Rare Overlap of Granulomatosis With Polyangiitis in a Patient With Rheumatoid Arthritis.

Granulomatosis with polyangiitis (GPA) is a systemic small/medium-sized vessel vasculitis, which is a member of the family of antineutrophil cytoplasmic auto-antibody-associated vasculitides. This disorder affects multiple organs as it is a systemic disease, but overlapping with rheumatoid arthritis is extremely rare, with few cases reported in the medical literature. We report a case of a 55-year-old female with a history of rheumatoid arthritis who presented with recurrent upper/lower respiratory tract symptoms that responded poorly to antibiotics. The patient had elevated antiproteinase antibodies, ANCA IgG titer with a cytoplasmic staining pattern, proteinuria, hematuria, chest imaging showing cavitating and non-cavitating masses, and biopsies of lung and nasal tissue confirming the diagnosis of GPA. Our patient was given immunosuppressant therapy and improvement in lab work and clinical symptoms were seen throughout the course of treatment. This case report is unique as GPA usually rarely presents with rheumatoid arthritis (RA), but in this case, the patient had a history of rheumatoid arthritis with a new biopsy-proven GPA. This case report will help future physicians to better diagnose similar cases and help to facilitate clinical recognition and treatment for the same.

Catastrophic Thromboembolic Syndrome During the COVID-19 Pandemic.

Since March 2020, the SARS-CoV-2 virus known to cause COVID-19 has presented in many ways and it seems to affect almost all organ systems. One of its detrimental effects is on the coagulation system. Disruption of the coagulation pathway or hypercoagulability has been reported extensively in many articles and studies. It seems there is no specific pattern or location of the coagulopathy. The coagulopathy can present as part of the respiratory disease process or as an isolated phenomenon. Many articles had reported that the thrombus can be a venous thromboembolic phenomenon such as deep venous thrombosis (DVT), portal vein thrombosis, pulmonary embolism (PE), or as arterial thrombosis, for instance, coronary artery thrombosis, cerebrovascular thromboembolic disease (i.e., stroke), or an aortic thrombus. One of the disastrous presentations is what is called "catastrophic thrombosis syndrome." This syndrome is characterized by multiple thromboses that take place in different parts of the vascular system at different parts of the body at the same time. In many studies, D-dimer levels have been shown to predict the risk of increased thromboembolism in SARS-CoV-2. However, an appropriate anticoagulation agent, dosage, and duration are yet to be determined. We are presenting an interesting case of a female who suffered catastrophic thrombosis syndrome despite being on prophylactic anticoagulation. She presented with leg pain and was found to have extensive multiple thrombi starting from the ascending/descending aorta and extending to the distal peroneal arteries.

Chronic Atrophic Gastritis Presenting as Hemolytic Anemia due to Severe Vitamin B12 Deficiency.

Vitamin B12 is an essential nutrient which plays an important role in neurological function, hematopoiesis, and DNA synthesis. Low levels usually stem from either poor intake or a malabsorptive process. Presently, the most common cause of vitamin B12 deficiency is food-bound cobalamin malabsorption, which occurs when there is impaired release of vitamin B12 from ingested food due to an outstanding factor preventing the release of the nutrient from its transport protein. Such causes include achlorhydria, gastritis, gastrectomy, or the use of PPIs or antacids. A rarer cause is autoimmune chronic atrophic gastritis, resulting in pernicious anemia. In this disease process, there is destruction of parietal cells and thus a reduction in intrinsic factor, which is essential to the absorption of vitamin B12. Deficiency will result in a variety of abnormalities including but not limited to pancytopenia, paresthesias, and neuropsychiatric symptoms. A rare manifestation of vitamin B12 deficiency is hemolytic anemia, which occurs due to intramedullary and extramedullary dysfunction. This case describes a 46-year-old male with no past medical history who presented with chest pain, fatigue, and progressive weakness, found to have hemolytic anemia, ultimately attributed to vitamin B12 deficiency. Antiparietal cell antibodies and intrinsic factor antibodies (IFA) were both negative. Still, the patient underwent an endoscopy with biopsies of the stomach; pathology was consistent with chronic metaplastic atrophic gastritis. The patient improved with intramuscular vitamin B12 supplementation. This case highlights both a rare cause and presentation of vitamin B12 deficiency. Patients with autoimmune chronic atrophic gastritis should have antiparietal cell or intrinsic factor antibodies. Still, seronegative patients have been reported, like this patient. Additionally, hemolytic anemia secondary to vitamin B12 deficiency is uncommon. The presentation will usually mirror that of a thrombotic microangiopathy (TMA), including hemolytic anemia with schistocytes on peripheral blood smear and thrombocytopenia, as it did in this patient. This clinical entity is described as pseudothrombotic microangiopathy and is crucial to identify in order to prevent the initiation of invasive treatment strategies such as plasmapheresis.