Cleidocranial dysplasia in a Thai cadaver.

A rare cleidocranial dysplasia or Marie-Santon syndrome1 was seen in a man who devoted his body for anatomical study of medical students in faculty of Medicine Siriraj Hospital. It was shown that there were typical bony anomalies of this disease in his body. According to his family history, he was diagnosed as cleidocranial dysplasia. Until now he had transferred these characteristics to his two next generations; two sons, one daughter and one nephew. This disorder might have a strong genetic inheritance.

Anatomic variations of the superficial part of cervical plexus and its branches in Thais.

Objective: To evaluate the variations of superficial part of cervical plexus and its branches in Thais. Methods: We dissected bilaterally in 108 cervical plexuses in Thai cadavers. The anatomic variations of origins and its cutaneous branches of the superficial part of cervical plexus were identified and recorded. Results: The superficial part of cervical plexus derived from the ventral rami of C2, C3, and C4. Its branches consisted of the lesser occipital, great auricular, transverse cervical and supraclavicular nerves. These cutaneous (or superficial) nerves mainly derived from ventral rami of C2-C3 except the supraclavicular nerve from C3-C4. They supplied the skin and superficial structures of the head, neck and shoulder. The anatomic variations of these nerves occurred in both sides. There was no statistical difference with regard to either gender or side. Conclusions: The knowledge of the anatomic variations of cutaneous branches of the superficial cervical plexus from this study could be useful for clinicians in anesthesia blocks, surgical procedures, treatment of pain and abnormalities relating to these cervical nerves.

Coracoclavicular joint: A preliminary report in Thai cadavers.

Rare anatomic variation of the coracoclavicular joint (2.34 %) was found in one male cadaver bilaterally and the left shoulder of one female cadaver from one hundred and twenty-eight shoulders in the dissecting room. The joint was an articulation between the lateral elevation of conoid tubercle and superior surface of the coracoid process. It was enclosed with a complete capsule and lined inside with a synovial membrane. Macroscopic study found that the articular surface on the conoid tubercle was hyaline cartilage and opposed to the fibrocartilagenous articular surface of the coracoid process. The pathogenesis of this joint was obscure, tracing information from their relatives found that the former was suffering from a shoulder pain and the latter had complaint neither of a shoulder pain nor any joint disease. This study is intended to draw an attention of the occurrence of this joint as it has been reportedly associated with the thoracic outlet syndrome.