Superficial Myofibroblastoma in the Vulva Mimicking Aggressive Angiomyxoma: A Case Report and Review of the Literature
Table 2
Pathological features of SMF and other mesenchymal tumors.
(a)
Histological features
Superficial myofibroblastoma (SMF)
Usually moderate, sometimes hypocellularity Fine and dense collagen in stroma Small to medium-sized dilated vessels, often centrally located
Cellular angiofibroma,
Moderate cellularity Wispy collagen stroma Medium-sized vessels, often with hyalinized walls
Mammary type myofibroblastoma,
Moderate to hypercellularity Thick collagen bundle in stroma, adipose tissues may be present Blood vessels are not prominent
Angiomyofibroblastoma, (AMF)
Alternating zones of hyper- and hypocellularity. Loose texture, contains mast cells in stroma, adipose tissues may be present Small to medium-sized capillary-like vessels around which epithelioid stroma cells are clustered
Aggressive angiomyxoma (AA)
Hypocellularity Myxoid stroma, entrapped tissue may be present Numerous blood vessels varying from small size to large size with thick muscular walls