Squamous Cell Carcinoma (SCC) of the Tongue: This is the most common type of cancer affecting the tongue, and its presentation with stridor suggests an advanced stage where the tumor has grown large enough to obstruct the airway or has invaded nearby structures, causing respiratory distress.

Adenocarcinoma of the Tongue: Although less common than SCC, adenocarcinoma can also present with significant growth and invasion, potentially causing stridor.
Lymphoma of the Tongue: Lymphomas can occur in the tongue and, depending on their aggressiveness and location, might cause significant swelling or obstruction leading to stridor.
Salivary Gland Tumors: Tumors originating from the salivary glands in the tongue, such as mucoepidermoid carcinoma or adenoid cystic carcinoma, could potentially grow large enough to cause airway obstruction.

Infectious Causes (e.g., Abscess): An abscess or severe infection in the tongue or neck could cause rapid swelling, leading to airway obstruction and stridor. These conditions are medical emergencies requiring prompt intervention.
Angioedema: Although rare, angioedema of the tongue can cause significant swelling and airway obstruction, presenting with stridor. It is crucial to identify and treat this condition quickly.

Kaposi's Sarcoma: In immunocompromised patients, Kaposi's sarcoma can manifest in the oral cavity, including the tongue, and potentially cause obstructive symptoms.
Melanoma of the Tongue: Although rare, melanoma can occur in the tongue and, depending on its location and growth pattern, might cause stridor if it obstructs the airway.
Granular Cell Tumor: Typically benign, but in rare cases, a granular cell tumor of the tongue could grow large enough to cause airway obstruction.