Final answer:
Pruritus, or itching, is a common presenting clinical sign in dermatology due to various skin conditions. The exact proportion of dermatological consultations in which pruritus is observed is not provided in the given information.
Step-by-step explanation:
The prevalence of pruritus, which is the medical term for itching, in dermatological consultations can vary depending on the specific population being studied. In general, pruritus is a common presenting clinical sign in dermatology, as it can be a symptom of various skin disorders and conditions.
Based on the provided information, it is difficult to determine the exact proportion of dermatological consultations in which pruritus is a presenting sign. However, it can be inferred that pruritus is commonly observed since various skin conditions such as eczema, dermatitis, and hives are mentioned as common disorders.
To obtain a more accurate estimate of the prevalence of pruritus in dermatological consultations, specific studies and data focused on this aspect would be required.