Table 7.

Classification of post-operative seroma after ventral hernia repair [24]

Type of seroma	Definition	Clinical significance
0	No clinical seroma	No clinical seroma
I	Clinical seroma lasting < 1 month	Incident
II	Clinical seroma lasting > 1 month
III	Symptomatic seroma that may need medical treatment: minor seroma-related complications	Complication
IV	Seroma that need to be treated: major seroma-related complications

Clinical seroma: Those seromas detected during physical examination of patients which do not cause any problem, or just a minimum discomfort that allows normal activity

Minor complication: Important discomfort which does not allow normal activity to the patient, pain, superfitial infection with cellulitis, aesthetic complaints of the patient due to seroma or seroma lasting more than 6 months

Major complication: Infection, recurrence, mesh rejection or need to be punctured