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Journal of Clinical Medicine Research

Case Report

Volume 9, Number 11, November 2017, pages 958-961

Adult-Onset Henoch-Schonlein Purpura Duodenitis

Henoch-Schonlein purpura (HSP) is a systemic, small and medium sized vessel vasculitis that commonly affects children. Its occurrence in adults is unusual and estimated to be 13 per million population. The clinical presentation of HSP involves cutaneous palpable purpura, arthralgia/arthritis, bowel angina, and hematuria/proteinuria [1]. HSP with gastrointestinal (GI) involvement varies from mild symptoms to severe and life-threatening complications such as perforation, acute mesenteric ischemia, and bowel infarction [2, 3]. GI manifestations of HSP occur in about 85% of cases [4]. HSP affects the small intestines with preference for the second portion of the duodenum [5]. The triggers are infections, medications, vaccines and malignancies, although causality remains unproven [6, 7]. HSP in adults is estimated to occur in 3.4 - 14.3 cases per million [8], a 20-fold fewer cases than in children. We report a rare case of adult-onset HSP presenting as GI bleeding and review the recent literature on this uncommon clinical entity.

A 28-year-old female with medical history of chronic back pain, tendonitis and joint pains presented with two episodes of hematemesis, worsening abdominal pain, and bloody diarrhea. Additionally, the patient had arthralgia in her hands, wrists, and right knee. She reported daily use of non-steroidal anti-inflammatory drugs for chronic back pain. Abdominal pain was diffuse, “cramping” in quality, intermittent, and radiated to the back. She reported passing a small amount of blood mixed with loose stool the morning of admission. She also noted an erythematous, non-pruritic rash on her lower legs. She denied fevers, sore throat, red or painful eyes, or prior bleeding episodes.

Physical examination revealed diffuse abdominal tenderness, no rebound tenderness, and no rigidity. Rectal exam revealed a small amount of blood mixed with scant yellowish stool. An erythematous palpable purpuric rash was observed on her thighs and lower legs (Fig. 1a). Abnormal blood tests included an elevated white cell count of 13,700/mm³, C-reactive protein (CRP) of 27.78 mg/L, and D-dimer of > 35.2 mg/L (FEU), and complete blood count, comprehensive metabolic panel, coagulation profile, and urinalysis were normal.

Click for large image

Figure 1. (a) Erythematous papules and palpable purpura on the lower extremities. (b) Diffuse erythematous, hemorrhagic, friable mucosa with superficial thick adherent white exudate seen in the second portion of the duodenum. (c) CT scan showed thickening of the duodenal wall representing duodenitis.

Upper GI endoscopy revealed mild gastric erythema and diffuse erythematous, hemorrhagic, friable mucosa with superficial, thick, adherent white exudate seen in the second portion of the duodenum (Fig. 1b). Gastric and duodenal biopsies revealed mild reactive gastropathy (negative for Helicobacter pylori) and acute duodenitis, respectively. Contrast-enhanced computed tomography (CT) scan showed thickening of the duodenal wall (Fig. 1c). The patient was treated with proton pump inhibitor therapy and her abdominal pain resolved with no further bleeding episodes. She was subsequently discharged after 3 days.

Giant cell arteritis is the most common type of vasculitis in adults. HSP is the most common vasculitis in the pediatric population. In children less than 17 years of age, the incidence of HSP is 20/100,000 with a minor male predilection (M/F = 1.2/1.0). The peak age of incidence occurs between 4 and 6 years with the majority (90%) of cases occurring before the age of 10 years. Globally, HSP commonly affects Asians, while in the United States, Caucasians have the highest incidence rate. In adults, the incidence of HSP is very rare (13/million) [8, 9]. HSP is most commonly reported during late autumn to early spring seasons, though it can occur at any time [10].

In 2010, the European League Against Rheumatism/Pediatric Rheumatology International Trials Organization/Pediatric Rheumatology European Society proposed validated classification criteria for diagnosing HSP, among other vasculitis including childhood polyarteritis nodosa (c-PAN), c-Wegener granulomatosis (c-WG) and c-Takayasu arteritis (c-TA) [11]. A patient was classified as HSP in the presence of purpura or petechiae (mandatory) with lower limb predominance plus one of four criteria: 1) abdominal pain; 2) histopathology (immunoglobulin A (IgA)); 3) arthritis or arthralgia; and 4) renal involvement. Our patient presented with palpable purpura, worsening abdominal pain, and arthralgia which fulfilled the diagnostic criteria for HSP.

