Respiratory System (J00-J99)
- Retention cyst (cyst due to outflow obstruction of a gland) of the maxillary sinus [DD: Missing compactal lamella as cyst boundary].
Musculoskeletal system and connective tissue (M00-M99).
- Focal osteoporotic (focal bone loss) bone marrow defect [DD: absent bone trabeculae].
- Well demarcated bone marrow island (physiological findings).
Mouth, esophagus (esophagus), stomach, and intestines (K00-K67; K90-K93).
- Disorders of tooth development and eruption (K00).
- Follicular (“belonging to a follicle”) cyst [DD between radicular cyst of deciduous tooth and follicular cyst of permanent tooth not possible in absence of pericoronary space demarcation]
- Other diseases of the dental hard tissues (K03).
- Periapical (“around the root apex”) cementum dysplasia stage 1 [DD: teeth vital, no limitation of lesion by corticalis/bone compacta].
- Diseases of the pulp and periapical tissues (K04).
- Periapical/apical granuloma/root granuloma/chronic apical periodontitis [DD: Only when the periapical lightening is 6 to 8 mm or the lesion area exceeds 2 cm² is a radicular (“root concerning”) cyst to be assumed].
- Periapical abscess
- Radicular cyst
- Apical (“tooth rootward”; periodontal/periodontal related).
- Lateral (laterally)
- Periapical (“around the root tip”)
- Residual (“to remain as a residue”).
- Radicular
- Cysts of the oral region, not elsewhere classified (K09).
- Non-odontogenic (“not belonging to the teeth”) cysts.
- Nasopalatinal cyst (maxillary dentes incisivi/incisors).
- Globulomaxillary cyst
- Lateral periodontal cyst [DD: preserved vitality of the tooth].
- Primordial cyst/keratocyst
- Solitary bone cyst [DD: vital tooth, periodontal gap demarcable without transition into cyst lumen].
- Non-odontogenic (“not belonging to the teeth”) cysts.
Neoplasms – tumor diseases (C00-D48).
- Carcinoma metastasis (daughter tumors based on malignant disease).
- Keratocystic odontogenic tumor (KCOT) [DD: unlikely in the absence of periodontal cleft demarcation].
- Jaw dysplasia
- Osteolytic tumors (tumors that lead to bone loss).
- Plasmocytoma
- Eosinophilic granuloma
- Bone hemangioma
- Osteoblastoma
- Giant cell granuloma
- Et al.
- Cystic ameloblastoma
Injuries, poisonings and other consequences of external causes (S00-T98).
- Postoperative bone defects [DD: anamnestic root tip resection, cyst surgery, removal of an osteosynthesis screw].