Research Desk

Jun 24, 2020

Polycythemia vera is one of the myeloproliferative neoplasms that is distinguished by the uncontrolled production of blood cells and an increased red cell mass due to acquired JAK2 mutation. It has many complications and it might increase the risk of other tumors. However, it does not cause hypercalcemia and is rarely associated with parathyroid adenoma. Ahmed M. Abdalhadi and Mohamed A. Yassin report on a 64-year-old female with polycythemia vera found to have hypercalcemia due to parathyroid adenoma.

Jun 22, 2020

Durvalumab, a programmed cell death ligand 1 inhibitor, induces various immune-related adverse events (irAEs), including lung injury. However, diffuse alveolar hemorrhage (DAH) is a rare type of lung injury due to immune checkpoint inhibitors. A 76-year-old man with c-stage IIIA squamous cell carcinoma of the lung received maintenance durvalumab therapy after chemoradiotherapy. He developed dyspnea and malaise after 11 cycles of durvalumab. Chest computed tomography showed rapidly spreading bilateral ground-glass opacity in the lungs. We diagnosed DAH by hemosiderin-laden macrophages in bloody bronchoalveolar lavage fluid. Despite mechanical ventilation, steroids, and cyclophosphamide, he died of respiratory failure. The autopsy revealed that fresh and old bleeding areas coexisted, and neither pulmonary vasculitis nor diffuse alveolar damage was detected microscopically. Furthermore, CD3+ and CD8+ lymphocytes were observed in the lung interstitium, whereas CD20+ and CD4+ lymphocytes were scarcely detected. We report the first case of durvalumab-induced DAH. We should be alert to irAEs with DAH as a potential differential diagnosis of lung injury during durvalumab treatment.

Jun 19, 2020

Only three cases of patients suffering from a localized chronic form of Langerhans cell histiocytosis (LCH) successfully treated with radiofrequency ablation (RFA) have been published so far. This is the first case report of a patient with a localized chronic form of LCH of the femur, which was successfully treated with percutaneous image-guided RFA, and who was evaluated pre-RFA and followed up post-RFA for a period of 48 months, in order to validate the safety and efficacy of this method and to obtain imaging studies depicting the actual in situ changes taking place post-RFA. RFA was proved to be a safe and efficient method when treating patients with a localized chronic form of LCH.

Jun 19, 2020

Recent data suggest that BRCA mutation carriers younger than 40 may not benefit from mammography in addition to MRI. Our objective was to evaluate screening modalities utilized in a high-risk population. Clinicopathologic data were abstracted for patients followed in a high-risk clinic from 2007 to 2017.  Three patients were diagnosed younger than 40, 1 on a mammogram, and 2 on MRI. The patient diagnosed on mammogram had no prior MRI and the lesion was seen on follow-up MRI. Interval screening MRI identified DCIS in BRCA patients with a previous normal mammogram and cancers diagnosed on mammograms were all identified on follow-up MRI. These findings support further evaluation of MRI alone until age 40 in BRCA mutation carriers.

Jun 19, 2020

The use of immune checkpoint inhibitors has dramatically improved the chance of surviving malignant melanomas; however, the effect comes at the cost of toxicities that are difficult to predict. Immune-mediated hepatitis is the most common form of liver toxicity, but a fatal outcome is uncommon. We report the case of a 70-year-old female with metastatic malignant melanoma who developed severe liver toxicity characterized by bile duct injury and cholestasis. The condition progressed despite potent immunosuppressive treatment, plasmapheresis, and intensive supportive care; and the patient died while still having tumor response.

Jun 19, 2020

Gastric cancer incidence is high in several countries, and the management of advanced gastric cancer remains a challenge. Chemotherapy for unresectable gastric cancers is still evolving, and achieving a complete cure is difficult. Although a clinical complete response to chemotherapy has been reported in patients with unresectable gastric cancer, the chemotherapy duration for these patients is unclear. Shishida M et al report the case of a 71-year-old man who presented with abdominal discomfort. Upper endoscopy revealed advanced gastric cancer on the upper gastric body. Histopathological examination revealed a poorly differentiated adenocarcinoma. Computed tomography revealed a regional lymph node and multiple bilobar hepatic metastases. Radical surgery was not possible; therefore, palliative resection of the primary lesion was planned for symptomatic improvement. Tegafur, 5-chloro-2,4-dihydro­pyrimidine, and potassium oxonate were administered prior to surgery, and proximal gastrectomy was performed. Tegafur, 5-chloro-2,4-dihydropyrimidine, and potassium oxonate administration were reinitiated after surgery. 

Feb 26, 2020

Isabella Aquila describe a case of Sudden death due to Takayasu’s arteritis and how histopathology came in handy by revealing eosinophilia in the aortic wall, consistent with a vasculitis such as Takayasu’s arteritis as the autopsy only showed sclerosis of the thoracic aorta, abdominal aorta and coronary arteries. 

Feb 25, 2020

Shuquan Zhao presented a case of a a 21-year-old woman diagnosed with “acute gastroenteritis”  who expired 4 days later. Autopsy findings revealed an inflammatory polypous embolic located at 1.0 cm from the left anterior descending branch. To find the real cause of this embolus, virus detection was performed through RT-PCR, however the findings were negative. 

Feb 24, 2020

F. Coussy et al sought to determine the response to PI3K and MAPK pathway inhibitors in patient-derived xenografts of MBCs with targetable alterations. The treatment of metaplastic breast cancer PDXs by activation of the PI3K-AKT-mTOR and RTK-MAPK pathways at the genomic and protein levels with a combination of PI3K and MEK inhibitors resulted in tumor regression in mutated models and may, therefore, be of interest for therapeutic purposes.



Feb 24, 2020

Isaac Biney reported the case of a 65-year-old female with limited SSc complicated by severe PAH and a nonhealing left lower extremity venous ulcer. HBO2T was successfully used as an adjunct in her management resulting in complete resolution of the venous ulcer and improved quality of life without any adverse effects on her pulmonary arterial hypertension.