Objective To study the anatomic data of the first metatarsal dorsal artery and to provide anatomical basis for clinical tissue transplantation based on the first metatarsal dorsal artery.Methods The 16 adult cadaver specimens with 32 feet were dissected and meas-ured by vernier caliper.Then the anatomic data of the first metatarsal dorsal artery were analyzed.Results Through the examinations of 32 feet sample,the first metatarsal dorsal artery were classified into 5 types.Type Ⅰ:the first metatarsal dorsal artery runs at the surface of the first dorsal interosseous muscle (13 sides,40.6%).Type Ⅱ:the first metatarsal dorsal artery runs in the interior of the first dorsal interosse-ous muscle (11sides,34.4%).Type Ⅲ:the first metatarsal dorsal artery runs underneath the first dorsal interosseous muscle (6 sides, 18.8%).Type Ⅳ:the first metatarsal dorsal artery is slender (1 side,3.1%).TypeⅤ:the first metatarsal dorsal artery is absent (1 side, 3.1%).Distance relationship was measured between the first metatarsal bone and the first metatarsal dorsal artery:the vertical distance be-tween the origin of the posterior branch of the first metatarsal dorsal artery and base of the first metatarsal bone was (2.4 ±0.3)mm,the ver-tical distance between the origin of the posterior branch of the first metatarsal dorsal artery and head of the first metatarsal bone was (10.1 ±1.0)mm;the vertical distance between the origin of the anterior branch of the first metatarsal dorsal artery and the first metatarso-phalangeal joint was (7.6 ±2.7)mm.Conclusion The first metatarsal dorsal artery has clinical reference significance for the hands and feet’s trauma and skin flap transplantation such as thumb reconstruction.

Objective:To establish a patient-derived xenograft (PDX) model of gallbladder carcinoma (GBC) and to screen mutated genes associated with GBC with the aim to provide an effective preclinical model with novel therapeutic targets for individualized patient treatment.Methods:The PDX model of GBC was established by transplantation of fresh GBC tissues from 10 patients into subcutaneous tissues of nude mice. In two of these mice, the PDX tumor tissues were stained with HE, Ki67 immunohistochemical staining and whole exome sequencing (WES). The biological characteristics of the PDX tumor tissues were compared with those of the primary donor tumors in histological structure and molecular pathology, and a high-throughput screening of tumor mutation genes was then carried out.Results:In this study, the success rate of the PDX model of GBC was 70% (7/10). The pathological and growth characteristics of PDX tumor tissues and donor tumors were basically similar. In the 2 modeled cases sequenced by WES, the same rates between the harmful mutant genes in the PDX model and primary donor tumor were 71.4% (15/21) and 65.2% (15/23), and the same genes accounted for 93.8% (15/16) and 71.4% (15/21) in the harmful mutant gene of the PDX model. The 22 mutated genes, including TP53, ABCC4 and AMPD1, were involved both in the two donor tumors, and the model tumor tissues. Ten genes including TP53 and ABCC4 were screened out and they might be closely related to development of GBC by bioinformatics analysis.Conclusions:The PDX model of GBC could effectively be used in patients with GBC in this preclinical study on individualized patient treatment. In addition, 10 mutated genes, including TP53 and ABCC4 and the like, may be used as new potential therapeutic targets for GBC.