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Case of the month. Thoracic outlet syndrome—A functional disturbance of the thoracic upper aperture?

We describe a young woman with typical neurovascular symptoms of thoracic outlet syndrome (TOS). A three‐dimensional computerized scan showed a “dislocation” of the first rib at the costotransverse joint. The patient responded to a conservative approach to treatment. The patient presented here demonstrates the functional compromise of the upper thoracic aperture that is frequently seen in young women. © 1995 John Wiley &Sons, Inc. © 1995 John Wiley & Sons, Inc.