Hill, J.
This is an aggravation case. The sole issue is succinctly stated in an instruction to which neither the claimant nor the department of labor and industries took exception:
“The sole issue for your determination is whether or not the plaintiff’s disability has increased between December 20, 1951 and June 2, 1952, as a result of his December 5, 1949 injury and, if so, to what extent. You cannot consider any increase in plaintiff’s disability, if any, which may have taken place after June 2,1952, as the Workmen’s Compensation Act provides a means by which the plaintiff can procure compensation for any such increase in disability.”
The following statement, taken from the decision and order of the board of industrial insurance appeals, is supported by the evidence:
“The claimant . . . sustained an industrial injury on December 5, 1949, while in the employ of San Poil Lumber Company, at Republic, Washington. On that date while working as a rough carpenter, the claimant was attempting to move a warehouse door with the help of several employees. The door weighed approximately nine hundred pounds and was ten and one-half feet square. The door fell upon the claimant and he was taken to a hospital. He filed an accident report with the department of labor and industries. His claim was allowed and on February 10, 1950, he was operated upon for a right inguinal hernia, which was caused by the trauma of the heavy door falling upon him. On [542]*542August 31, 1950, the supervisor of industrial insurance issued an order closing his claim with the following permanent partial disability awards: Five percent of the amount allowable for the amputation value of the left leg at the hip; five percent of the amount allowable for the amputation value of the right arm at the shoulder and five percent of the maximum allowable for unspecified permanent partial disabilities. On October 19, 1951, the claimant made application to reopen his claim on the basis of aggravation of condition. On December 20, 1951, the supervisor issued an order denying his application to reopen his claim on the basis of aggravation. This order was not appealed from. On April 1, 1952, the claimant made another application to reopen his claim on the basis of aggravation of condition. On June 2, 1952, the supervisor issued an order denying his application to reopen for aggravation. The claimant has taken timely appeal to this board from the supervisor’s last order.”
We supplement the foregoing with the following information:
Following the hernia operation on February 10, 1950, the claimant continued to “take it easy” until June 1,1950, when he began work as a janitor in a school in Republic, Washington. He quit April 14, 1951, because he “couldn’t keep up on the work on account of my feet or leg.”
He acquired and operated a restaurant from June 20,1951, until June, 1952. He gave up that business “on account of the feet and legs”: and he then “let my feet and legs rest as much as I could” until August, 1952. When he testified, in March, 1953, he was “just piece-mealing down in Wen-atchee.”
It was during the period of the restaurant operation (October 19, 1951) that he filed his first petition to reopen the claim on account of aggravation and the petition was denied (December 20,1951). It was also during that period (January, 1952) that he sprained his left ankle, a nonindustrial injury to which the department attributes the condition of his left foot and leg.
The evidence to take this case to the jury on the issue of whether there was any aggravation of the claimant’s disability between the terminal dates of the aggravation period [543]*543(December 20, 1951, and. June 2, 1952) must rest upon the testimony of Dr. Richard H. Humphreys.
Dr. Humphreys had performed the inguinal hernia operation. During Thé course of the operation, he had removed a strip of fascia (a tough membrane) from the claimant’s right hip and used it to sew up the hernia, a procedure which has been found effective in preventing the recurrence of hernias. In connection with the hernia operation and post-operative care, Dr. Humphreys saw the claimant on March 21, 1950. At that time, “the repair of the hernia was solid and well-healed and there was no abnormality of any sort.”
Dr. Humphreys next saw the claimant on September 17, 1951, at which time the claimant complained of a “sensation of hotness running down the outer side of his right leg and complained that it caused him to limp and it was generally making him uncomfortable.” The doctor “felt that there was a very definite weakness of the right thigh and very likely a protrusion of the muscles of his thigh to the defect where we removed the fascia for the purpose of repairing the hernia.” Because of the claimant’s condition on September 17, 1951, Dr. Humphreys thought that there had been such aggravation as to warrant reopening the claim, and he so advised the claimant.
An application to reopen was made, supported by Dr. Humphrey’s statement. On December 20, 1951, as we have seen, that application was denied; and the denial was not appealed from. Hence, the burden now devolves upon the claimant to prove aggravation of his disability subsequent to December 20, 1951. Karniss v. Department of Labor & Industries (1952), 39 Wn. (2d) 898, 239 P. (2d) 555. See, also, White v. Department of Labor & Industries (1956), 48 Wn. (2d) 413, 293 P. (2d) 764; Prince v. Department of Labor & Industries (1955), 47 Wn. (2d) 98, 286 P. (2d) 707; Moses v. Department of Labor & Industries (1954), 44 Wn. (2d) 511, 268 P. (2d) 665; Kleven v. Department of Labor & Industries (1952), 40 Wn. (2d) 415, 243 P. (2d) 488. It is in the proof of aggravation subsequent to December 20, 1951, that the claimant’s case is fatally weak.
