BACKGROUND: Granulomatosis with polyangiitis (GPA), formerly termed Wegener\'s granulomatosis, is an autoimmune disease marked by necrotizing granulomatous inflammation and vasculitis affecting small-sized vessels. It commonly impacts the renal and respiratory systems.
METHODS: This retrospective case series sampling conducted in a tertiary care hospital between May 2023 and April 2024 examined six newly diagnosed GPA patients who were proteinase 3 cytoplasmic-antinuclear cytoplasmic antibody (PR3 c-ANCA) positive and had concurrent respiratory infections. None of them had any prior immunosuppressive conditions. The age range was 18-47 years with a mean of 35.0 (standard deviation: 11.83). All the patients had pneumonia (N=6, 100%). Out of all, five had bacterial pneumonia (N=5, 83.3%) and one had tuberculous pneumonia (N=1, 16.7%). A high level of PR3 c-ANCA (>150 RU/mL) was noted in four patients (N=4, 66.7%). Common symptoms included dry cough (N=5, 83.3%), loss of weight and appetite (N=2, 33.3%), and fever (N=2, 33.3%). Three patients had otitis media and/or nasal polyposis (N=3, 50%). Two patients (N=2, 33.3%) with life-threatening organ dysfunction were given concurrent antibiotics and steroids; the antibiotics were later modified based on culture and sensitivity results. One of these patients received antituberculosis therapy as Mycobacterium tuberculosis (MTB) was detected after 27 days of incubation in mycobacterial growth indicator tube broth. The remaining four patients (N=4, 66.7%) received antibiotics initially for 5-7 days until clinical resolution of pneumonia. Ultimately, they all showed clinical and radiological resolution (N=6, 100%) within 3-6 months of treatment.
RESULTS: The patients exhibited constitutional symptoms such as fever and weight loss; lower airway disease symptoms including dry cough and hemoptysis; nasal and ear disease symptoms like epistaxis, ear pain, and ear discharge; and a renal disease symptom, hematuria. Computed tomography of the thorax revealed bilateral consolidations, most of which were cavitating. Bronchoalveolar lavage cultures grew Escherichia coli, Burkholderia cepacia, Pseudomonas aeruginosa, Klebsiella pneumoniae, and MTB, whereas pus swab cultures from otitis media grew Pseudomonas aeruginosa, Staphylococcus aureus, and coagulase-negative staphylococci.
CONCLUSIONS: This study highlights the therapeutic challenges of GPA complicated by concurrent infections. Patients exhibited typical GPA signs, confirmed by PR3 c-ANCA levels. Concurrent infections require cautious antibiotic treatment before starting immunosuppressive therapy, except in life-threatening organ dysfunction. A unique case presented with both tuberculosis and GPA. Tailored treatment regimens combining antibiotics and immunosuppressives, including corticosteroids, methotrexate, and rituximab, resulted in clinical and radiological improvement in all the patients within 3-6 months. The addition of co-trimoxazole reduced the incidence of non-severe GPA relapses.
CONCLUSIONS: Tailored treatment plans addressing both infectious and autoimmune aspects are essential for optimal care in GPA complicated by concurrent infections. This study highlights the need for a multidisciplinary approach involving pulmonologist, rheumatologist, microbiologist, and pathologist in the diagnosis and treatment of GPA, emphasizing the importance of individualized treatment plans tailored to the specific clinical scenario.

Renal transplantation is undoubtedly an effective treatment for patients with end-stage renal disease, but it is certainly not a cure. Patients require lifelong immunosuppression to maintain optimal allograft function, and post-operative risk complications such as cancer in the transplant recipient cannot be ignored. Besides, infection is a silent complication that follows transplantation. Relatedly, herein, we present a report of a 40-year-old patient who underwent renal transplantation and promptly developed a diffuse large B-cell tumor in the liver and Aspergillus infection in the trachea. In addition, an inflammatory necrotizing granuloma was also observed in the muscles. Of importance, we also described the potential of 18F-FDG-PET/CT, which was instrumental in monitoring and evaluating these relevant post-operative complications in this rare case.

UNASSIGNED: The co-occurrence of Mycobacterium tuberculosis (MTB) affecting both the lungs and abdominal viscera is quite common, but instances of isolated Hepatic tuberculosis (TB) without concurrent clinical signs of TB are exceedingly rare.
METHODS: We present a case of a 55-year-old woman who complained of abdominal pain, weight loss, fever and changes in bowel habits. A definitive diagnosis of hepatic TB was made through microscopic examination, revealing necrotizing granulomatous inflammation accompanied by caseous necrosis. The patient received antitubercular therapy without experiencing any noticeable side effects during follow-up.
UNASSIGNED: Hepatic TB without active pulmonary TB is quite rare case. The patient presents with abdominal pain, fever, weight loss and jaundice. The diagnostic process includes CT (computerize tomography) imaging and subsequent biopsy to confirm it histopathologically. Following the same approach, we did biopsy from the targeted hepatic lesion that showed hepatic tuberculosis. In most cases it is treated with anti-tubercular drugs. However, some complicated cases might need surgical intervention.
CONCLUSIONS: This case report highlights the significance of considering TB into account as a potential cause in patients with lower gastrointestinal symptoms in TB endemic areas by emphasizing the diagnostic challenges posed by hepatic tuberculosis with isolated liver involvement. In order to prevent serious complications of abdominal TB, early diagnosis and timely treatment is crucial.

Granulomatosis with polyangiitis (GPA, Wegener\'s granulomatosis) presenting as rapidly progressive glomerulonephritis is not uncommon. The recognition of multisystem disease involving joints, kidney, and lung is critical for diagnosing Wegener\'s vasculitis. Here, we report a case study of a 52-year-old Bangladeshi man presented with a history of progressively worsening fever, recurrent cough, and hemoptysis. He developed renal failure within a month which was successfully treated with high-dose steroids, cyclophosphamide, and trimethoprim-sulfamethoxazole (TMP-SMX). Rapidly progressive glomerulonephritis can be a fulminant manifestation of GPA, in which case an immediate and aggressive treatment with pulse steroids, high-dose cyclophosphamide and TMP-SMX can be lifesaving.