Giant Pilomatricoma of the Scalp: A Case Report

Pilomatricoma is a benign cutaneous tumor originating from hair follicle matrix cells and characterized by the presence of subcutaneous nodules of up to 3.0 cm in diameter, usually on the head, neck and upper extremities. It is most common in the first two decades of life and after the age of 60. We report a case of an adult female patient was evaluated, presenting a solid tumoral lesion, with approximately 3.5 x 3.0 cm in size, in the scalp. It was thought to be a squamous cell carcinoma, sarcoma, amelanotic melanoma, or nodular basal cell carcinoma. The resection of the lesion was carried out and, at the histological examination, specific details were observed that led to the diagnosis of pilomatricoma. Pilomatricoma should be suspected in the differential diagnosis of other cutaneous tumors

EPS architecture analysis for future highpower missions

The space tug can represent a valid solution to provide transportation capabilities for future space missions. In particular, the tug can be effectively adopted for different applications such as electric orbit raising for commercial satellites and cargo transfer to resupply space infrastructures. The adoption of high-power electric propulsion is a fundamental enabler for these mission scenarios, owing to its advantages in terms of long lifetime, high performance and operational flexibility. However, further investigation should be performed in order to optimize the design of the space tug considering different architecture alternatives. We defined two sets of thruster operative points for a more representative comparison of EPS architecture cases. In particular, we analyzed three aspects: the adoption of a cluster of thrusters vs the monolithic approach; the implementation of a direct drive power supply vs the traditional power processing unit; the selection of krypton propellant vs xenon. The design of the space tug is performed with MAGNETO tool, a software developed in a collaboration between SITAEL and Politecnico di Torino in the framework of an ESA GSTP project. The results are compared by means of the analytical hierarchy process to identify the optimal design solution for the spacecraft design