HSP is an autoimmune disorder characterized by the deposition of IgA immune complexes in the walls of small to medium sized arteries [11]. Concomitantly vascular necrosis leads to extravasation of erythrocytes, infiltration of tissues with neutrophils, and deposition of degenerating neutrophil fragments called leukocytoclastic vasculitis (LCV). The extravasation of blood leads to the pathognomonic purpura of the skin, while inflammation and edema leads to swelling which is usually palpable [12]. Palpable purpura in the absence of thrombocytopenia is typically suggestive of HSP as it is found in almost all patients [10]. Purpura is usually noted in the legs and areas under pressure such as the buttocks. Other symptoms of HSP include abdominal pain and arthritis, though not universally present [5]. Renal involvement occurs in 32-54% of patients, and in most instances, it manifests as hematuria [13]. These patients are at increased risk for chronic renal failure, and should be monitored with weekly urinalysis throughout the disease process [14].

HSP immune complex formation can be triggered by infectious antigens, medications, tumors, or other environmental factors. Upper respiratory tract infections have been reported to occur in 35-52% of patients [15]. Group A streptococcus cultures have been found positive in more than 30% of children with Henoch-Schonlein nephritis, and positive serum antistreptolysin-O titers [16]. Other suspected viral and bacterial activators include parvovirus B19, Bartonella henselae, Helicobacter pylori, Haemophilus parainfluenza, Coxsackie virus, adenovirus, hepatitis A and B viruses, mycoplasma, Epstein-Barr virus, varicella, campylobacter, and methicillin-resistant Staphylococcus aureus [17-20].

HSP with GI involvement varies from mild to severe and life-threatening complications. The small intestinal epithelial villi are most commonly affected due to the presence of end capillaries, making it susceptible to ischemic injury. Usually, skin manifestations precede GI manifestations, but in one-fourth of cases, skin lesions occur after GI manifestations. Abdominal pain, which is colicky and worse with food, is the most common GI symptom occurring in 60-65% of patients [14]. Vomiting and GI bleeding develop in about 30% of patients [21]. Rarely, intussusception (ileoleal), ischemic necrosis of the bowel wall, intestinal perforation, acute acalculous cholecystitis, hemorrhagic ascites with serositis, pancreatitis, and biliary cirrhosis may occur [21-25].

Endoscopic findings reflective of HSP include erythema, swelling, petechiae, erosions, ulcers, purpura, and submucosal hemorrhage [26]. Patients can also present with duodenitis, where the second portion of the duodenum is most commonly involved. Ulcers are commonly seen in the rectum and ileum where it is most severe. Isolated cases have described the effect of HSP on the colon as multiple petechiae either grouped along the longitudinal striae of the colon or dispersed randomly. In contrast to the duodenum, there does not appear to be any characteristic site of involvement in the colon [27, 28]. When HSP of the GI tract is suspected, and where all typical investigative modalities are negative, capsule endoscopy may aid in surveillance and diagnosis [29]. Since upper endoscopy was able to identify hemorrhagic small bowel mucosa, capsule endoscopy was not indicated. Enteroscopy may be used to investigate the jejunum if the duodenum is normal [30]. Furthermore, endoscopic ultrasound (EUS) may show mucosal and submucosal thickening without affecting the muscularis layer [31]. CT scan may also show thickening of the bowel walls, as seen in our patient.

HSP is a self-limiting disease, where treatment is mainly supportive [14]. The use of non-steroidal anti-inflammatory drugs (NSAIDs) is effective in relieving arthritic symptoms, and abdominal pain. However, in cases of concurrent GI ulcers, NSAIDs may exacerbate this condition. Glucocorticoids and other steroids have been successfully used to treat HSP by alleviating abdominal pain and decreasing the likelihood of intussusception [32, 33]. However, glucocorticoids have not been shown to decrease the renal complications associated with HSP [34].

HSP most commonly affects the pediatric population and rarely affects adults. Clinicians should be aware of the clinical presentation of HSP, and its triggers in order to rapidly diagnose and treat affected patients. We suspected HSP in our patient due to the presence of palpable purpura, diffuse abdominal pain with GI bleeding, and arthralgia. Secondly, HSP had a predominant effect on the small bowel, particularly in the second portion of the duodenum with characteristic endoscopic findings of diffuse erythema, and hemorrhagic and friable mucosa. Fortunately, our patient recovered with supportive treatment, and had a favorable clinical outcome.

Author Contributions

Conception and design: Emmanuel Ofori, Daryl Ramai, Mel A. Ona, Charilaos Papafragkakis, and Madhavi Reddy. Drafting of the article: Emmanuel Ofori, Daryl Ramai, Mel A. Ona, Charilaos Papafragkakis, and Madhavi Reddy. Critical revision of the article for important intellectual content: Emmanuel Ofori, Daryl Ramai, and Madhavi Reddy. Final approval of the article: Emmanuel Ofori, Daryl Ramai, Mel A. Ona, Charilaos Papafragkakis, and Madhavi Reddy.

Funding

None.

Conflict of Interest

None.

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