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Collagenous fibroma, also known as desmoplastic fibroblastoma, is a slow-growing, deep-set, benign fibrous tumor, usually located in the deep subcutis, fascia, aponeurosis, or skeletal muscle of the extremities, limb girdles, or head and neck regions.
Intravascular papillary endothelial hyperplasia typically manifest as deep nodules or well-defined, round, red, or purple superficial papules.They are usually tiny, ranging in size from 0.5 to 5 cm. [3] IPEH lesions are most common in the digits and among blood arteries throughout the body, although they can also form in the head, neck, and body.
A myxoid liposarcoma is a malignant adipose tissue neoplasm [1] of myxoid appearance histologically.. Myxoid liposarcomas are the second-most common type of liposarcoma, representing 30–40% of all liposarcomas in the limbs, occurring most commonly in the legs, particularly the thigh, followed by the buttocks, retroperitoneum, trunk, ankle, proximal limb girdle, head and neck, and wrist.
Myxoinflammatory fibroblastic sarcoma, [34] also termed acral myxoinflammatory fibroblastic sarcoma because it was initially thought to be limited to acral (i.e. leg and arm) areas. [35] Infantile fibrosarcoma, also termed congenital infantile fibrosarcoma and fibrosarcoma, infantile type. [36] Malignant FMTs
A dermatofibroma, or benign fibrous histiocytomas, is a benign nodule in the skin, typically on the legs, elbows or chest of an adult. [3] It is usually painless. [3]It usually ranges from 0.2cm to 2cm in size but larger examples have been reported. [3]
Cerebellar pontine angle and internal auditory canal lipomas [10] Chondroid lipomas are deep-seated, firm, yellow tumors that characteristically occur on the legs of women. [7]: 625 Corpus callosum lipoma is a rare congenital brain condition that may or may not present with symptoms. [11]
[10] The most common type of reactive proliferative tumors are pyogenic granulomas also known as lobular capillary hemangiomas, that are more often found in children and young adults. [4] These granulomas are well defined growths of less than a centimetre across. They are bright red due to being highly vascularised, and bleed and ulcerate ...
About 10% of cases do not have lesions on the legs but rather present with one or more skin lesions outside of the legs; ~20% of individuals present with cutaneous lesion(s) but on further or later investigation are found to have disease in non-cutaneous sites such as the lymph nodes, visceral organs, [1] bone marrow, and/or, rarely, central ...