<prompt> Ring sequestrum is seen in?Typhoid osteomyelitisChronic osteomyelitisAmputation stumpTuberculosis osteomyelitis  <response>: Excessive periosteal stripping is contraindicated as it may result in formation of ring sequestrum in amputation stump. Type of sequestrum Found In Ring sequestrum Amputation stump Around pin tracts external fixator Tubular sequestrum Hematogenous osteomyelitis Segmental fractures middle segment Rice grain sequestrum Tuberculosis Ref: Campbells operative Ohopaedics 10e, page 544. 