<prompt> Oral examination is done in case of:Peutz jegher syndromePsoriasisBeri-beriPlummer vinson syndrome  <response>: A i.e. Peutz jegher syndrome Mucosal involvement is seen in: requiring oral examination Lichen planusQ, Leprosy Pemphigus vulgaris not pemphigoidQ Peutz Jegher Syndromes Erythema multiformae Syphilis congenital secondary Measles Koplik SpotQ Fordyces spot disease Peutz jegher syndrome consists of: Melanosis Brown macules on oral mucosa, perioral region, lips fingersQ Familial hamaomatous polyposisQ affecting the jejunum which leads to haemorrhage intussusception. 