In study provided by you, it is stated at the end
"Further studies in a larger number of patients are needed in order to support this finding."
So, in other, later studies...
J Urol. 1977 Dec;118(6):1019-21.
"Selective adrenal vein catheterization was done on intact and castrated men with prostatic carcinoma. Adrenal to peripheral venous testosterone gradients were observed in all patients, indicating adrenal production of this hormone. No compensatory adrenal production of testosterone was noted during a 17-month period after orchiectomy."
Prostate. 1982;3(2):115-21.
"This study, performed on 40 patients having undergone bilateral subcapsular orchiectomy for prostatic carcinoma, shows that this intervention results in testosterone levels in the female range and that during the year following subcapsular orchiectomy there is no evidence for reactivation of Leydig cells or for increased adrenal androgen secretion as evaluated from plasma testosterone, androstenedione, and dehydroepiandrosterone sulphate levels. In patients treated with estrogens we found no evidence for stimulation of adrenal androgen secretion, whereas in neither group of patients with prostatic carcinoma we found evidence for increased androgen levels at the time of recurrence of the carcinoma."
Urol Int. 1990;45(3):160-3.
"Basal serum levels and ACTH-induced increments ('delta-values') of dehydroepiandrosterone (DHA) and its sulfate (DHAS), 4-androstene-3,17-dione (A-4), 17 alpha-hydroxyprogesterone (17-OHP), cortisol and testosterone and serum albumin levels were studied in patients with prostatic cancer before treatment and after orchidectomy or during estrogen treatment (intramuscular polyestradiol phosphate during the first 3 months, followed by another 3 months with additional oral ethinyl estradiol). Orchidectomy as well as single drug intramuscular or oral + intramuscular estrogens exerted a similar suppressive effect on basal levels of A-4 and 17-OHP."
Prostate. 1989;14(2):177-82.
"Both estrogen treatment regimens were as effective as orchidectomy in reducing circulating levels of T and A-4. Orchidectomy caused a slight decrease in DHAS levels."
Urol Res. 1989;17(2):95-8.
"Serum levels of testosterone (T), 17 alpha-hydroxyprogesterone (17OHP), 4-androstene-3,17-dione (A-4), dehydroepiandrosterone (DHA), dehydroepiandrosterone sulfate (DHAS) and cortisol were measured before and after 6 months of treatment in prostatic cancer patients treated by orchidectomy (ORX) or with oral + parenteral estrogens (OE), single parenteral estrogens (...), estramustine phosphate (ECYT) or LHRH agonist without (LHRH) or with (LHRH-F) flutamide. Castration values of T and 170HP were reached in all types of treatment (PE at the higher dose).
Int J Androl. 1987 Aug;10(4):581-7.
"Orchidectomy caused a pronounced decrease in 17-OHP levels and minor but significant decreases in the levels of A-4 and DHAS."
"The results further invalidate the hypothesis that there is a 'compensatory' increase in adrenal androgen output following orchidectomy."
In full study...
"Although increased urinary excretion of androgens has been reported after
orchidectomy in several earlier studies (Parker et al., 1984), unchanged or slightly
decreased blood levels of DHA, DHAS and A-4 were reported in more recent
investigations (Luukkarinen et al., 1977; Vermeulen et al., 1982a; Parker ef al.,
1984; Belanger ef al., 1984; Belanger, Brochu & Cliche, 1986). With respect to
oestrogen treatment, modest doses of polyoestradiol phosphate or oestradiol undecylate
administered intramuscularly are reported to cause a slight decrease in A-4
and a slightly decreased, or unchanged, level of DHAS, while the levels of DHA
remained unchanged (Jonsson et al., 1975; Luukkarinen et al., 1977; Leinonen ef
al., 1981; Vermeulen et al., 1982a; Schurmeyer et al., 1986). A dose-dependent
decrease in DHAS levels has also been observed in postmenopausal women during
oral oestrogen replacement therapy (Helgason et al., 1981)."