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Oncology. A glomus tumor (also known as a "solitary glomus tumor" [1]) is a rare neoplasm arising from the glomus body and mainly found under the nail, on the fingertip or in the foot. [2]: 670 They account for less than 2% of all soft tissue tumors. [3] The majority of glomus tumors are benign, but they can also show malignant features. [4]
Specialty. Oncology. A paraganglioma is a rare neuroendocrine neoplasm that may develop at various body sites (including the head, neck, thorax and abdomen). When the same type of tumor is found in the adrenal gland, they are referred to as a pheochromocytoma. They are rare tumors, with an overall estimated incidence of 1 in 300,000. [1]
Hildreth's sign. Hildreth's sign. Differential diagnosis. glomus tumors and hemangiopericytomas. Hildreth's sign is a physical examination technique useful in differentiating glomus tumors and hemangiopericytomas from other masses with a similar appearance. It was first described by DH Hildreth, in 1970.
Glomangiosarcoma. Other names. Malignant glomus tumor. Specialty. Dermatology. Glomangiosarcoma is a low grade [1] tumor of the soft tissue. They rarely metastasize, [2] but metastases are possible. [3] It is also known as malignant glomus tumor. [4] Positive staining for vimentin has been reported.
Longitudinal erythronychia is a red band or streak on the nail plate. The proximal nail fold is where the longitudinal red stripe clinically originates since it starts within the nail matrix. Following its passage through the lunula, the red band follows the nail bed until it reaches the distal tip of the nail plate, when it breaks away from ...
Structure. The aortic bodies are collections of chemoreceptors present on the aortic arch. [1] Most are located above the aortic arch, [2] while some are located on the posterior side of the aortic arch between it and the pulmonary artery below. [3] They consist of glomus cells and sustentacular cells.
The carotid body is a small cluster of peripheral chemoreceptor cells and supporting sustentacular cells situated at the bifurcation of each common carotid artery in its tunica externa. [1][2] The carotid body detects changes in the composition of arterial blood flowing through it, mainly the partial pressure of arterial oxygen, but also of ...
Juxtaglomerular cell tumor. Juxtaglomerular cell tumor (JCT, JGCT, also reninoma) is an extremely rare kidney tumour of the juxtaglomerular cells, with fewer than 100 cases reported in literature. This tumor typically secretes renin, hence the former name of reninoma. It often causes severe hypertension that is difficult to control, in adults ...