[544]*544Dr. Humphreys did not see the claimant again until July 12, 1954, the day before he testified at the hearing of the board of industrial insurance appeals and some twenty-five months after the terminal date of June 2, 1952.
Relative to any increase of disability of the left leg and foot between the terminal dates, he testified that his most recent examination (July 12, 1954) showed “quite a limitation of motion in the ankle joint — a definite deformity of the heel and inability to walk without a limp. That was not present previously.” He added, in response to a further question, that he felt that “the initial degree of disability was relatively small, I would say probably five percent— probably at the present time, about twenty percent.”
To relate the doctor’s testimony of twenty per cent disability of the left leg and foot in 1954 to the terminal date of June 2,1952, this hypothetical question was propounded:
“Doctor, with that assumption that the complaints of Mr. Lyle were approximately the same with respect to the left leg on June 2, 1952. Based upon your examination in ’54, would your opinion be, what would your opinion be as to the percentage say, two years prior thereto?”
The doctor answered that it would be the same, that is, twenty per cent.
To support the assumption contained in the hypothetical question, the claimant was recalled as a witness and testified as follows:
“Q. Do you recall in June of 1952 the last time the Department closed your case? A. Yes. Q. Now your left leg was bothering you then? A. Yes. Q. And you saw Dr.
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Hill, J.
This is an aggravation case. The sole issue is succinctly stated in an instruction to which neither the claimant nor the department of labor and industries took exception:
“The sole issue for your determination is whether or not the plaintiff’s disability has increased between December 20, 1951 and June 2, 1952, as a result of his December 5, 1949 injury and, if so, to what extent. You cannot consider any increase in plaintiff’s disability, if any, which may have taken place after June 2,1952, as the Workmen’s Compensation Act provides a means by which the plaintiff can procure compensation for any such increase in disability.”
The following statement, taken from the decision and order of the board of industrial insurance appeals, is supported by the evidence:
“The claimant . . . sustained an industrial injury on December 5, 1949, while in the employ of San Poil Lumber Company, at Republic, Washington. On that date while working as a rough carpenter, the claimant was attempting to move a warehouse door with the help of several employees. The door weighed approximately nine hundred pounds and was ten and one-half feet square. The door fell upon the claimant and he was taken to a hospital. He filed an accident report with the department of labor and industries. His claim was allowed and on February 10, 1950, he was operated upon for a right inguinal hernia, which was caused by the trauma of the heavy door falling upon him. On [542]*542August 31, 1950, the supervisor of industrial insurance issued an order closing his claim with the following permanent partial disability awards: Five percent of the amount allowable for the amputation value of the left leg at the hip; five percent of the amount allowable for the amputation value of the right arm at the shoulder and five percent of the maximum allowable for unspecified permanent partial disabilities. On October 19, 1951, the claimant made application to reopen his claim on the basis of aggravation of condition. On December 20, 1951, the supervisor issued an order denying his application to reopen his claim on the basis of aggravation. This order was not appealed from. On April 1, 1952, the claimant made another application to reopen his claim on the basis of aggravation of condition. On June 2, 1952, the supervisor issued an order denying his application to reopen for aggravation. The claimant has taken timely appeal to this board from the supervisor’s last order.”
We supplement the foregoing with the following information:
Following the hernia operation on February 10, 1950, the claimant continued to “take it easy” until June 1,1950, when he began work as a janitor in a school in Republic, Washington. He quit April 14, 1951, because he “couldn’t keep up on the work on account of my feet or leg.”
He acquired and operated a restaurant from June 20,1951, until June, 1952. He gave up that business “on account of the feet and legs”: and he then “let my feet and legs rest as much as I could” until August, 1952. When he testified, in March, 1953, he was “just piece-mealing down in Wen-atchee.”
It was during the period of the restaurant operation (October 19, 1951) that he filed his first petition to reopen the claim on account of aggravation and the petition was denied (December 20,1951). It was also during that period (January, 1952) that he sprained his left ankle, a nonindustrial injury to which the department attributes the condition of his left foot and leg.
The evidence to take this case to the jury on the issue of whether there was any aggravation of the claimant’s disability between the terminal dates of the aggravation period [543]*543(December 20, 1951, and. June 2, 1952) must rest upon the testimony of Dr. Richard H. Humphreys.
Dr. Humphreys had performed the inguinal hernia operation. During Thé course of the operation, he had removed a strip of fascia (a tough membrane) from the claimant’s right hip and used it to sew up the hernia, a procedure which has been found effective in preventing the recurrence of hernias. In connection with the hernia operation and post-operative care, Dr. Humphreys saw the claimant on March 21, 1950. At that time, “the repair of the hernia was solid and well-healed and there was no abnormality of any sort.”
Dr. Humphreys next saw the claimant on September 17, 1951, at which time the claimant complained of a “sensation of hotness running down the outer side of his right leg and complained that it caused him to limp and it was generally making him uncomfortable.” The doctor “felt that there was a very definite weakness of the right thigh and very likely a protrusion of the muscles of his thigh to the defect where we removed the fascia for the purpose of repairing the hernia.” Because of the claimant’s condition on September 17, 1951, Dr. Humphreys thought that there had been such aggravation as to warrant reopening the claim, and he so advised the claimant.
