This paper examines the application of the acryl plastic injection to the preparation of vascular corrosion microcasts for scanning electron microscopy (SEM). The original injection method using acryl plastic was described by Taniguchi, Ohta et al. in 1952 and 1955, under the title of "New improved method for injection of acrylic resin". Three dimensional observations were undertaken in our laboratory on the angiology at the macro- and microscopic levels of various organs from various mammals employing the original method. Based on this extensive experience, an injection method for preparing corrosion microcasts for use in SEM was devised in our laboratory. Microcasts prepared by the present method were able to demonstrate the fine vascular architecture of each organ. In general, although applications for preparing vascular microcasts of isolated and parenchymal organs are not so difficult, the method can be used to be applicable for demonstrating the fine vascular architecture related to or within hard tissues, as well as for investigating the morphological relations between changes of vascular patterns and restorative changes in the surrounding tissues affected by experimental operations. SEM microphotographs are also presented to illustrate actual practical applications.

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Summary: A rare anomaly, in which the left common carotid directly gave rise to the superior thyroid, the lingual, the facial and the ascending pharyngeal arteries and divided into the external and internal carotid arteries at a high level, was found in a 52-year-old Japanese male among cadavers for student dissection. The occipital artery in this case arose from the internal carotid.

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We report a case of dorsal subluxation of the first metatarsophalangeal joint without dislocation of the sesamoids or destruction of the sesamoid complex. Closed reduction was unsuccessful. At surgery, the subluxation was found to be associated with locking of the abductor hallucis tendon onto the medial condyle of the metatarsal. After restoration of the tendon to its normal anatomic alignment, the joint was successfully reduced. One year after the injury, the patient was asymptomatic and had full range of motion of the metatarsophalangeal joint.