**7. Associated conditions**

HS is a chronic inflammatory systemic disease. It may be associated with several other pathologies (**Table 2**) [21]. Metabolic syndrome affects at least 50% of patients with HS, with an increased cardiovascular risk [20, 23].

Some rheumatologic pathologies may also be related, such as pyogenic arthritis, spondyloarthritis, gangrenosum pyoderma, amyloidosis, and synovitis, acne, pustulosis, hyperostosis, and osteitis (SAPHO) syndrome [20–21].

Owing to chronic inflammation, patients with HS have an increased risk for malignancy, and squamous cell carcinoma is the worst complication [22].


#### **Table 2.**

*Associated disease to hidradenitis suppurativa.*

Psychiatric pathologies, such as depression, panic syndrome, and suicidal ideation, are also reported [21, 23].
