Poikilocytosis in cancer patients.

The incidence of poikilocytosis in 100 patients with cancer of various organ systems was found to be 12 per cent. Poikilocytosis was more frequently seen in patients with adenocarcinoma of the gastrointestinal tract and with inoperable metastatic carcinoma than in patients with other malignant lesions. Anemia was associated in three cases, but in nine instances the patient was not significantly anemic at admission. Two of these patients may have been dehydrated. Uremia was not a factor in any of the cases. Fifty per cent of the patients exhibiting poikilocytosis died or were in a terminal condition within one month after the observation was made, as compared with 21 per cent of the patients who did not have evidence of poikilocytosis. These findings show that poikilocytosis may occur in cancer patients without anemia or uremia; and they indicate that its presence is an unfavorable prognosis sign.