Tuberculosis (TB): This is a common cause of bronchial ulceration, especially in endemic areas. TB can cause caseating granulomas that lead to ulceration and scarring in the bronchial tree.

Invasive Aspergillosis: This fungal infection can cause bronchial ulceration, particularly in immunocompromised patients. Aspergillosis can lead to the formation of necrotic lesions and ulcers in the bronchi.
Squamous Cell Carcinoma: This type of lung cancer can cause ulceration of the bronchus, especially if it arises from the bronchial epithelium. Squamous cell carcinoma is often associated with a history of smoking.
Broncholithiasis: This condition involves the erosion of a calcified lymph node or other structure into the bronchial tree, causing ulceration and potentially leading to hemoptysis.

Wegener's Granulomatosis (Granulomatosis with Polyangiitis): This autoimmune disorder can cause necrotizing granulomas in the bronchi, leading to ulceration. It is essential to consider this diagnosis due to its potential for severe morbidity and mortality if left untreated.
Lymphangitic Carcinomatosis: This condition involves the spread of cancer to the lymphatic vessels in the lungs, which can cause bronchial ulceration. It is crucial to identify this condition early, as it often signifies advanced disease.

Amyloidosis: This condition involves the deposition of amyloid proteins in various tissues, including the bronchi. Amyloidosis can cause bronchial ulceration, although this is a rare presentation.
Relapsing Polychondritis: This autoimmune disorder can cause inflammation and destruction of cartilaginous structures, including the bronchi. While rare, it can lead to bronchial ulceration and stenosis.
Papillomatosis: This condition involves the growth of benign tumors (papillomas) in the bronchi, which can cause ulceration. It is often associated with human papillomavirus (HPV) infection.