RESUMEN
We present an interesting case of mediastinal small cell carcinoma (MSCC), an exceedingly rare entity, comorbid with idiopathic pulmonary fibrosis (IPF). A 66-year-old female was first seen in the pulmonology office for abnormal chest computed tomography (CT) findings of right apical bronchiectasis and subpleural fibrotic changes with focal pleural thickening along the fissures, along with a right lower lobe nodule. Pulmonary function testing (PFT) showed an obstructive pattern with modest bronchodilator response, although subsequent PFT showed a worsening restrictive pattern with a worsening DLCO. On a follow-up CT one year later, a soft tissue density with peripheral calcification was found in the anterior mediastinum, later found to be hypermetabolic on a PET scan. Radiographically, fibrosis worsened with the appearance of worsening diffuse bilateral coarse reticular interstitial changes with lower lobe predominance, honeycombing, and areas of ground-glass opacity. A biopsy of the mediastinal lesion showed a high-grade neuroendocrine tumor. Cam5.2, insulinoma-associated protein-1, synaptophysin, and thyroid transcription factor-1 immunostains were positive. She underwent four cycles of chemotherapy with cisplatin and etoposide with a total of 60 Gy of radiation. Mediastinal mass started to decrease in size. Her respiratory status, imaging, and PFTs continued to show evidence of IPF progression. Prednisone resulted in modest clinical and radiographic response. Steroid-sparing therapy with mycophenolate mofetil, although effective, had to be discontinued due to GI bleeding. Anti-fibrotic therapy was deferred due to evidence showing a lack of clinical improvement. We discuss the existing evidence available on IPF management and proceed to highlight the deficiencies in existing data available on the management of IPF and MSCC in these patients. Most of the cases of MSCC reported in the past have managed MSCC using guidance from treatment practices for small cell lung cancer. No reported cases discuss or describe the management of IPF and MSCC in the very rare cohort of patients our case represents.
RESUMEN
Sweet syndrome (SS) is an acute febrile neutrophilic dermatosis. Although perceived to be rare, the disease may well have been underreported due to lack of exposure in low-volume clinical settings and due to the use of rather strict clinical criteria for diagnosis. It presents as cutaneous papules, plaques, or nodules in an asymmetric distribution that follows fever and flu-like symptoms. Data on the disease is ever-expanding. Several associations have been identified, including drugs, infections, malignancies, and autoimmune diseases. Different disease patterns and histological variants have been identified. Pathophysiology is complex and multifactorial but appears to involve mechanisms that negatively influence neutrophil apoptosis and facilitate neutrophil recruitment. The existing diagnostic criteria exclude cases with vasculitis; over time, cases of neutrophilic dermatoses with vasculitis have been reported as SS as long as other criteria were met. Newer diagnostic models have been proposed, some arguing against the exclusion of vasculitis. Steroids continue to be the mainstay of treatment, and steroid responsiveness continues to be a part of the diagnostic criteria, although newer treatment modalities have been used and have shown promise. No established guidelines exist for management. We present a case of Idiopathic SS with vasculitis along with a brief review of the existing literature. We agree to the inclusion of vasculitis as proposed by the newer diagnostic criteria.
