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April 2007
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Lipoma is a very common
subcutaneous which accounts for more than 90% of the adipocytic tumours
reported by the pathologists.
Fibrolipoma- There is increased stromal fibrosis. Fibrolipomatous hamartoma of Nerve: CLICK HERE
Angiomyxolipoma-
The
lesion consists of adipose tissue without lipoblasts, extensive myxoid
areas, and numerous blood vessels. Chondrolipoangioma- Prominent chondro osseous and vascular component. Myxoid lipoma ,myxolipoma: A myxoid background stroma. Myelolipoma: Benign, tumor-like lesion consisting of mature adipose tissue with hematopoietic elements arising in the adrenal. Most are asymptomatic and are discovered accidentally. D/D:Extramedullary hematopoiesis. IMAGE Intramuscular lipoma: PUBMED LINK Occurs in middle to late adult life. Presents as deep seated slow growing usually painless mass in the large muscles of the extremities specially those of the thigh, shoulder and upper arm and in the chest wall. They may be divided into infiltrative and well-circumscribed types. Histologically striated muscle fibres are diffusely infiltrated by mature.adipocytes. No atypical features are present. D/D- well differentiated liposarcoma ; diffuse lipoblastomatosis (occur in infants and children; subcutis and muscle are affected;more than one type of muscle involved). IMAGE1 ; IMAGE2 ; IMAGE3 ; IMAGE4 . Myolipoma: Characterized by adipose tissue together with smooth muscle fibres usually located in the retroperitoneal location and the abdomen. D/D angiomyolipoma and liposarcoma with heterologous elements. Nevus lipomatosus:
This lesion presents as plaque or
solitary lesions. Synovial lipoma: (Lipoma Arborescens) PUBMED LINK This is a rare benign intrarticular lesion characterised by the replacement of the subsynovial tissue by mature fat cells giving rise to a villous proliferation. IMAGE Infiltrating lipoma- Infiltrating lipoma is an uncommon mesenchymal neoplasm that characteristically infiltrates adjacent tissues and tends to recur after excision. These are usually located in the thigh, shoulder region, upper arm and in the chest wall.This type of lipoma may rarely occur in the head and neck region. Lipedematous scalp- There is thickening of the subcutaneous fat of the scalp. This is usually associated with alopecia. Lipomatosis-
Conditions in which diffuse masses of
adipose tissue develop in the subcutaneous tissue. Image
(DermAtlas)
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