Case Reports

Case Report: Spontaneous Retroperitoneal Bleeding Masking as Left Lower Quadrant Abdominal Pain

A rare but serious condition, spontaneous retroperitoneal bleeding often presents with a variety of nonspecific symptoms, which in the absence of a high index of suspicion, can delay diagnosis and increase morbidity and mortality.

A rare but serious condition, spontaneous retroperitoneal bleeding often presents with a variety of nonspecific symptoms, which in the absence of a high index of suspicion, can delay diagnosis and increase morbidity and mortality.


 

References

Case

A 76-year-old woman with worsening intermittent lower left quadrant abdominal pain was brought to the ED by her daughter, who stated that her mother’s pain had started 2 days prior to presentation. The patient described the pain, which was present with movement and at rest, as sharp and radiating to the left hip, left lower back, and left inner thigh. She denied shortness of breath, chest pain, fever, chills, nausea, and vomiting. The patient initially reported having diarrhea, but further inquiry revealed that her stools had been softer than usual but not watery or more frequent.

One week before presentation, the patient had been treated at another hospital for myocardial infarction (MI) and new-onset atrial fibrillation. During this hospital stay, she had declined diagnostic cardiac catheterization and was started on warfarin and enoxaparin at discharge. Other than a history of hypertension, the patient had been in good health prior to the MI and atrial fibrillation. Her regular medications included metoprolol, lisinopril, and aspirin.

On physical examination, she was alert and oriented, but appeared to be in mild distress. The patient was an obese, elderly female with a body mass index of 35.2 kg/m2. Her vital signs were: temperature, 98.4˚F; blood pressure, 180/74 mm Hg; heart rate, 69 beats/minute; and respiratory rate, 18 breaths/minute. No respiratory distress was noted, and her oxygen saturation was 99% on room air.

The head, ears, eyes, nose, and throat examination was normal, with a normocephalic and atraumatic head. The patient’s neck was supple and without jugular vein distension or tracheal deviation. A cardiopulmonary examination revealed breath sounds with normal effort and no rales, wheezes, or rhonchi; no murmurs, rubs, or gallops were heard on auscultation. The patient’s abdomen was soft, without rebound tenderness, distention, or guarding, and bowel sounds were normal and appreciated on auscultation. She had tenderness to palpation in the left lower quadrant.

On musculoskeletal examination, the patient’s hips had normal range of motion and there was equal +5/5 strength bilaterally in the hips and lower extremities. The remainder of the examination of her lower extremities was without rash, erythema, or edema, and there were no lesions or rashes elsewhere on the skin. No focal deficits were noted on neurological examination.

Laboratory evaluation was significant for anemia with decreased hemoglobin (Hgb) from patient’s baseline; subtherapeutic international normalized ratio; and elevated partial prothrombin time and partial thromboplastin time. (The Table lists the patient’s complete laboratory results on admission to the ED.)
Computed tomography (CT) with oral and intravenous contrast was initially ordered, but the patient refused the oral contrast. Based on her body habitus, the decision was made to proceed with the CT scan without oral contrast. The CT of the abdomen and pelvis showed a small-to-moderate-sized retroperitoneal bleed; a 2.2-cm low-density lesion was also visualized in the left kidney. No diverticulitis or signs of inflammation were noted (Figure).

The patient was admitted to the hospital with a request for cardiology and surgical consultations. Upon inpatient admission and evaluation, the warfarin and enoxaparin were stopped, and the surgical team elected for conservative management of the retroperitoneal bleed. The patient had stable Hgb levels on serial complete blood-cell counts.

A renal ultrasound was ordered to investigate the low-density lesion in the left kidney revealed a left renal cyst. It is, however, unlikely the renal cyst was contributory to the retroperitoneal bleed. As the patient remained hemodynamically stable and her pain abated, she was discharged on hospital day 4.

Discussion

Overview

Spontaneous retroperitoneal bleeding is a rare but potentially life-threatening occurrence that is most commonly seen in patients on anticoagulation therapy, those with bleeding disorders, and those on hemodialysis.1 Patients with spontaneous retroperitoneal bleeding present with a variety of symptoms including abdominal pain, hip and upper thigh pain, back pain, and hypotension.2,3 In one observational cohort study, the nonspecific nature of symptoms led to misdiagnosis in 10.1% of the cases.3 The patient in this case exhibited several of the abovementioned symptoms and complaints.

The literature concerning spontaneous retroperitoneal bleeding is limited and consists of mainly case reports and case series. Warfarin, clopidogrel, unfractionated and low-molecular weight heparin use have all been reported in patients with retroperitoneal bleeding,4 and various studies have placed the incidence of this distinct entity to be between 0.6% to 6.6%.5,6

Spontaneous Versus Iatrogenic Retroperitoneal Bleeding

By definition, spontaneous retroperitoneal bleeding occurs without trauma, surgery, invasive procedures, and abdominal aortic aneurysm.3 Iatrogenic retroperitoneal bleeding, however, is a rare but known complication of catheterization procedures involving the femoral region, with an increased risk in female patients.7 Based on this increased incidence, the patient in this case was specifically asked whether she had undergone any procedures during her latest admission, including cardiac catheterization, which she denied.

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