We report on a 55 year old, internationally renowned baritone soloist who's left side of his neck was injured whilst being hit by the edge of his fellow sportsman's hand during a sportive exercise of martial arts (Karate). Ever since he suffered, in addition to severe recurrent pain in his neck, jaw and shoulder, from the inability to use the upper fifth of his formerly usable voice range: Using the other parts of his vocal spectrum took much more effort than ever before. Tones of the upper part of his formerly easily and well differentiated range were no longer stable, some of them even could not be reached at all. Thus he was unable to perform as an active singer on stage, even the ability to teach was seriously limited. The patient's past medical and surgical history was without particularly remarkable events. On thorough examination of his head and neck including videostroboscopy checking lower and higher pitches and lower and higher loudness of phonation there were no pathological morphologic and functional findings; even a larynx rotation whilst attempting to phonate a glissando upwards suggesting a malfunction of a superior laryngeal nerve leading to malfunction of a cricothyroid muscle could not be proven. On palpation of the neck we found a particularly tender region approximately in the middle of the left sternocleidomastoid muscle. The X-Ray pictures of his head, neck and upper chest did not show any bony lesions. As it's only pathological finding, a MRI scan taken 4 days after the accident revealed a hematoma, approximately 1x1x1 centimetres in size, on the medial surface of his left sternocleidomastoid muscle. This hematoma was checked using sonography in a follow up of 6 weeks, it resolved completely, so that it was no longer sonomorphologically detectible. But, despite of complete resorption of the hematoma, the problems of the singer's voice persisted. Hence we presumed a lesion of his head, neck and upper chest muscles and tendons which cannot be detected by radiomorphological methods. After being referred to our manual medicine specialist a specific diagnostic procedure was carried out. A blockade of the muscles of the thoraco-cervical transitional region including tender trigger points of the left sternocleidomastoideal, scalene and digastric muscles were detected and thus treated using soft, so called mobilizing techniques of manual therapy. The muscular dysfunction, the pain of the neck and upper chest could be substantially eased, the singer's voice did not completely return to normal yet but improved significantly. The patient ever since had been able to perform technically less ambitious rolls again, gradually further improving his vocal performance.