Flaccid bullae lesions with oral mucosal lesions. The finding in immunoflourescence is –
Flaccid bullae with involvement of oral mucosa suggest the diagnosis of pemphigus vulgaris.
In pamphigus, there is intercellular deposition of IgG in fish-net pattern.
Fish net IgG in epidermis
Linear IgG in DEJ
Granular IgA in dermal papillae
Linear IgA in reticular dermis