Carcinoid tumour occurs in the hormone-producing cells of the gastrointestinal organs. It produces a set of symptoms referred to as carcinoid syndrome.
Cluster headaches produce severe pain on one side of the head. Sufferers typically experience a cluster of headaches followed by a period of no headaches.
Lambert-Eaton syndrome affects the muscles and autonomic nervous system. It is characterised by muscle weakness that improves with continued contraction.
Allergic bronchopulmonary aspergillosis is an allergic disease affecting asthmatics. It occurs due to fungal infection of the airways with Aspergillus.