title: [Greetings from Sherlock Holmes].
abstract: Just at a time, when practical education and post-graduate training is really a permanent problem, it is necessary to pay attention again and again to the rare problems, which also appear in the doctor's office. They are by far not only "rare and useless": The recognition by the physician may be vital for the patient. Four examples from daily practice illustrate the significance of rarities in the physician's office as a permanent challenge.
authors.affiliation: FMH für Allgemeine Medizin, Interlaken.
authors.forename: B
authors.initials: B
authors.lastname: Horn
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000373:Agglutinins / Q000032:analysis; D001416:Back Pain / Q000209:etiology*; D001808:Blood Vessels / Q000002:abnormalities; D002446:Celiac Disease / Q000175:diagnosis*; D003080:Cold Temperature; D003450:Cryoglobulins; D005194:Family Practice; D006801:Humans; D008159:Lumbar Vertebrae / Q000098:blood supply*; D008286:Malabsorption Syndromes / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D010689:Phlebitis / Q000097:blood / Q000175:diagnosis*; D010787:Photosensitivity Disorders / Q000175:diagnosis* / Q000209:etiology; D010947:Plants, Toxic; D012008:Recurrence
chemical_list: D000373:Agglutinins; D003450:Cryoglobulins; C029443:cold agglutinins
vernacular_title: Sherlock Holmes lässt grüssen.