Rhinitiss sicca involves
Rhinitis sicca is a crust-forming disease seen in patients who work in hot, dry and dusty surroundings, e.g. bakers, iron- and goldsmiths.Condition is confined to the anterior third of nose paicularly of the nasal septum. Here, the ciliated columnar epithelium undergoes squamous metaplasia with atrophy of seromucinous glands. Crusts form on the anterior pa of septum and their removal causes ulceration and epistaxis, and may lead to septal perforation.Dhingra 6e pg: 155
Anterior nares
Septum
Posterior wall
Lateral wall
Nose and paranasal sinuses