Related Experiment Video
Updated: May 22, 2026

06:15
Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
Published on: August 9, 2024
[Perforating and ruptured trichilemmal cyst with metaplastic ossification].
M Bär1, D M Kayser, M Trniková
1Facharzt für Haut- & Geschlechtskrankheiten/Dermatohistologie, Hautarztpraxis Dr. Bär, Löbauer Str. 17, 02625, Bautzen, Deutschland. info@hautarztpraxis-baer.de
Der Pathologe
|May 8, 2012
Summary
Multiple scalp lesions, known as trichilemmal cysts, can be hereditary. Metaplastic ossification is a rare finding in these cysts, potentially linked to prior rupture events.
Area of Science:
- Dermatopathology
- Histopathology
Background:
- Trichilemmal cysts are common benign adnexal neoplasms of the skin.
- They typically present as multiple lesions on the scalp and can have a familial predisposition.
Observation:
- Metaplastic ossification is a rare phenomenon in trichilemmal cysts.
- This finding has been observed in various pathological conditions, including trauma, inflammation, and neoplasms.
Findings:
- The study highlights the extreme rarity of metaplastic ossification within trichilemmal cysts.
- Evidence suggests a potential association between metaplastic ossification and previous cyst rupture.
Implications:
- Understanding this rare finding contributes to the differential diagnosis of scalp lesions.
- Further research may elucidate the precise mechanisms linking cyst rupture to ossification in trichilemmal cysts.
Related Concept Videos
Esophageal Perforation-I: Introduction
Esophageal perforation is a severe medical condition characterized by a breach in the integrity of the esophageal wall. This breach can occur due to various factors such as trauma, medical procedures, or underlying diseases. When the esophageal wall is compromised, it allows food, fluids, and digestive juices into the chest cavity or adjacent structures, leading to potential complications and health risks.
The location of esophageal perforation can vary, occurring anywhere along the esophagus.
The location of esophageal perforation can vary, occurring anywhere along the esophagus.
Appendicitis
Appendicitis is an acute inflammatory condition of the vermiform appendix, most commonly caused by obstruction of its lumen. The appendix is a narrow, blind-ended pouch that extends from the cecum, making it particularly prone to obstruction. Causes include fecaliths, lymphoid hyperplasia (often after viral infections), parasites, tumors, or foreign bodies. This obstruction initiates a cascade of pathological changes.Luminal Obstruction and Early InflammationAfter obstruction, normal mucosal...
Esophageal Perforation-II: Clinical Manifestations and Management
Esophageal perforations manifest in various clinical forms, influenced by factors such as the perforation's cause and location (cervical, intrathoracic, or intra-abdominal), the extent of contamination, and potential injury to adjacent mediastinal structures. The timing between the perforation occurrence and treatment initiation also affects the clinical presentation.
Clinical Manifestations:
Clinical Manifestations:
