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Examples of this use of the term granuloma are the lesions known as vocal cord granuloma (known as contact granuloma), pyogenic granuloma, and intubation granuloma, all of which are examples of granulation tissue, not granulomas. "Pulmonary hyalinizing granuloma" is a lesion characterized by keloid-like fibrosis in the lung and is not ...
The histopathologic characteristics seen in these lesions are heterogenous. The cells of a lesion of invasive carcinoma NST may retain >70% ductal differentiation or appear completely undifferentiated. The tumor cells may be arranged in sheets, nests, cords, or singly distributed. They are pleomorphic (i.e., vary in size and shape).
Generally speaking, however, the term tumor is used generically, without reference to the physical size of the lesion. [3] More specifically, the term mass is often used when the lesion has a maximal diameter of at least 20 millimeters (mm) in the greatest direction, while the term nodule is usually used when the size of the lesion is less than ...
In prostate cancer, the abnormal cells spread beyond the boundaries of the acinus and form clusters without basal cells. In HGPIN, the basal cell layer is disrupted but present. PIN is primarily found in the peripheral zone of the prostate (75-80%), rarely in the transition zone (10-15%) and very rarely in the central zone (5%), a distribution ...
A lung nodule or pulmonary nodule is a relatively small focal density in the lung. A solitary pulmonary nodule (SPN) or coin lesion, [1] is a mass in the lung smaller than three centimeters in diameter. A pulmonary micronodule has a diameter of less than three millimetres. [2] There may also be multiple nodules.
Lesion size may be specified as gross, meaning it is visible to the unaided eye, or histologic, meaning a microscope is needed to see it. [ 4 ] [ 5 ] A space-occupying lesion , as the name suggests, has a recognizable volume and may impinge on nearby structures, whereas a non space-occupying lesion is simply a hole in the tissue, e.g. a small ...
Focal nodular hyperplasia (FNH) is the second most common benign tumor of the liver. [2] FNH is found in 0.2%– 0.3% of adults worldwide. [ 2 ] FNH is more common in females (10:1 female to male ratio) except in Japan and China, in which there is a more equal prevalence of cases between females and males. [ 2 ]
Focal neurological deficits may be caused by a variety of medical conditions such as head trauma, [1] tumors or stroke; or by various diseases such as meningitis or encephalitis or as a side effect of certain medications such as those used in anesthesia. [2] Neurological soft signs are a group of non-focal neurologic signs. [3]