Holden's Line
A horizontal anatomical landmark, roughly 8 cm lateral to the pubic tubercle, marking the firm attachment of the deep membranous layer of superficial fascia (Scarpa’s fascia) to the deep fascia of the thigh (fascia lata). It indicates the surface projection of the hip joint capsule and acts as a barrier, preventing superficial, extravasated urine from the abdomen from entering the thigh.