Related Experiment Video
Updated: Jun 6, 2026

Robot-Assisted Transcanal Endoscopic Ear Surgery for Congenital Cholesteatoma
Published on: December 15, 2023
Cystic panfolliculoma of the conchal bowl
John Monroe1, Lindsey J Gaghan2, John Kawaoka2
1Norton College of Medicine, Upstate Medical University, Syracuse, NY, USA.
Abstract:
Panfolliculomas are rare, benign follicular neoplasms showing differentiation toward all components of the hair follicle. Cystic panfolliculoma (CPF), a histologic variant, is uniquely characterized by epidermal invagination. This lesion is uncommon, with fewer than 25 cases reported in the literature. Clinically and histologically, it can mimic other tumors, including basal cell carcinoma and trichoblastoma, complicating diagnosis. We describe a case of CPF arising in the right conchal bowl of an 84-year-old man, along with a brief review of similar cases.
Related Concept Videos
Cryptococcal Meningitis
Cystic Fibrosis: Pathogenesis
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation, but...
Cranial Bones: Lateral View
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
