What Is Laryngospasm?[dropcap]L[/dropcap]aryngospasm is an acute disorder of the larynx that is characterized by life-threatening spasms of the muscles of the larynx located in the throat.
Laryngospasm is a rare feature of hypocalcemia (low blood calcium level) characterized by severe alteration in nerve conduction and muscle contraction.
[dropcap]P[/dropcap]ost-cricoid carcinoma is a rare malignancy arising in the hypopharynx.
Q: What is the hypopharynx?
A: The hypopharynx is the lower portion of the pharynx that opens into the larynx. It is comprised of the postcricoid region, pyriform sinus, and posterior hypopharyngeal wall.
Tumors rarely appear in the posterior pharyngeal wall or postcricoid region without also involving the pyriform sinus. The lack of anatomic barriers between these sites and a propensity for these tumors to develop in the pyriform sinus and spread outward account for this phenomenon.
Overall prognosis for these tumors is poor. Because of the rich organic lymphatic and vascular networks, aggressive growth and early cervical metastases (compared with cancers at other head and neck sites) characterize these cancers.
A study investigating the clinical course of 21 patients with post-cricoid carcinoma found the 5-year cause-specific survival rate was 52%. All the patients who eventually died did so within 3 years of the treatment. Seven patients had distant metastases, representing a higher frequency as compared with that of patients with recurrence of the primary focus and cervical lymph node metastasis. All of these patients who had been treated by surgery died of the cancer.1
Unfortunately, hypopharyngeal cancers are discovered at a later stage than other head and neck cancers. The delay in diagnosis from symptom onset averages 10 months.2
[dropcap]C[/dropcap]ancer of the esophagus is a malignancy arising in the stratified squamous cell lining of any part of the esophagus and having a poor prognosis.
This tumor first invades the deeper layers of the esophagus which includes the layer beneath the mucosa (submucosa) and muscle before it may invade structures close to it including the aorta and trachea. Later, it may spread to organs further away such as the liver, lungs and bones.
Q: What is the stratified squamous cell lining of the esophagus?
A: Stratified squamous cells are flat epithelial cells that are composed of several layers, called the epithelium. This type of epithelium forms the surface mucosa that lines the inside of the esophagus.
The esophagus itself is a muscular tube that transports swallowed substances to the stomach. It begins at the cricoid cartilage (Adam’s apple) as a continuation of the pharynx in the throat and ends at the lower esophageal sphincter (LES).
The LES is a circular muscle surrounding the junction of the esophagus and stomach. The LES opens to allow swallowed food and liquids to enter the stomach and closes to prevent their travelling back into the esophagus.
Who is Affected in the General Population?
Esophageal cancer is the fifth leading cause of death in men from cancer worldwide.1
What Is Esophageal Small Cell Cancer (Carcinoma)?[dropcap]E[/dropcap]sophageal small cell carcinoma is a rare and aggressive malignancy arising in the esophagus with a poor prognosis.
Q: Where does the cancer occur in the esophagus?
A: Esophageal cancer can occur anywhere in the esophagus.
The esophagus is a muscular tube that transports swallowed substances to the stomach. It begins at the cricoid cartilage (Adam’s apple) as a continuation of the pharynx and ends at the lower esophageal sphincter (LES).
The LES is a circular muscle surrounding the junction of the esophagus and stomach. The LES opens to allow swallowed food and liquids to enter the stomach and closes to prevent their travelling back into the esophagus.
Dysphagia (difficulty swallowing) occurs when the inside diameter of the esophagus constricts to less than 14 millimeters. First there is difficulty swallowing solid food then liquids and saliva due to progressive growth of the cancer.
[dropcap]M[/dropcap]ultiple gastric ulcerations denote a stomach disorder that involves damage to the superficial mucosa characterized by many sores of the stomach antrum that are marked by inflammation, necrosis (death of the affected cells) and sloughing of destroyed tissue.
Q: Where is the stomach antrum?
A: The antrum is the lower region of the stomach before the pylorus which is nearest the duodenum (first part of the small intestine). The stomach and duodenum are separated by the powerful pyloric sphincter.
The stomach antrum propels food in the stomach against the pylorus which resists passage of food until it is turned into chyme. Chyme is highly acidic liquified food that has been thoroughly mixed with stomach juices.
Gastric ulcerations are typically associated with widespread gastritis (inflammation), inflammatory involvement of acid producing cells, and atrophy of acid and pepsin producing cells.1
The primary causes of gastric ulcerations are H. pylori infection, use of Aspirin and non-steroidal drugs (NSAIDS), and stress.1
[dropcap]C[/dropcap]ollagenous gastritis is a rarely reported stomach disorder characterized by the deposition of a subepithelial collagen band and accompanying inflammatory infiltrate in the stomach wall.
A subepithelial collagen band means that collagen, a tough fibrous protein, has abnormally accumulated under the surface layer of epithelial cells which form the mucosa lining the stomach.
The surface mucosa may remain intact and not show lymphocytosis and/or gastritis on endoscopic examination or it may become stripped off and bleed from entrapped capillaries. Biopsy is necessary to diagnose collagenous gastritis.1
Q: Why does collagen become deposited under the surface lining of the stomach?
A: It is thought that collagen deposition is preceded by inflammation and tissue damage. However, the natural history and pathogenesis of collagenous gastritis remain unclear.2