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Surgically treated humeral shaft fractures can develop into pseudoarthrosis (PSA). Even if PSA is treated according to the proposed literature, refractory non-union of the humerus can be determined. Due to the rarity of this condition, we report our experience in the management of refractory pseudarthrosis of the humerus at the IRCCS Galeazzi Orthopedic Institute (Milan, Italy). We used internal fixation with plate and screws associated with the implant of the IlluminOss® Photodynamic Bone Stabilization System to increase bone stability and improve anchoring of the implant medium. This combined treatment allowed the consolidation of the complex fracture despite the bone loss, ensuring excellent stability of the fracture stumps and constituting a flexible and stable system with the most favourable biomechanical conditions. An increase in refractory PSA cases is likely in the future, due to a higher incidence of surgically treated humeral shaft fractures than in the past. Further studies on the effectiveness of the combined use of plate and screw and the IlluminOss® system will be indispensable.

Clavicular fractures make up 2.6-4% of all fractures in adults. The most frequent mechanism of injury is a fall with direct trauma to the shoulder during sports or road accidents. These fractures can have acute complications such as vascular lesions, nerve injuries, pneumothorax, and musculoskeletal injury. Primary brachial plexus injuries are rare events, both in the adult and paediatric population, have an incidence of less than 1% and are usually caused by direct compression of the fragments. We describe a case of midshaft clavicular fracture treated conservatively with a figure-eight bandage, associated with acute brachial plexus injury, and possible medico-legal repercussions thereof. It is important to recognize the progression of neurological deficits early on, in order for appropriate treatment to be undertaken promptly. Patients must be monitored and re-evaluated within few days after the injury to check the correct positioning of the brace, its degree of tolerability, and the possible onset of neurological deficits, because some clavicular fractures can be associated with compression of the brachial plexus.

Peripheral arterial disease (PAD) is an atherosclerotic process that causes stenosis and occlusion of non-cerebral and non-coronary arteries. Critical ischemia of the lower limbs is the most advanced and severe state of arterial disease. The purpose of this work is to underline the importance of a timely diagnostic-therapeutic framework in case of critical ischemia of the lower limbs, through a precise, coordinated, and multidisciplinary teamwork. A significant example is represented by the presentation of a clinical case that came to our observation following a request for compensation and which required an adequate evaluation in the medical-legal field. This work will make possible to clarify any profiles of medical professional responsibility, with specific reference to the predictability and preventability of the unfavorable events that have occurred, and which have led to a progressive worsening of the patient's clinical condition, which then resulted in the amputation of the lower limb, associated to organic deterioration and progressive complete permanent disability. In these cases, the collection of semeiological data must be careful, meticulous, and completed by suitable instrumental investigations. These data, with the exhaustive compilation of the medical record, play a decisive role even in the presence of adverse events and/or infrequent complications, in order to demonstrate from a medico-legal point of view that despite the implementation of all precautions codified by the specialized discipline, the adverse event, however foreseeable, is not always concretely preventable and therefore avoidable, being included in the non-negligent "complication" and not necessarily attributable to professional responsibility.