Definition and Classification - Sialolithiasis refers to the formation of calculi within a salivary gland. - Calculi are hard, stone-like concretions made from mineral salts. - Tonsiloliths and renal calculi are other types of calculi. - Sialolithiasis can cause painful swelling and inflammation of the gland. - Obstructive salivary gland disease can also lead to the mealtime syndrome.

Signs and Symptoms - Intermittent pain that worsens before mealtimes. - Swelling of the gland, often appearing or increasing before mealtimes. - Tenderness of the involved gland. - Palpable hard lump near the end of the duct. - Lack of saliva coming from the duct.

Causes - Abnormalities in calcium metabolism, dehydration, and reduced salivary flow rate can contribute to lithogenesis. - The formation of a calcified mass involves the layering of organic and inorganic material. - Food debris, bacteria, or foreign bodies can enter the ducts and be trapped by abnormalities in the sphincter mechanism. - Stone formation is more common in the submandibular gland due to higher calcium concentration and slower saliva flow. - Salivary calculi are associated with chronic sialadenitis and can be composed of uric acid crystals in cases of gout.

Diagnosis - Diagnosis is usually based on the patient's history and physical examination. - X-ray can confirm the presence of salivary gland calculi in 80% of cases. - Ultrasound imaging can be used to visualize sialolithiasis. - Inflammation and dilation of the duct can be observed in imaging. - Other diagnostic techniques include sialography and CT scans.

Management and Epidemiology - The stone is usually removed to manage sialolithiasis. - Different techniques are available for stone removal. - In rare cases of recurrent stone formation, removal of the submandibular gland may be necessary. - Non-invasive options for small stones include hydration, moist heat therapy, NSAIDs, and consuming bitter or sour foods. - Citrus fruits like lemon or orange may increase salivation and promote stone expulsion. - Shock wave therapy (Extracorporeal shock wave lithotripsy) is another treatment option. - Minimally invasive treatment includes sialendoscopy. - Surgical options include cannulating the duct to remove the stone (sialectomy) or making a small incision near the stone for removal. - In cases of recurring stones, the salivary duct may be removed. - Antibiotics may be used to prevent infection while the stone is lodged in the duct. - The prevalence of salivary stones in the general population is about 1.2%. - Salivary stones causing symptoms occur in about 0.45% of the general population. - Sialolithiasis accounts for 50% of all diseases in major salivary glands. - It also represents 66% of all obstructive salivary gland diseases. - Salivary gland stones are twice as common in males compared to females. - The most common age range for salivary stones is between 30 and 60. - Salivary stones are uncommon in children.