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BACKGROUND Single soft tissue metastasis of medullary thyroid carcinoma is extremely rare. In addition, several occult medullary thyroid carcinomas with distant metastasis were reported, but undetectable primary lesion at diagnosis was also extremely rare. CASE PRESENTATION A 74-year-old man was admitted to our hospital because of a painful nodule in his left buttock for over 1 year. Needle b...
A novel approach using sorafenib in alpha fetoprotein-producing hepatoid adenocarcinoma of the lung.
Hepatoid adenocarcinoma of the lung (HAL) is an extremely rare cancer without clear treatment guidance and with a poor prognosis. This report discusses a 64-year-old man who presented with complaints of hemoptysis and was found to have a right upper lobe (RUL) lung mass on chest CT with presence of a right hilar mass and retrocaval lymphadenopathy, and metastasis to the vertebral spine and rib....
Rattus norvegicus is a natural reservoir host for pathogenic species of Leptospira. Experimentally infected rats remain clinically normal, yet persistently excrete large numbers of leptospires from colonized renal tubules via urine, despite a specific host immune response. Whilst persistent renal colonization and shedding is facilitated in part by differential antigen expression by leptospires ...
The differential diagnosis between pleural malignant mesothelioma (MM) and lung cancer is often challenging. Immunohistochemical (IHC) stains used to distinguish these malignancies include markers that are most often positive in MM and less frequently positive in carcinomas, and vice versa. However, in about 10-20% of the cases, the IHC results can be confusing and inconclusive, and novel marke...
BACKGROUND Sclerosing pneumocytoma is a rare lung tumor that is usually recognized as a solitary nodule in the lung. Surgical removal is recommended; however, its clinical diagnosis is still an issue because it is difficult to differentiate from lung adenocarcinomas using a tiny sample obtained from biopsy. CASE PRESENTATION We report a case of pulmonary sclerosing pneumocytoma located in the...
A 66-year-old woman presented with a 2-year history of asthma has progression of dyspnea within a week, and a computed tomography (CT) revealed an endotracheal tumor at level of aortic arch. The resected tumor, measured by 18 × 12 × 10 mm, has histologically malignant features including frank invasion with desmoplastic stroma and foci of necrosis. Presence of glycogen and mucin was confirmed by...
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