Related Experiment Video
Updated: May 4, 2026
07:00
Identification of OTX1 and OTX2 As Two Possible Molecular Markers for Sinonasal Carcinomas and Olfactory Neuroblastomas
Published on: February 28, 2019
5.3K
Keratoacanthoma: an unusual nasal mass
M S Sazafi1, H Salina1, A Asma1
1Department of Otorhinolaryngology-Head & Neck Surgery, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia;
Summary
A rare keratoacanthoma case occurred in a non-sun-exposed nasal vestibule. This finding highlights the importance of ruling out malignancy in elderly patients with nasal masses.
Area of Science:
- Dermatology
- Otolaryngology
- Pathology
Background:
- Keratoacanthoma is a common, rapidly growing skin tumor, typically sun-induced.
- Nasal vestibular involvement is uncommon, especially in non-sun-exposed areas.
Observation:
- An 84-year-old male presented with an 8-month history of a progressively growing left nasal mass.
- Physical examination revealed a non-tender, protruding mass on the medial vestibular wall of the left nostril.
Findings:
- Histopathological examination confirmed the mass as a keratoacanthoma.
- This represents a rare occurrence of keratoacanthoma in a non-sun-exposed nasal vestibule.
Implications:
- Prompt evaluation and histopathological diagnosis are crucial for nasal masses in the elderly to exclude malignancy.
- This case adds to the limited literature on nasal vestibular keratoacanthoma, emphasizing the need for awareness in differential diagnoses.
Related Concept Videos
01:24Nose and Nasal Cavity
16.9K
The nose is composed of an observable exterior segment (external nose) and an internal segment within the skull known as the nasal cavity (internal nose). The external nose, visible on the face, consists of a framework of bone and hyaline cartilage enveloped in skin and muscle and lined with a mucous membrane. This structure is supported by the frontal bone, nasal bones, and maxillary bone and is supplemented by a cartilaginous framework comprising the septal nasal cartilage, lateral nasal...
16.9K
01:03Olfactory Receptors: Location and Structure
10.5K
The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
10.5K
01:14Atypical Pneumonia
84
Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease...
84
01:29Anatomy of Respiratory System I: Upper Respiratory Tract
6.9K
The upper respiratory tract plays a vital role in the respiratory system, comprising several structures that facilitate air intake and prepare air for the lungs. It also serves as the first line of defense against pathogens and particles. This tract includes the nose and nasal cavity, the oral cavity, the paranasal sinuses, and the pharynx, each with specific functions and features.
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract....
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract....
6.9K
01:30Skin Cancer
5.2K
Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
5.2K
01:30Epistaxis
857
Epistaxis, or nosebleeds, occurs when small, swollen blood vessels in the nasal mucous membrane rupture. Typically, the anterior septum is the primary site of occurrence.
Etiology
Possible causes of this condition include high blood pressure, trauma, low humidity, upper respiratory tract infections, allergies, foreign bodies, nasal inhalation of corticosteroids or illicit drugs, excessive use of decongestant nasal sprays, facial or nasal surgery, anatomic malformation, tumors, or systemic...
Etiology
Possible causes of this condition include high blood pressure, trauma, low humidity, upper respiratory tract infections, allergies, foreign bodies, nasal inhalation of corticosteroids or illicit drugs, excessive use of decongestant nasal sprays, facial or nasal surgery, anatomic malformation, tumors, or systemic...
857