Thyroid operations are advised for the patients who have variety of thyroid conditions, including both cancerous and benign thyroid nodules, large thyroid glands (goiter) and overactive thyroid glands. There are several thyroid operations that surgeon may perform, including Excisional boipsy-removal a small part of thyroid gland. (rarely used today) Lobectomy-removing half of thyroid gland. Removing nearly all thyroid gland (subtotal thyroidectomy) Total thyroidectomy, which removes all identible thyroid tissue. There are specific indications of each of these operations. The main risk of thyroid operations involve possible damage to important structure near thyroid, primarly the parathyroid glands and recurrent and external laryngeal nerves (which control the vocal cords)

There are three major salivary glands parotid gland, submandibular gland and sublingual gland. Submandibular gland is the second largest salivary gland among the major salivary gland. Anatomically, located in submandibular triangle of neck. The gland is divided into two lobes depending on its relation to mylohyoid muscle, superficial lying superficial to muscle and deep lying deep to muscle. Two lobes are continuous with each other, forming ‘U’ shaped around the posterior of mylohyoid muscle. It lies partly below mandible and partly in submandibular triangle. The submandibular gland duct is also known as Wharton’s duct, exits the gland from deep lobe, passing through the floor of mouth and opening in sublingual region. Function of submandibular gland include lubrication and enzymatic degradation of food substances and production of hormones. Saliva is produced in glandular subunit. The saliva secreted by submandibular glands account for 70% of salivary volume. The saliva secreted by the submandibular glands is a bit thicker than that produced by other salivary glands, and can, as a result, sometimes form little stones in the salivary glands and their ducts. When submandibular gland is affected there is swelling in submandibular region. It may be associated with pain, fever or purulent discharge into the mouth. The swelling of submadibular gland can be due to Bacterial infection which can be treated with antibiotics and analgesics. Stones (most commonly present with swelling of gland due to accumulation of crystallized saliva deposits) lodged in Wharton’s duct or is large or is lodged far back in duct or in gland itself are treated by excision of gland. Malignancies of submandibular glands can be treated by surgical excision of gland.

Parotid gland is largest salivary gland. It situated below external auditory meatus and in front of temperomandibular joint. It produces saliva which keeps the oral cavity moist. Parotid gland disease can be due to infection, tumor or obstruction to parotid duct. Infection can due to viral (mumps) or bacterial (acute or chronic parotitis) and obstruction to parotid duct can be due to stone, stricture or stenoses. They usually present with swelling in preauricular region which may increase or decrease in size after food intake, fever, pain. Treatment includes antibiotic, pain killers or anti-inflammatory drugs. In case of It can be treated with antibiotics, analgesics & anti-inflammatory drugs. Chronic parotitis can also be due to stone, stricture, or stenosis which can be treated with helpof sialoendoscopy by removal of stone and dialatation of stricture. It can be diagnosed withultrasonography, sometimes computed tomography or magnetic resonance sialography maybe required. Parotid tumours can be present with painless parotid swelling which can be treated with surgery like complete or partial removal of gland. Diagnosis is confirmed by Ultrasonography, or Computed tomography scan. Sometimes surgery can lead to complication like facial weakness.