RESUMO
COVID-19 usually presents with classic signs and symptoms, but it can involve multiple systems in atypical cases. SARS-CoV-2 has a complex interaction with the host immune system leading to atypical manifestations. In our case, a 32-year-old male patient presented with fatigue, sores on hands and feet, headache, productive cough with blood-tinged mucus, conjunctival hyperemia, purpuric rash on hands and feet, and splinter hemorrhages of fingernails for 2 weeks. The patient's SARS-CoV-2 antigen and PCR test were positive. Chest X-ray showed mixed density perihilar opacities in both lungs. Computed tomography of the chest showed extensive airspace opacities in both lungs, suggesting COVID-19 multifocal, multilobar pneumonitis. A renal biopsy indicated limited thrombotic microangiopathy and tubulointerstitial nephritis, for which he was started on steroids, and his renal functions gradually improved. He tested positive for C-ANCA during an immune workup. He was discharged with a steroid taper for nephritis. Once the taper reached less than 10 mg/day, he developed acute scleritis and a new pulmonary cavitary lesion of 6 cm. The biopsy via bronchoscopy revealed acute inflammatory cells with hemosiderin-laden macrophages. He was restarted on systemic steroids for scleritis after failing topical steroids, which incidentally also reduced the size of the cavitary lesion, indicating an immune component. Our case demonstrates the involvement of kidneys and vasculitis of the skin, sclera, and lungs by COVID-19. The patient's symptoms were not explained by any diseases other than COVID-19. Atypical cases of COVID-19 disease with multifocal systemic symptoms involving the skin, sclera, lungs, and kidneys should be high on differentials. Early recognition and intervention may decrease hospital stays and morbidity.
RESUMO
B-cell lymphoproliferative disorders are characterized by the accumulation of mature B lymphocytes in the bone marrow, lymphoid tissues, and/or peripheral blood. They can cause amyloid deposits in the lungs. In rare cases, lung nodules can be the first sign of this disorder. We present the case of an 89-year-old woman with stable shortness of breath and lung nodules on imaging. A positron emission tomography-computed tomography (PET-CT) scan showed the most intense hypermetabolic nodule in the patient's lung, which was 1.5 × 1.4 cm. A biopsy of this nodule showed amyloid material with trapped plasma cell infiltrate on microscopy. Congo red stain under polarizing microscopy showed apple-green birefringence, which is diagnostic for amyloidosis. Immunohistochemistry showed a mixture of kappa-positive and lambda-positive cells. B-cell gene rearrangement-clonal gene rearrangements were detected in the immunoglobulin heavy chain (IgH) gene and the kappa light chain (IGK). These findings suggest a B-cell lymphoproliferative disorder, such as a plasmacytoma or a marginal cell lymphoma with plasma cell differentiation. The patient was diagnosed with a B-cell lymphoproliferative disorder and pulmonary amyloidosis. Isolated amyloidosis in the lungs usually has a good prognosis, but it can be a sign of autoimmune diseases or B-cell lymphoproliferative disorders, as in this case. Early diagnosis of B-cell lymphoproliferative disorder can lead to successful treatment and prevents complications.
RESUMO
Inflammatory myofibroblastic tumors (IMTs) are a group of soft tissue neoplasms with a predilection for the lungs and abdominopelvic cavity, characterized by a mixture of fasciitis-like, compact spindle cells, hypocellular fibrous histologic patterns, and distinctive molecular features. Due to their unspecified symptoms and non-specific radiologic presentation, the histopathologic and immunohistochemical analysis of a biopsy specimen is crucial for the diagnosis. We present a case of a 30-year-old man with intermittent hemoptysis diagnosed with a pulmonary IMT. We aim to review the literature regarding its definition, clinical findings, diagnosis, treatment, and prognosis. The treatment for an IMT is based on its location and extent, including complete surgical resection, which has a good prognosis compared to corticosteroids, chemotherapy, radiotherapy, and non-steroidal immunomodulation in patients who are not good surgical candidates. Further investigative studies with larger sample sizes and longer meticulous follow-ups are needed to demonstrate this neoplastic disease's natural history and find appropriate management for it.