Lupus Gastrointestinal Tract Vasculopathy: Lupus "Enteritis" Involving the Entire Gastrointestinal Tract from Esophagus to Rectum

Lupus enteritis: a narrative review

Lupus enteritis (LE) is a rare manifestation of systemic lupus erythematosus. The pathophysiology of LE has not been fully elucidated, although inflammatory and thrombotic processes are likely important factors. The underlying pathophysiological mechanisms may depend on which portion of the intestine is affected. Over half of the patients with LE also present with renal or haematological complications. The diagnosis of LE is based on clinical, histopathological and imaging findings; abdominal computed tomography (CT) is the gold standard in diagnosis. Abdominal CT can also identify factors that predict complications and could potentially guide pharmacological and nutritional management. Timely identification and prompt treatment initiation are paramount to avoid life and organ threatening complications. Glucocorticoids are often the first-line treatment. Additional therapy including immunosuppressive therapy is utilised on a case-by-case basis as there are no clinical trials to define the optimal therapeutic approach. Surgical intervention may be needed especially if there is bowel perforation or peritonitis. In general, the prognosis of LE is good.

Lupus Enteritis in the Absence of a Lupus Flare. A Case Report and Review of Literature

Lupus enteritis is a rare manifestation seen in systemic lupus erythematosus (SLE). Its diagnosis can be challenging as symptoms frequently overlap many gastrointestinal disorders, imaging findings are not specific, and endoscopic features are infrequently diagnostic. Moreover, enteritis can occur in isolation without other systemic manifestations or even elevated inflammatory markers.1 Here is presented the case of a 22-year-old female with known SLE manifested by lupus nephritis complicated by end-stage renal disease who presented with abdominal pain. She had leukocytosis with thickened bowel loops, ascites, "target sign", "comb sign" and patent abdominal vessels on CT imaging. The differential diagnoses considered ranged from infectious gastroenteritis to systemic vasculitis. Her infectious workup was negative while inflammatory markers and autoimmune workup did not support active lupus flare. Having ruled out alternative etiologies, steroid dosing was increased in consultation with rheumatology. Subsequently, her abdominal pain responded supporting a diagnosis of lupus enteritis. The case was perplexing in light of her non-specific presenting symptoms and the absence of laboratory evidence of active lupus flare which delayed the diagnosis. This case illustrates how the diagnosis of lupus enteritis continues to remain a challenge.

Dramatic Response of Lupus Enteritis, Nephritis, and Pancytopenia to Plasmapheresis and Rituximab

Background

Although lupus enteritis is a rare manifestation of systemic lupus erythematosus yet results in significant distress. This disorder contributes to diagnostic and therapeutic dilemma leading to enhanced mortality. Case Description. We report a case history of a 29-year-old female who presented with severe abdominal pain, watery stools, and vomiting, and later on, she developed pancytopenia and renal impairment. On intensive workup, diagnosis of lupus-associated enteritis, nephritis, and pancytopenia was discovered. She improved drastically on initiation of plasmapheresis followed by low-dose intravenous rituximab. One year posttreatment, she remained in complete remission.

Conclusion

From this case, it can be suggested that in a young female with intractable abdominal pain, the remote possibility of lupus enteritis must be kept in mind. Besides this, plasmapheresis can have a potential role in refractory lupus enteritis. Furthermore, low-dose intravenous rituximab can be a safe and cost-effective treatment option in achieving sustained remission of clinical and laboratory parameters in lupus enteritis.

Lupus Enteritis: An Uncommon Presentation of Lupus Flare

Gastrointestinal (GI) symptoms are common in systemic lupus erythematosus (SLE) but are usually attributable to medication side effects, infections, or other underlying conditions. In rare cases, they are caused by the autoimmune process itself. In this report, we present two cases of lupus enteritis as the sole manifestation of lupus flare. We also provide a comprehensive review of available literature on this topic with a specific focus on clinical symptoms, complications, laboratory findings, histology, imaging findings, and therapies. Lupus enteritis is an uncommon manifestation of SLE. CT scan of the abdomen is the diagnostic modality of choice. The three major CT findings are target sign, comb sign, and increased mesenteric fat attenuation. Ascites is also commonly present. Corticosteroids and second-line immunosuppressants have been successfully employed in the treatment of lupus enteritis. Our cases highlight this unusual manifestation as the only symptom of active SLE. A high index of suspicion should be maintained when evaluating SLE patients presenting with GI symptoms to prevent diagnosis and treatment delays that could lead to serious complications such as bowel necrosis, perforation, and even death.

Targets and Combs: A Case of Lupus Enteritis

Lupus is a common autoimmune disorder with the potential to affect all organ systems. Lupus enteritis is a rare complication that is seen in a subset of patients that present with gastrointestinal symptoms. Its diagnosis commonly involves imaging, showing bowel wall edema as the target sign and vascular engorgement of bowel vessels as the comb sign on CT scans. These findings can help guide the diagnosis, but they are nonspecific and are also found in other conditions that cause bowel wall ischemia. These symptoms are reversible if treated with immunosuppressants. Unfortunately, recurrence is common in lupus enteritis and perforation needs to be ruled out on presentation. In this report, we present the case of a patient with known lupus who was diagnosed with lupus enteritis on imaging and was treated with immunosuppressants. The patient's symptoms resolved subsequently. Our case highlights the fact that the appropriate diagnosis and management of this condition require physical exams, labs, and imaging.

A Flare-up of Systemic Lupus Erythematosus with Unusual Enteric Predominance

Enteritis associated with systemic lupus erythematosus (SLE) is a rare and unusual manifestation of the gastrointestinal (GI) consequences of SLE itself. Complications of the enteritis component include mesenteric vasculitis, intestinal pseudo-obstruction, and protein-losing enteropathy. Lupus enteritis is very responsive to treatment with pulse steroids in almost 70% of the patients, but it is critical to diagnose it early to prevent devastating organ damage.

The case describes a 21-year-old Caucasian female with a past medical history of uncomplicated laparoscopic appendectomy (one month prior to the time of presentation), major depressive disorder, asthma, iron deficiency anemia, pelvic inflammatory disease secondary to sexually transmitted Chlamydia trachomatis infection, and SLE (diagnosed two weeks prior to presentation). She had been transferred from an outside facility with complaints of severe right upper quadrant (RUQ) abdominal pain for one day. The patient had run out of her prescription for steroids and hydroxychloroquine two days prior to the presentation. Her abdominal pain was accompanied by nausea, bilious vomiting, non-bloody diarrhea, a photosensitive facial rash, left-sided pressure-type periorbital headache, diplopia, oral ulcers, inappetence, joint stiffness, and muscle weakness. A CT of the abdomen and pelvis from an outside facility showed enteritis involving the proximal jejunum with associated mesenteric edema and ascites, suggesting infectious versus inflammatory or autoimmune etiology. A repeat CT scan a few days later confirmed these findings along with adjacent mesenteric fat stranding. Her autoimmune workup confirmed the serological diagnosis of SLE, and assessment of the SLE Disease Activity Index (SLEDAI) confirmed the diagnosis of a severe SLE flare. Upper endoscopy detected edematous mucosa in the duodenum and jejunum without active bleeding, gastropathy, or ulceration. No surgical intervention was required. Her symptoms resolved with supportive care, pulse steroids, and hydroxychloroquine. She was discharged with instructions for outpatient follow-up with gastroenterology and rheumatology.