What does the pneumonic CAB stand for in relation to conditions causing telangiectasia?

The pneumonic CAB in the context of conditions causing telangiectasia refers specifically to Coats disease, Acne rosacea, and Basal cell carcinoma. Each of these conditions is associated with the presence of telangiectasia, which are small, dilated blood vessels that appear near the surface of the skin, often giving a red or purplish appearance.

Coats disease is a congenital retinal vascular disorder that can lead to retinal abnormalities, including telangiectatic changes. Acne rosacea is a chronic skin condition that primarily affects the face and is characterized by facial erythema, flushing, and prominent telangiectasia, making the blood vessels more visible. Basal cell carcinoma, one of the most common forms of skin cancer, can also exhibit telangiectasia as a clinical sign, particularly in its nodular form.

In summary, the correct answer captures conditions that are clinically significant in the context of telangiectasia, illustrating their relationship with vascular changes in the skin and other tissues.