Clinical photography of a single, small nodular lesion in the submental/chin region, illustrating the cutaneous terminus of an odontogenic sinus tract. Modality: Clinical photography; technique: high-resolution frontal close-up, color-calibrated lighting, macro field to document surface contour, color, and surrounding skin. Not applicable staining or contrast. Magnification: close-up macro. Acquisition parameters: standard clinical imaging, consistent white balance. Anatomical location: on the chin, within the submental region, along the lower facial dermis; skin and subcutaneous tissue are involved; midline/central projection. Visual features: a solitary, dome-shaped, erythematous-to-flesh-colored papule approximately a few millimeters in diameter; smooth surface with possible faint crust; no obvious surrounding edema visible in this image; the lesion represents the cutaneous manifestation of a concealed dental infection, at the end of a sinus tract beneath the skin, with potential drainage. Clinical significance: indicates chronic odontogenic infection with cutaneous fistulization; supports diagnosis of odontogenic sinus tract/periapical granuloma. Differential diagnoses include sebaceous cyst, pyogenic granuloma, foreign-body granuloma, basal cell carcinoma, and other skin nodules. Correlate with dental history and radiographs (periapical/CBCT) to locate the tooth and plan root canal therapy or extraction; treat source to resolve tract. Educational use: dermatology and dentistry case illustrating cross-disciplinary diagnostics and fistula tracking.

This diagnostic image is a high-frequency (18 MHz) grayscale ultrasonography of the chin and submental region. The scan demonstrates a distinct, wide hypoechoic band (indicated by a double-headed arrow) that represents an inflamed, tortuous sinus tract. This tract originates from the deeper structures and traverses vertically through the subcutaneous tissue layers toward the skin surface. The tract terminates near the mandibular bone, marked with an asterisk, showing a direct anatomical connection between the deep osseous tissue and the superficial soft tissue. The surrounding soft tissues show heterogenous echogenicity, consistent with inflammatory changes. This visual evidence is a key diagnostic feature for an odontogenic cutaneous fistula (OCF), illustrating the pathway of chronic infection from a dental origin through the mandible to a cutaneous exit point. The image is used in medical education to teach the sonographic appearance of fistulous tracts and the importance of identifying deep dental sources in persistent cutaneous nodules of the head and neck.

A clinical photograph capturing the inferior view of a patient's submental and chin region. The image demonstrates a non-healing, extraoral draining sinus tract located centrally in the submental area. The lesion is characterized by a small, irregular cutaneous opening with evidence of active seropurulent or yellowish discharge. The immediately surrounding skin exhibits localized erythema, swelling, and hyperpigmentation, consistent with chronic inflammation. This clinical presentation is typical of an odontogenic cutaneous sinus tract, which often results from chronic periapical infections such as dental cysts or abscesses that have tracked through the mandibular bone to the skin surface. The image is a significant diagnostic example in both oral surgery and dermatology for identifying extraoral manifestations of dental pathology, such as odontogenic keratocysts or infected periapical cysts.

Imaging modality: Clinical photograph. This frontal view of the lower face documents a cutaneous lesion at the end of a dental sinus tract, i.e., an odontogenic cutaneous fistula terminating on the chin/perioral skin. The lesion is a small erythematous papule/nodule with a raised, smooth surface and subtle surrounding erythema. Minimal crust; no evident purulent drainage. Anatomically, it overlies the chin/lower face near the mandible with midline alignment; no atrophy or ulceration is evident. The photograph captures surface morphology without radiographic or histologic data, but the suggested diagnosis is a granulomatous response to a chronic dental infection, where a sinus tract drains via the skin. Clinically this finding indicates an odontogenic source rather than a primary dermatologic process. Pathologically, cutaneous granulomas associated with dental infection reflect granulomatous inflammation along the fistulous tract and may be accompanied by periapical inflammation of pulpal origin. Diagnostic significance lies in directing dental evaluation, radiographic imaging (panoramic/periapical), and source control through root canal therapy or extraction. Differential considerations include odontogenic cutaneous fistula, foreign body granuloma, and chronic dermatitis; clinical correlation with dental status is essential. Management typically requires multidisciplinary care integrating dentistry and dermatology to eradicate infection and close the sinus.

This clinical photograph, obtained via otoscopy/endoscopy, depicts a human tympanic membrane with a large central perforation. The perforation occupies a significant portion of the pars tensa, appearing as a dark, well-demarcated void that reveals the underlying middle ear space. The surrounding tympanic membrane remnant is erythematous and thickened, indicating active or chronic inflammation. The middle ear mucosa visible through the defect appears congested and reddish. Key anatomical landmarks, such as the handle of the malleus and the light reflex, are obscured or distorted due to the extensive tissue loss and inflammatory changes. This visual is characteristic of chronic suppurative otitis media (CSOM) or significant acoustic/mechanical trauma. The image serves as an educational example of middle ear pathology and the visual assessment of tympanic membrane integrity in an otolaryngology context.

This set of endoscopic otoscopy images documents the bilateral progression and resolution of otitis media. Panel A illustrates acute hemorrhagic otitis media in the right ear with white epithelial thickening and a small perforation, while the left ear shows diffuse hyperemia of the tympanic membrane (TM). Panel B demonstrates the suppurative stage in the right ear with a central TM perforation visible after debridement of purulent material; the left ear shows otitis media with effusion (OME), characterized by a retracted TM and amber-colored middle ear fluid. Panel C shows the chronic phase, with a persistent dry perforation in the right TM lacking acute inflammatory signs, and a resolving or stable state in the left ear. This clinical sequence provides a visual comparison between different stages of inflammatory middle ear disease, including acute infection, suppuration, and persistent perforation, essential for otolaryngology and pediatric diagnostic training.

This clinical photograph displays an otoscopic view of the right ear, highlighting pathological findings of the external auditory canal (EAC) and tympanic membrane. The EAC shows significant inflammatory changes, characterized by diffuse erythema and edema of the canal walls. Visible purulent secretions are present within the lumen, suggesting an active infectious process such as chronic suppurative otitis media or acute exacerbation. The tympanic membrane is clearly visualized and exhibits a single, well-defined perforation located in the anterior-inferior quadrant. The perforation appears as a dark, circular opening amidst the remaining translucent, light-reflective portions of the membrane. Normal landmarks like the handle of the malleus are obscured by the surrounding inflammatory tissue and exudate. This image serves as a clinical example of suppurative middle ear disease with associated tympanic membrane rupture and secondary external canal inflammation, relevant for otolaryngology training in diagnostic otoscopy.

This clinical otoscopic photograph of a left ear demonstrates signs of chronic otitis media (COM). The image clearly shows a large, central perforation of the tympanic membrane, appearing as a dark, circular void where the membrane should be intact. Adjacent to this perforation, there is visible mucoid discharge, which presents as a translucent, glistening, and somewhat viscous fluid resting on the membrane surface. Additionally, white, opaque areas consistent with tympanosclerotic plaques are visible on the remaining portions of the tympanic membrane, indicating previous inflammation or scarring. The external auditory canal appears mildly erythematous. This visual is characteristic of chronic suppurative otitis media, an important educational example for distinguishing types of membrane perforations and associated middle ear pathology. The presence of discharge and structural changes in the membrane are key diagnostic markers used by otorhinolaryngologists to assess disease chronicity and planning for potential tympanoplasty.