&NA;We report the case of a 61‐year‐old man in whom numbness developed on the right side of the penis, scrotum, and perineum after he jumped into a swimming pool. Magnetic resonance imaging and a computed tomographic scan disclosed a lesion at S1‐S2 impinging on the right S2 nerve root. At surgery, ruptured disc material originating in an area normally occupied by the fixed fibrocartilaginous plate was identified and excised. Postoperatively, the numbness resolved. We discuss a possible cause of the rupturing of the sacral disc and recommended treatment by laminectomy and excision, as in other cases of ruptured disc at other levels of the spinal column.(Neurosurgery24:271 ‐272, 1989)