<prompt> A patient presents with heaviness of leg with veins of diameter less than 1mm over the posterior pa of the calf- Under CEAP classification it comes underC0C1C2C3  <response>: CEAP Classification: - Clinical Classification: - C0- No signs of Venous Disease C1- Telangiectasia 1mm Diameter Reticular Veins 1-2.9 mm Diameter C2- Varicose Vein 3 mm Diameter C3- Oedema C4- Pigmentation, Eczema, Lipodermatosclerosis C5- Healed Venous Ulcer C6- Active Venous Ulcer Add S for Symptomatic and A for Asymptomatic cases Etiological Classification: - Ec- Congenital Ep- Primary Es- Secondary En- No Venous Cause identified Anatomical Classification: - As- Superficial veins Ap- Perforator veins Ad- Deep Veins An- No venous Location identified Pathological classification: - Pr- Reflux Po- Obstruction Pr, o- Reflux and Obstruction Pn- No Venous Pathology identifiable Ref:- Surgery Sixer 3rd Edition; Pg num:- 885 