[Positron emission tomography (PET) imaging in head and neck cancer].

Positron Emission Tomography (PET) with 18F-Fluordeoxyglucose is a diagnostic imaging technique very useful in the management of head and neck cancer, better than anatomic imaging in most cases. PET shows higher diagnostic accuracy in the detection of local and regional tumor recurrences. PET is also indicated for the identification of unknown primary tumors when regional nodal metastasis is the presenting feature.

[Metabolic imaging by positron emission tomography using [18F] fluorodeoxiglucose in developmental disorders].

Introduction: Developmental disorders are a common pathological condition in Neuropaediatrics and do not usually present characteristic anatomical alterations in the different neuroanatomical imaging tests that can be employed, such as computerised axial tomography or magnetic resonance (MR). Positron emission tomography (PET) using [18F] fluorodeoxiglucose (PET FDG), one of the battery of imaging tests currently available, enables us to obtain data about brain activity in a non invasive manner.

Patients And Methods: A group of 39 patients with developmental disorders from the Hospital del Mar was analysed.

[Preoperative lymphoscintigraphy to identify the sentinel lymph node in breast cancer].

Introduction: The preoperative lymphoscintigraphy to the Sentinel Node Biopsy (SNB) can reproduce the lymphatic drainage of the tumour in breast cancer.

Objectives: To establish the pattern of lymphatic drainage of the mammary tumors by means of isotopic lymphoscintigraphy and determine the factors that could influence the negativity of the scintigraphy.

Methods: 121 patients with breast cancer who were going to undergo mammary surgery were studied with SNB.

Cytogenetic study of neuroendocrine carcinoma of Merkel cells.

We describe the cytogenetic study of a neuroendocrine tumor of Merkel cells which appeared in a patient following a heart transplant. An abnormal karyotype was observed in a metastatic lymph node. The abnormality includes two markers derived from the long arm of chromosome 1, while maintaining two normal chromosomes 1.