Deep Cervical cellulitis is one of the most severe ENT emergencies, requiring immediate management by a multidisciplinary team. Often due to a benign pharyngeal or dental infection, this life-threatening condition leads to extensive necrosis spreading along the fascia of the neck, possibly to the mediastinum. This article reports two cases of deep neck infection, one of which had severe thoracic complications, with septic shock and multiorgan failure.