An application to reopen was made, supported by Dr. Humphrey’s statement. On December 20, 1951, as we have seen, that application was denied; and the denial was not appealed from. Hence, the burden now devolves upon the claimant to prove aggravation of his disability subsequent to December 20, 1951. Karniss v. Department of Labor & Industries (1952), 39 Wn. (2d) 898, 239 P. (2d) 555. See, also, White v. Department of Labor & Industries (1956), 48 Wn. (2d) 413, 293 P. (2d) 764; Prince v. Department of Labor & Industries (1955), 47 Wn. (2d) 98, 286 P. (2d) 707; Moses v. Department of Labor & Industries (1954), 44 Wn. (2d) 511, 268 P. (2d) 665; Kleven v. Department of Labor & Industries (1952), 40 Wn. (2d) 415, 243 P. (2d) 488. It is in the proof of aggravation subsequent to December 20, 1951, that the claimant’s case is fatally weak.
[544]*544Dr. Humphreys did not see the claimant again until July 12, 1954, the day before he testified at the hearing of the board of industrial insurance appeals and some twenty-five months after the terminal date of June 2, 1952.
Relative to any increase of disability of the left leg and foot between the terminal dates, he testified that his most recent examination (July 12, 1954) showed “quite a limitation of motion in the ankle joint — a definite deformity of the heel and inability to walk without a limp. That was not present previously.” He added, in response to a further question, that he felt that “the initial degree of disability was relatively small, I would say probably five percent— probably at the present time, about twenty percent.”
To relate the doctor’s testimony of twenty per cent disability of the left leg and foot in 1954 to the terminal date of June 2,1952, this hypothetical question was propounded:
“Doctor, with that assumption that the complaints of Mr. Lyle were approximately the same with respect to the left leg on June 2, 1952. Based upon your examination in ’54, would your opinion be, what would your opinion be as to the percentage say, two years prior thereto?”
The doctor answered that it would be the same, that is, twenty per cent.
To support the assumption contained in the hypothetical question, the claimant was recalled as a witness and testified as follows:
“Q. Do you recall in June of 1952 the last time the Department closed your case? A. Yes. Q. Now your left leg was bothering you then? A. Yes. Q. And you saw Dr. Humph-reys just yesterday, is that correct? A. Yes. Q. And that same condition was bothering you when you saw Dr. Humphreys? A. Yes. . . . Q. The disability that you had in ’52, was that disability — how did that disability compare to when you saw Dr. Humphreys in 1954? A. Well, it is worse now than it was then. My leg now and foot are bothering me now more than it did in 1951 or ’52.”
It is quite apparent that the assumption that the condition of the claimant’s left leg was the same in 1952 and 1954 is not supported by the evidence; consequently, the answer to the hypothetical question has no probative value.
[545]*545Dr. Humphreys also testified that the increase of disability in the claimant’s right thigh between December, 1951, and June, 1952, was “probably from ten percent to forty percent.”
However, on cross-examination Dr. Humphreys testified that the increase in disability from ten per cent to forty per cent as to the right thigh and from five per cent to twenty per cent in the left leg and foot had developed between the time of the operation in Í950 and the examination on September 17,1951. He was most emphatic that there had been aggravation, particularly as to the right thigh, prior to the latter date, which preceded the first petition to reopen for aggravation. When asked in cross-examination whether it was impossible for him to say what the claimant’s condition was in June, 1952, Dr. Humphreys answered:
“No, that is not quite true. I wouldn’t say that was true because if the man were in my office in September 17, 1951, as he was, complaining of pain and sensations of increased nerve irritability in the leg as he had, and if I detected, as I did, a hernia through the fascia, certainly there would be no reason to suspect his condition would be anything but the same or worse in June of 1952.”
The foregoing is as strong a statement as he could be induced to make on cross-examination or redirect examination regarding the claimant’s condition subsequent to September 17,1951.
The claimant insists that Dr. Humphrey’s testimony on cross-examination was no more than a contradiction of his direct testimony and that, while it may have been impeaching, it did not destroy the effect of his direct testimony and so left a question for the jury. In support thereof, the claimant cites Halder v. Department of Labor & Industries (1954), 44 Wn. (2d) 537, 268 P. (2d) 1020.
We cannot agree. The doctor’s testimony on cross-examination was in effect a retraction of his direct testimony as to there having been any measurable increase in disability between December, 1951, and June, 1952.
There having been no evidence to take the case to the jury, it follows that the department’s motion to dismiss [546]*546should have been granted or that, in any event, its motion for judgment notwithstanding the verdict should have been granted.
Judgment reversed, with instruction to dismiss the claim-want’s .appeal from the order of the board of industrial insurance appeals.
Donworth, C. J., Schwellenbach, Weaver, and Ott, JJ., concur.