Gastroenterology · Abdominal Wall Hernias
The facts most likely to be tested
Femoral hernias protrude through the femoral canal, located inferior to the inguinal ligament and medial to the femoral vein.
Femoral hernias have the highest risk of incarceration and strangulation among all groin hernias due to the narrow, rigid borders of the femoral ring.
The classic patient demographic for a femoral hernia is an elderly multiparous woman.
Physical examination typically reveals a bulge below the inguinal crease that is often misdiagnosed as a lymph node or lipoma.
Femoral hernias are more common on the right side due to the anatomical position of the sigmoid colon on the left.
Surgical repair is the definitive treatment for all femoral hernias, regardless of size or symptoms, due to the high risk of complications.
The femoral ring is bounded medially by the lacunar ligament, which is the most common site of constriction in a strangulated femoral hernia.
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A 72-year-old female presents to the emergency department with a 12-hour history of severe, constant right-sided groin pain and nausea. Physical examination reveals a tender, non-reducible mass located inferior to the inguinal ligament and lateral to the pubic tubercle. The patient has no history of prior abdominal surgeries. Bowel sounds are hypoactive, and the skin overlying the mass is erythematous.
What is the most appropriate next step in management?
Urgent surgical consultation for hernia repair
The patient presents with signs of a strangulated femoral hernia, which is a surgical emergency due to the high risk of bowel ischemia and necrosis associated with the narrow femoral ring.
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Etiology / Epidemiology
Predominantly affects elderly women due to wider pelvic anatomy. High risk of incarceration and strangulation.
Clinical Manifestations
Presents as a mass below the inguinal ligament; often presents as an acute surgical emergency.
Diagnosis
Surgical exploration is the gold standard; CT scan is the diagnostic imaging of choice.
Treatment
Surgical repair is mandatory; do not attempt manual reduction if strangulated.
Prognosis
High rate of strangulation (40%); requires prompt surgical intervention to prevent bowel necrosis.
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Epidemiology & Etiology
Femoral hernias are significantly more common in women than men due to the wider female pelvis. While less common than inguinal hernias, they carry a much higher risk of complications. They are rare in children and typically present in the elderly population.
Pertinent Anatomy
The hernia sac protrudes through the femoral canal, located medial to the femoral vein and inferior to the inguinal ligament. The narrow, rigid borders of the canal are responsible for the high rate of incarceration.
Pathophysiology
Increased intra-abdominal pressure forces abdominal contents into the narrow femoral ring. Because the ring is non-distensible, the contents quickly become strangulated. This leads to rapid ischemia and potential bowel necrosis if not addressed.
Clinical Manifestations
Patients typically present with a mass below the inguinal ligament and lateral to the pubic tubercle. Presentation is frequently an acute surgical emergency with signs of bowel obstruction. Red flags include severe pain, overlying skin erythema, and systemic signs of sepsis.
Diagnosis
Diagnosis is often clinical, but CT scan is the preferred imaging modality to confirm the diagnosis and assess for strangulation. Surgical exploration remains the definitive diagnostic and therapeutic gold standard. Avoid unnecessary delay in imaging if the patient is hemodynamically unstable.
Treatment
Surgical repair is the only definitive treatment. Manual reduction is contraindicated due to the high risk of reducing necrotic bowel into the abdomen. Mesh repair is typically utilized to reinforce the defect and prevent recurrence.
Prognosis
The prognosis is excellent if repaired before strangulation occurs. If bowel necrosis is present, the risk of morbidity and mortality increases significantly. Post-operative monitoring for ileus and wound infection is required.
Differential Diagnosis
Inguinal hernia: located superior to the inguinal ligament
Lymphadenopathy: usually multiple, firm, or tender nodes
Saphenous varix: compressible and disappears with elevation
Femoral artery aneurysm: pulsatile mass
Lipoma: soft, non-tender, and non-reducible