Stress minimization for lattice structures. Part I: Micro-structure design.

Lattice structures are periodic porous bodies which are becoming popular since they are a good compromise between rigidity and weight and can be built by additive manufacturing techniques. Their optimization has recently attracted some attention, based on the homogenization method, mostly for compliance minimization. The goal of our two-part work is to extend lattice optimization to stress minimization problems two-dimensionally.

Regression of Sebaceous Carcinoma of the Eyelid after a Small Incisional Biopsy: Report of Two Cases.

Purpose: To report 2 cases of regression of sebaceous carcinoma of the eyelid after a small incisional biopsy.

Methods: Clinical, imaging, and histopathological findings are presented, with a literature review on regressing ocular tumors.

Results: Our first patient was a 79-year-old man who presented with a 10-month history of progressive left upper eyelid ptosis caused by an eyelid tumor with orbital involvement and confirmed on magnetic resonance imaging.