UNLABELLED Abstract Background: Skin laxity and cellulite on the buttocks and thighs are two common cosmetic concerns. Skin tightening with radiofrequency (RF) devices has become increasingly popular. OBJECTIVE The purpose of this study is to evaluate the efficacy and safety of a topical skin laxity tightening agent when used in combination with an RF device. METHODS A double-blinded, rando...

Porokeratosis represents a spectrum of clinical diseases. Multiple variants have been described including porokeratosis ptychotropica, a rare subtype. The coexistence of two or more variants of porokeratosis in a single patient is regarded as a rare occurrence. Here we report a patient with porokeratosis ptychotropica with coexistent porokeratosis of Mibelli. The patient was a 47-year-old man w...

The perianal appearances were studied prospectively of 136 constipated children (mean age 3.9 years, 67 boys, 69 girls). Anal dilatation, fissures, tags, warts, perianal oedema, redness, blueness, and veins were recorded. It was noted whether dilatation occurred immediately or at 30 and 60 seconds with the buttocks minimally separated, and on subsequent firm lateral traction of the buttocks. Th...

Analytical investigations on the contact problems between two homogeneous and isotropic soft bodies were performed to simulate the contact of human buttocks and seat cushions. The cushion materials’ Poisson’s ratio were allowed to be negative. The human buttocks were modeled as an ideal sphere with radius 15 cm, and assumed to have a low Young’s modulus and a Poisson’s ratio close to 0.5. These...