Grover's may be suspected by its appearance, but since it has such a characteristic appearance under the microscope a shave skin or punch biopsy is often performed.
Transient acantholytic dermatosis
Paraneoplastic acrokeratosis
Poikiloderma vasculare atrophicans
Congenital erosive and vesicular dermatosis
Linear IgA bullous dermatosis
Eosinophilic dermatosis
Dermatosis neglecta
Relapsing linear acantholytic dermatosis