What Is Dysplastic Nevus?
Fig. 2.1 Top panel reveals junctional proliferation of melanocytes in a predominantly nested pattern characteristic of junctional nevus. Bottom panel reveals that many melanocytes are hyperchromatic and that some nevus…
What Is Psoriasiform Dermatitis?
Fig. 5.1 Biopsy from a solitary plaque of LSC reveals compact orthohyperkeratosis, marked epidermal hyperplasia, and fibrosis of the superficial dermis along with a mild lymphocytic infiltrate What Is Psoriasiform…
What Is Hypersensitivity Reaction?
Fig. 3.1 The epidermis and papillary dermis are unremarkable. The reticular dermis reveals a perivascular lymphocytic infiltrate; thus, diagnosis as hypersensitivity reaction. In this case, an extensive search for a…
Epithelial Odontogenic Tumors
(1) Department of Pathology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands KeywordsJawNeoplasmsOdontogenic tumors 3.1 Introduction Odontogenic tumors encompass a group of lesions that share a common origin from…
Fibro-Osseous Lesions
(1) Department of Pathology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands KeywordsJawSinonasal CavitiesFibro-osseous Lesion 7.1 Introduction The current classification of maxillofacial fibro-osseous lesions includes fibrous dysplasia, ossifying fibroma…
Bone Tumors
(1) Department of Pathology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands KeywordsJawBone TumorsOsteosarcomaOsteoblastoma 9.1 Introduction Bone forming tumors that occur in the jaw are osteoblastoma and osteosarcoma, both…
Odontogenic Tumors: Mixed Epithelial and Mesenchymal
(1) Department of Pathology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands KeywordsJawNeoplasmsOdontogenic tumors 5.1 Introduction Mixed odontogenic tumors are composed of both epithelial and mesenchymal tissues. These tumors…
Odontogenic Tumors: Malignant
(1) Department of Pathology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands KeywordsJawNeoplasmsOdontogenic tumors 6.1 Introduction Both odontogenic epithelium as well as odontogenic mesenchyme may show malignant neoplastic degeneration,…
Tumors of Cartilage
(1) Department of Pathology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands KeywordsMaxillofacial BonesChondroid TumorsChondrosarcomaChondromyxoid FibromaChondroblastoma 10.1 Introduction Cartilaginous tumors in the maxillofacial skeleton show the same features as…
