This study examined the branchial, renal and blood acid-base responses of a marine teleost to intravascular infusion of mineral acid (HCl at 1000 mu-equiv/kg). In all animals the renal response was insignificant for at least 3 days following infusion. Two types of branchial and blood acid-base response were seen. Either the infused load disappeared rapidly from the extracellular into the intrac...

irst branchial cleft anomalies account for 8--10%1,2 of all ranchial cleft defects, representing approximately 17% of ll pediatric cervical masses. The low incidence and the arious clinical presentations of these congenital malformaions of the branchial apparatus make the diagnosis difficult ven for the experimented otolaryngologist. Depending on he type of the anomaly (fistula, sinus or cyst),...

Chondrichthyans (sharks, skates, rays and holocephalans) possess paired appendages that project laterally from their gill arches, known as branchial rays. This led Carl Gegenbaur to propose that paired fins (and hence tetrapod limbs) originally evolved via transformation of gill arches. Tetrapod limbs are patterned by asonic hedgehog(Shh)-expressing signalling centre known as the zone of polari...

The isolated, perfused head of the dogfish 'pup' (Squalus acanthias) maintained pressure:flow relationships near to those described for the in vivo adult for at least 3 h when perfused at a constant rate. The addition of 3% polyvinylpyrrolidone reversibly increased branchial resistance, and the postbranchial outflow (arterial + venous) equalled the inflow. 10(-5) M adrenaline reversibly reduced...

1. Department of Radiology, Kennemer Gasthuis, Haarlem, The Netherlands, 2. Department of Radiology, Academic Medical Center, Amsterdam, The Netherlands Background: An 8-year-old boy was admitted to the pediatric department with two small lumps a few centimeters above the clavicles, medial from the mid-clavicular line, in a symmetrical arrangement (Fig. 1). Sometimes fluid was leaking out of th...

A 15-year-old girl presented with a cystic swelling since birth behind the ramus of the right mandible and diagnosed clinically as a dermoid cyst. Surgical exploration, however, showed that it was closely related to the external auditory canal, with an extension running medially behind the parotid gland and ending in the bony middle ear. The facial nerve was closely related to the deep part of ...

We present an unusual case of a 20-year-old woman with a left-sided infected branchial cyst causing an ipsilateral 12th nerve palsy. This resolved upon excision of the cyst. Branchial cysts, infected or otherwise, should be high in the differential of a lateral cystic neck mass. This and other cases discussed demonstrate that the presence of cranial nerve palsies does not necessarily indicate a...

This report documents 2 cases of branchioblastomas in koi carp (Cyprinus carpio). Macroscopically, both cases were characterized by well-demarcated, pale red nodular masses located at the left first branchial arch and the right pseudobranch, respectively. Histologically, the neoplasias were composed of blast-like cells that differentiated into cartilage and branchial lamellae embedded in abunda...

Thyroglossal duct cysts followed by branchial cleft anomalies are the most common congenital neck masses encountered in practice, second branchial cleft cysts and sinuses are the most common type (LaRiviere and Waldhausen in Surg Clin North Am 92(3):583-597, 2012). Although both abnormalities are common individually, but rarely seen associated in same patient as described in our case. Congenita...

The diagnosis of branchiogenic carcinoma is one of significant controversies in the field of head and neck oncology. Those who support its existence adhere to rigid criteria to validate its existence. Those that deny it, purport that the entity is simply metastatic disease masquerading as a branchial cleft primary. One aspect of agreement between the two opposing views is that a separate head a...