**5. Comorbidities**

In cross-sectional studies, pemphigus is associated with some diseases including psoriasis, hematological and solid organ malignancies (esophageal and laryngeal cancer), other autoimmune diseases (Sjögren's syndrome, systemic lupus erythematosus and alopecia areata), and neurological diseases (dementia, Parkinson's disease and epilepsy), Crohn disease and ulcerative colitis. Studies on the comorbidities of PV are needed.
