Cytologic examination may aid in the diagnosis of
1. Herpes simplex.
2. Recurrent aphthae.
3. Pemphigus vulgaris.
4. Erosive lichen planus.
5. Carcinoma in situ.

(2) (3) (4)

(1) (4) (5)

(1) (3) (5)

(1) (3) (4)