Fat-Free Spindle Cell Lipoma of the Scalp: Lipoma Without a Lipogenic Component

Abstract

In contrast, young patients are injured most frequently from focal trauma like assault or contusion. The force from the trauma is transmitted to the orbit contents through the eye. 15,18 Adeyemo et al performed experiments with cadavers to compare the 2 mechanisms. The buckling mechanism caused relatively small-sizedblowout fractures that were limited to the anterior orbital floor, whereas the hydraulic mechanism produced a large-sized-fracture on the orbital floor and medial wall. However, there were no differences in complex blowout fractures among the age groups.This might be attributed to the difference in paranasal anatomy. The ethmoidal cell septa are resistant to this ''hydraulic force'' that reduces the medial wall fracture. 5 The number of ethmoidal cells was significantly higher in the young group, and both bone rigidity and bone flexibility decrease with age, which increases the risk of fracture. 15 In this study, there was a significant difference in fracture site by age. According to previous studies, there is a difference in expected post operative complication depending on the fracture site. 3,20 Therefore, we suggest the need for further study on the difference in the postoperative complication after blowout fracture surgery by age will be needed.This study had several limitations. First, we categorized a fall, slip, car accident as gross trauma and assault, and the causes ranged from sports to focal trauma. However, the mechanism might not have provided enough detail for sufficient classification. Second, we only investigated air cell number and did not examine other factors like anteroposterior length, lamina papyracea area, and anterior height. in addition, it is possible that the ethmoidal cell anatomy was asymmetrical. Third, this study was designed retrospectively and included only Korean patients. The anatomy of the orbit and ethmoid air cell septa differ among races, and results for other populations could differ from the results reported for East Asians.In summary, older patients are more likely to experience medial wall fracture than are younger patients. The results of this study could be attributable to the difference in the anatomy of ethmoidal cells and difference in the cause of blowout fracture.

A case of occipital spindle cell lipoma: a case report

“…Pathologically, SCLs exhibit variable amounts of three elements: bland spindle cells aligned in parallel bundles, mature adipocytes and ropey collagen [ 6 ]. However, diagnosis can be elusive when low-fat and free-fat patterns occur [ 7 ]. Therefore, immunostaining is used for definitive diagnosis.…”