Which of the following is a potential presenting symptom of a deep vein thrombosis?

A deep vein thrombosis (DVT) may present with a variety of symptoms, and all the symptoms listed are indeed potential indicators of this condition.

Pain in the affected limb is commonly reported by patients, often described as a cramp or ache, particularly in the calf area. This pain can occur when the clot obstructs blood flow, leading to increased venous pressure.

Unilateral swelling of the leg is another significant presenting symptom. The obstruction caused by the clot leads to localized edema and an increased circumference in the affected limb compared to the other leg. This asymmetry is a classic sign that prompts further investigation.

Redness or discoloration of the skin over the affected area can also occur due to the inflammatory response and increased blood flow that often accompany thrombosis. This may manifest as a more intense color or a change in the temperature of the skin, enhancing the clinical picture.

Since all these symptoms can present in a case of DVT, the correct option encompasses the full range of potential indicators that healthcare providers consider when assessing a patient for this condition.