[Unusual cervical cyst. Adenocarcinoma ex-pleomorphic adenoma of a minor salivary gland]. / Quiste cervical inusual. adenocarcinoma ex-adenoma pleomorfo de glándula salival menor.

Cysts with an origin in a malignant tumour of the cervical region are rare. It is even more uncommon that the malignant tumour has its origin in a minor salivary gland as it is the malignant transformation of a pleomorphic adenoma. Some considerations are made regarding its localization, histopathology, diagnosis and therapeuthic attitude, as well as some advices to take into account in order to arrive to the diagnosis and correct treatment in similar cases to the one shown.

[Demonstration of sensor nervous endings in the rat thyroid gland]. / Mise en évidence de terminaisons nerveuses sensorielles dans la thyroïde du rat.

The nerve sensitive endings or receptors of the thyroid gland have been studied in twenty adult male rats. Their morphology, their acetyl-cholinesterase specific activity, their mono-amino-oxidase activity and VIP were investigated. Few but constant nerve sensitive endings were observed in the thyroid gland. These receptors were subdivided by their morphology in the next groups: pear-shaped receptors with capsule; capsuled spherical receptors located near vascular walls; ovoidal receptors with capsule and glomerular structure; simple or complex mace-shaped receptors without capsule. The acetyl-cholinesterase technique could just show a unique type or receptor, which corresponds with last one described. The mono-amino-oxidase technique can not show any type of receptors. VIP was not localized immunohistochemically in the sensitive endings of the thyroid gland.