RESUMEN
Different types of delayed pectoralis major myocutaneous flap were studied in the rabbit. Four types of delayed bipedicle flaps were carried out in fifty animals, comparing the survival of delayed and undelayed flaps. The results showed an improvement of survival in the previously delayed flaps, being more profitable for the survival of the flaps the delay procedure in which more than one vascular pedicle was ligated. The beneficial effect of the delay method in the pectoralis major myocutaneous flap in the rabbit can be explained because the vascular anatomy of the flap in this animal, being the myocutaneous component secondary, as it has very few perforating musculocutaneous branches. On the contrary that occurs in men, the skin of rabbits is mainly supplied by axial arteries.
Asunto(s)
Supervivencia de Injerto , Colgajos Quirúrgicos/métodos , Animales , Masculino , Músculos Pectorales , Conejos , Factores de TiempoRESUMEN
The craniofacial resection of the ethmoid is a surgical procedure directed at total extirpation of tumours that extend through the floor of the anterior cranial fossa. We have developed an original approach of the anterior cranial fossa through an osteoplastic frontal flap that has been utilized in a variety of problems of the frontal sinus. The procedure is completed with a facial approach. Different from other types of craniectomy that have been proposed, this method avoids both cosmetic deformity and infectious complications.
Asunto(s)
Hueso Etmoides/cirugía , Seno Frontal/cirugía , Nariz/cirugía , Neoplasias Craneales/cirugía , Estudios de Seguimiento , Humanos , Masculino , Métodos , Colgajos QuirúrgicosRESUMEN
The lymph nodes of 32 patients operated on for carcinomas of the larynx and pharynx, were evaluated for the pattern of lymph node response. Pattern 1 (predominantly lymphocytes) and pattern 2 (predominantly germinal centres) showed a fewer number of nodal metastases than pattern 3 (non-stimulated nodes). Well-differentiated carcinomas predominated in patterns 1 and 2, whereas moderately and poorly differentiated predominated in pattern 3. Patterns 1 and 2 predominated in clinical stages I-III, and pattern 3 in stage IV. The survival decreased progressively from pattern 1 to pattern 3.