Differential Diagnosis for Left Lateral Thigh Pain
Single Most Likely Diagnosis
- Meralgia Paresthetica: This condition is characterized by pain, numbness, or tingling in the outer part of the thigh due to compression of the lateral femoral cutaneous nerve. The symptoms typically worsen with standing or walking and improve with sitting, which aligns with the patient's presentation.
Other Likely Diagnoses
- Trochanteric Bursitis: Although the patient does not have redness or swelling, and pain with palpation is absent, trochanteric bursitis can sometimes present with pain in the lateral thigh area, especially when standing or lying on the side. The absence of these typical signs does not completely rule out this diagnosis.
- Gluteus Medius Tendinopathy: This condition can cause pain in the lateral thigh area, particularly when standing or climbing stairs. The pain is usually more pronounced with activities that involve hip abduction.
- Piriformis Syndrome: While more commonly associated with sciatica, piriformis syndrome can cause pain in the thigh, especially if the nerve compression affects the femoral branch. However, this would more likely involve the posterior thigh.
Do Not Miss Diagnoses
- Deep Vein Thrombosis (DVT): Although DVT typically presents with swelling, redness, and warmth of the affected limb, it can occasionally present atypically, especially in the early stages. Given the potential severity of DVT, it's crucial to consider it, even if the classic signs are not all present.
- Osteonecrosis of the Femoral Head: This condition can cause hip pain that may radiate to the thigh. Early stages might not have significant findings on physical examination, making it a "do not miss" diagnosis due to its serious implications for hip function.
Rare Diagnoses
- Neurogenic Tumors: Rarely, tumors affecting the nerves (like neurofibromas or schwannomas) can cause localized pain and sensory changes. These would be unusual causes of thigh pain without other neurological deficits.
- Chronic Compartment Syndrome: This condition is more common in the lower leg but can occur in the thigh. It typically presents with activity-related pain that is relieved by rest, but it's less likely given the specific location and nature of the pain described.