Medical Image of the Week: Achalasia with Lung Abscess

Figure 1. CT coronal view showing a left lower lobe lung abscess measuring approximately 8 x 5 cm.

Figure 2. Barium swallow study showed dilated esophagus with tapering off at the lower esophageal sphincter junction, demonstrating the classic bird-beak like appearance.

Figure 3. Upper endoscopy showing diffuse whitish plaque suggestive of candidiasis likely due to chronic stasis of food.

An 80-year old woman with past medical history of high grade serous fallopian tube carcinoma presented with 2 months history of productive cough. This was associated with shortness of breath and subjective fever, chills and weight loss of 5 pounds over 2 months. She was treated with outpatient antibiotics without improvement of symptoms. Patient was afebrile on presentation, hemodynamically stable, and saturating at 99% on room air. Lung examinations revealed dullness on percussion of left lower lung field and reduced breath sounds on the same area.

Computed tomographic imaging revealed a large lung abscess on left lower lobe (Figure 1) and moderately dilated esophagus and fluid filled to the level of gastro-esophagus junction. Barium swallow study showed a classic bird-beak like appearance (Figure 2). There was no contrast that passed through the gastro-esophagus junction during the entire course of the barium study. Upper endoscopy was performed to rule out intraluminal pathology that may contribute to the obstruction which revealed a large amount of barium and retained food in the entire esophagus with diffuse whitish plaque suggestive of candidiasis and a benign appearing intrinsic mild stenosis at lower third of esophagus (Figure 3). Pneumatic dilation and botulinum toxin injection were performed and she was started on pantoprazole. She was also started on broad-spectrum antibiotics (vancomycin, cefepime, metronidazole) for the lung abscess. A chest tube was inserted under computed tomography (CT) guidance. Subsequently, cultures from the chest tube drainage grew Streptococcus intermedius. She was discharged to a skilled nursing facility with additional 3-weeks of ampicillin-sulbactam. Repeat imaging at 3-weeks showed improvement of the lung abscess.

Achalasia is a rare primary esophageal motor disorder, with incidence of approximately 1 in 100,000 people annually and prevalence of 10 in 100,000 (1). Common presentations of achalasia includes gradual dysphagia to solid and liquids, heartburn symptoms unrelieved by adequate proton pump inhibitor therapy and weight loss. Achalasia presenting with respiratory symptoms without dysphagia is rare as this disease entity is gradual and patient will normally present with different degrees of dysphagia or regurgitation of food. This case report is a good reminder that aspiration should be considered as a cause for pneumonia in the elderly. Our patient could have been aspirating for a period of time, leading to the development of a large lung abscess. Kikuchi et al. (2) demonstrated the high incidence of silent aspiration in the elderly population. A more detailed assessment by trained swallowing therapist may aid in detecting dysphagia.

Kai Rou Tey MD¹ and Naser Mahmoud MD²

¹Department of Internal Medicine University of Arizona College of Medicine- South Campus

²Department of Pulmonary, Critical Care, Allergy and Sleep, University of Arizona College of Medicine

Tucson, AZ USA

References

1. Francis DL, Katzka DA. Achalasia: update on the disease and its treatment. Gastroenterology. 2010 Aug;139(2):369-74. [CrossRef] [PubMed]
2. Kikuchi R, Watabe N, Konno T, Mishina N, Sekizawa K, Sasaki H. High incidence of silent aspiration in elderly patients with community-acquired pneumonia. Am J Respir Crit Care Med. 1994 Jul;150(1):251-3. [CrossRef] [PubMed]

Cite as: Tey KR, Mahmoud N. Medical image of the week: achalasia with lung abscess. Southwest J Pulm Crit Care. 2016 May;12(5):194-6. doi: http://dx.doi.org/10.13175/swjpcc025-16 PDF

Medical Image of the Week: Saddle Pulmonary Embolism

Figure 1. Thoracic axial computed tomography angiogram (CTA) demonstrating saddle embolism within bilateral pulmonary arteries with extension into sub-segmental branches.

Figure 2. Coronal CTA.

A 66-year-old woman with recent history of left knee surgery and L2-L5 spinal fusion within the past month presented to the Emergency Department (ED) with pleuritic chest pain and shortness of breath for three days. On admission, reported crushing diffuse substernal chest pain worsened to 10/10 on the pain scale on the day of presentation. In the ED, physical examination was remarkable for tachycardia, tachypnea, diaphoresis and hypotension. Initial electrocardiogram was significant for sinus tachycardia with S1Q3T3 pattern. thoracic computed tomography angiogram (CTA) showed saddle pulmonary embolus (PE) with extension into segmental vasculature, right greater than left (Figures 1 and 2). A bedside echocardiogram demonstrated diastolic and systolic bowing of the intraventricular septum into the left ventricle. An emergent trans-thoracic echocardiogram confirmed flattened septum consistent with right ventricle pressure overload with right ventricular systolic pressure of 55 mmHg + central venous pressure (CVP) and reduced left ventricular ejection fraction of 38%. Her hemodynamic condition was stabilized by administering intravenous norepinephrine infusion. Interventional radiology was contacted for an emergent catheter directed thrombolysis. Ten milligrams of tissue plasminogen activator (tPA) was injected into the pulmonary artery with subsequent removable inferior vena cava filter placement. Vasoactive medications were titrated down and stopped four hours following tPA administration and anticoagulation with intravenous heparin was commenced. The patient was discharged from the hospital after initiation of rivaroxaban.

Saddle pulmonary embolism (SPE) is a form of large pulmonary thromboembolism that straddles the main pulmonary arterial branch at the bifurcation. The incidence of SPE is found in about 2.6% of the PE cases (1). The choice of diagnostic testing for PE is CTA based on multiple studies demonstrating CTA was both sensitive and specific for PE especially in moderate to high clinical probability PE (2,3). Suspicion for PE in our patient included sedentary status following knee replacement surgery, tachycardia, S1Q3T3 pattern on EKG, evidence for right ventricular strain on echocardiography, and no other diagnosis more likely thus lead to high clinical suspicion of pulmonary embolism with a Well’s score for PE of 6.

Faraz Jaffer, MD¹ See Wei Low, MD¹ and Sairam Parthasarathy, MD²

¹Department of Internal Medicine, Banner - University Medical Center

²Department of Allergy, Pulmonary, Critical Care and Sleep Medicine

Banner-University Medical Center

Tucson, AZ USA

References

1. Ryu JH, Pellikka PA, Froehling DA, Peters SG, Aughenbaugh GL. Saddle pulmonary embolism diagnosed by CT angiography: frequency, clinical features and outcome. Respir Med. 2007 Jul;101(7):1537-42. [CrossRef] [PubMed]
2. Van Belle A, Büller HR, Huisman MV, et al. Effectiveness of managing suspected pulmonary embolism using an algorithm combining clinical probability, D-dimer testing, and computed tomography. JAMA. 2006 Jan 11;295(2):172-9. [CrossRef] [PubMed]
3. Stein PD, Fowler SE, Goodman LR, et al. Multidetector computed tomography for acute pulmonary embolism. N Engl J Med. 2006 Jun 1;354(22):2317-27. [CrossRef] [PubMed] 

Cite as: Jaffer F, Low SW, Parthasarathy S. Medical image of the week: saddle pulmonary embolism. Southwest J Pulm Crit Care. 2016 May;12(5):192-3. doi: http://dx.doi.org/10.13175/swjpcc024-16 PDF