Chronic urticaria associated with lung adenocarcinoma — a paraneoplastic manifestation: A case report and literature review

Table 5 Classification of paraneoplastic dermatoses: Adapted from Monestier and Richar (2018)

Type of PND	Characteristics
Real dermatoses	Basex paraneoplastic acrokeratosis, migratory necrolytic erythema, gyratum repens erythema, paraneoplastic pemphigus, florid cutaneous papillomatosis, palmar fasciitis and arthritis, acquired lacunar hypertrichosis.
Facultative dermatoses	Acquired ichthyosis, vasculitis, erythroderma, dermatomyositis, filiform hyperkeratosis, Sweet's syndrome, Pyoderma gangrenosum, pruritus, superficial migratory phlebitis.
Controversial dermatoses	Centrifugal annular erythema, Cutaneous vasculitis, necrobiotic xanthogranuloma, primary amyloidosis, scleroderma, porphyria cutanea tardis, bullous pemphigoid, linear IgA dermatitis, Raynaud's phenomenon, urticaria

PND: Paraneoplastic dermatoses.