The Hip - book

Synovial Sarcoma

– See: Soft Tissue Tumor Menu – Discussion:     – 4th most common soft-tissue sarcoma (5 to 10 percent of all cases of soft-tissue sarcoma)     – tumor derived from the synovial tissues found along fascial planes, periarticular structures, and rarely, in joints;              – it may involve the … Read more

Synovium

– See:       – Pigmented Villonodular Synovitis       – Friction and Lubrication       – synovial fluid       – Synovium of the Knee       – Synovial Plica – Discussion:     – synovial membrane is innermost portion of capsular ligament of synovial joint;     – … Read more

Symbiotic infections

– Discussion:     – caused by non hemolytic Strep and hemolytic Staph aureus;     – although staph alone may show up on culture, special attention may must be paid to isolating the microaerophilic Streptococceae;     – necrotizing fascitis may occur, especially in diabetics;     – any hand infection that does not respond … Read more

Syme’s Amputation

– Discussion:     – includes ankle disarticulation, removal of malleoli, & anchoring heel pad to the wt bearing surface) allows execellent gait with a cosmetic             prosthesis;     – symes amputations will not heal w/o palpable posterior artery pulse;     – surgery may be performed in 2 stages;     – most common … Read more

Syndactyly

        – See: Acrosyndactyly; – Discussion:     – failure of differentiation of the tisses between the fingers at 5th-8th week of intrauterine life (see limb development);     – most common in the middle and ring fingers;     – syndactyly (webbing  or fusion of two or more digits), a result of failure of … Read more

Syndactyly: Associated Syndromes

    – Acrosyndactyly;     – Delta Phalanx;     – Poland’s syndrome:            – hypoplasia of hand and simple syndactyly of fingers on the same side as the absent pectoral muscles (and other chest wall muscles);     – Apert’s Syndrome:            – when all digits are … Read more

Syndesmotic Injuries of the Ankle

  – See: syndesmotic sprain – Anatomy: – syndesmosis is made up of anterior-inferior tibiofibular ligament, interosseous ligament, and posterior-inferior fibular ligaments, inferior transverse tibiofibular ligament, and interosseous ligament; – these stabilize the mortise by opposing the fibula in the fibular notch (incisura fibularis tibiae); – section of the anterior tibiofibular ligament results in diastasis of … Read more

Syndesmotic Sprain

– See: Technique of Snydesmotic Fixation – Discussion:     – if only syndesmotic ligaments are divided (w/ fibula & collateral ligaments intact) there will be no widening of mortise or lateral displacement of talus;     – compressing the fibula and tibia above the ankle elicits tenderness at the syndesmosis, implies injury to the … Read more

Sustentaculuum Tali Fractures

– Discussion:  – fractures of the sustentaculum tali result from landing on the heel combined with severe inversion of the foot; – inversion of foot produces acute pain just below the medial malleolus;  – pain may be accentuated by passive hyperextension of the great toe;  – this fracture may be mistaken for an ankle fracture;  … Read more