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Myxoma is a rare, benign stromal tumor of mesenchymal origin often confused with other conjunctival stromal tumors. Conjunctival myxomas are thought to originate in Tenon's capsule and can masquerade as conjunctival lymphoma , lymphangioma , ocular surface squamous neoplasia (OSSN), or amelanotic melanoma .
The mass size can obstruct blood flow or interfere with cardiac valve function and produce symptoms of heart failure. A tumor that invades the heart walls may cause arrhythmias, heart block, or pericardial effusion with or without tamponade. Tumors that invade adjacent lung tissue may cause pulmonary symptoms that mimic bronchogenic carcinoma. [6]
A myxoma is a rare benign tumor of the heart. Myxomata are the most common primary cardiac tumor in adults, and are most commonly found within the left atrium near the valve of the fossa ovalis. Myxoma may also develop in the other heart chambers. [1] The tumor is derived from multipotent mesenchymal cells. [1]
Most heart tumors begin with myxomas, fibromas, rhabdomyomas, and hamartomas, although malignant sarcomas (such as angiosarcoma or cardiac sarcoma) have been known to occur. In a study of 12,487 autopsies performed in Hong Kong seven cardiac tumors were found, most of which were benign. [ 1 ]
Call–Exner bodies marked with black circles in an intermediate-high magnification micrograph of a granulosa cell tumour, a type of sex cord stromal tumour. H&E stain. H&E stain. Call–Exner bodies , giving a follicle-like appearance, are small eosinophilic fluid-filled punched out spaces between granulosa cells . [ 1 ]
A papillary fibroelastoma is a primary tumor of the heart that typically involves one of the heart valves. [1] Papillary fibroelastomas, while considered uncommon, make up about 10 percent of all primary tumors of the heart. [2] They are the third most common type of primary tumor of the heart, [3] behind cardiac myxomas and cardiac lipomas.
Small blue round cells of Ewing Sarcoma Display of small round blue cells characteristic of desmoplastic small round cell tumour.. In histopathology, a small-blue-round-cell tumour (abbreviated SBRCT), also known as a small-round-blue-cell tumor (SRBCT) or a small-round-cell tumour (SRCT), is any one of a group of malignant neoplasms that have a characteristic appearance under the microscope ...
It is a characteristic histologic finding of a recent myocardial infarction (heart attack) that was partially reperfused. The name of the histopathologic finding comes from the appearance under the microscope; contraction bands are thick intensely eosinophilic staining bands (typically 4-5 micrometres wide) that span the short axis of the myocyte.