To determine the characteristics of vulvar pain as to location and provocation by touch and pressure in order to confirm that current International Society for the Study of Vulvovaginal Disease definitions of vulvar vestibulitis (provoked vestibulodynia) and vulvodynia (generalized vulvodynia) effectively describe and differentiate these 2 subsets.

The charts of all women diagnosed with vulvodynia at their initial clinic visit between November 2002 and June 2003 were reviewed for this study. Each patient was evaluated by questionnaire, interview in person and by physical examination to ascertain the location and provoked vs. spontaneous nature of the pain as primary criteria for the differentiation of provoked vestibulodyniafrom generalized vulvodynia.

Sixty patients were included in the analysis. Four (6.7%) described provoked pain only in the vestibule (vulvar vestibulitis, provoked vestibulodynia), and 5 women (8.3%) experienced only unprovoked pain that was not confined to the vestibule (dysesthetic vulvodynia, unprovoked generalized vulvodynia). Other patients fell into patterns not specifically recognized or identified by a name. Sixteen (26.7%) experienced both provoked and unprovoked pain always limited to the vestibule, and 21 (35.0%) described provoked and unprovoked pain that extended beyond the vestibule at least occasionally. Six (10.0%) patients described only provoked pain primarily but not limited to the vestibule, and 8 patients each described a unique pattern.

This study suggests that the criteria of location and only provoked vs. only unprovoked pain alone do not describe 2 distinct subsets of vulvodynia; rather, there is overlap in provoked vs. unprovoked pain and location.