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Lead Shot in the GI Tract Environmental Medicine | Case Report Intoxication from an Accidentally Ingested Lead Shot Retained in the Gastrointestinal Tract Per Gustavsson1,2 and Lars Gerhardsson 3 1Department of Occupational and Environmental Health, Stockholm Centre for Public Health, Stockholm, Sweden; 2Division of Occupational Health, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden; 3Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital, Göteborg, Sweden Figure 1 shows the development of the A 45-year-old woman was referred to the Department of Occupational and Environmental Health patient’s blood lead pattern. Blood lead levels in January 2002 because of increased blood lead concentrations of unknown origin. She suffered peaked in December 2001, and thereafter a from malaise, fatigue, and diffuse gastrointestinal symptoms. She had a blood lead level of gradual decline was evident. Beginning in 550 µg/L (normal range < 40 µg/L). The patient had not been occupationally exposed to lead, and December 2001, all analyses were performed no potential lead sources, such as food products or lead-glazed pottery, could be identified. Her by inductively coupled plasma-mass spec- food habits were normal, but she did consume game occasionally. Clinical examination, including trometry at laboratories that were accredited standard neurologic examination, was normal. No anemia was present. Laboratory tests showed for analysis of lead in blood; previous samples an increased excretion of lead in the urine, but there were no signs of microproteinuria. An (from August 2001 and 1991) were not ana- abdominal X ray in October 2002 revealed a 6-mm rounded metal object in the colon ascendens. lyzed at accredited laboratories. The DMSA Before the object could be further localized, the patient contracted winter vomiting disease treatment that had been started in 2001 was (gastroenteritis) and the metal object was spontaneously released from the colon during a diarrhea discontinued in February 2002. attack. The object was a lead shot pellet, possibly but not normally used in Sweden for hunting In January 2002, we began our investiga- wild boar or roe deer. Blood lead levels slowly decreased. Nine months later the patient’s blood tion by asking the patient about potential lead levels were almost normal (~ 70 µg/L) and her symptoms had almost completely disappeared. lead sources in her diet or in the environ- In this case, a rare source of lead exposure was found. In investigations of blood lead elevations of ment. She had no contact with lead crystal unknown origin, we recommend abdominal X ray in parallel with repeated blood lead determina- glassware or lead-glazed pottery, and her food tions. Key words: blood lead, diagnosis, gastrointestinal tract, health effects, lead shot. Environ habits were normal. The blood lead concen- Health Perspect 113:491–493 (2005). doi:10.1289/ehp.7594 available via http://dx.doi.org/ trations in the other family members were [Online 10 February 2005] normal. Her hematologic parameters and kid- ney function were normal, and she showed no signs of microproteinuria. In October A 45-year-old woman who had suffered from In August 2001 when the patient saw 2002, lead in urine was increased (75 µg/L; gastrointestinal (GI) symptoms similar to another physician, a moderately increased reference value < 30 µg/L), and an X ray of irritable bowel disease since adolescence blood lead level of 210 µg/L was found (normal the abdomen showed a dense rounded metal sought a private practitioner in 1991 when range in unexposed subjects < 40 µg/L). At that object with a diameter of approximately she suspected medical problems from amal- time, the DMSA medication was started again, 6 mm at the colon ascendens. While waiting gam dental fillings. In addition to the bowel and she was referred to the Department of for a computed tomography (CT) scan, symptoms, she suffered from fatigue. An Occupational and Environmental Health in which we planned in order to localize the analysis of the metal content in the patient’s Stockholm. A repeated blood lead sample in object more precisely, the patient contracted feces showed considerably increased concen- December 2001 showed an even higher blood the winter vomiting disease (gastroenteritis) trations of mercury, cadmium, and lead. In lead concentration of 550 µg/L. in January 2003. During severe diarrhea, the 1992 she was referred to the Department of This patient was born in Germany in 1956 object was released from the GI tract. The Occupational and Environmental Medicine and moved to Sweden in the mid-1970s. object was identified as lead shot pellet used of Huddinge Hospital, Stockholm, Sweden, During 1980–1994 she gave birth to eight for game hunting, and marks on it showed for further investigation. No source of occu- children, the last of them twins. In the early that it had been fired through a rifle. The lead pational or environmental metal exposure 1980s she worked at day care centers, and in shot pellet had a diameter of 6 mm and a was identified, and the patient showed blood 1997 she began working part-time cleaning mass of 1.7 g (Figure 2). A new abdominal concentrations of mercury and cadmium buildings. The family lived in a house built in X ray confirmed that the object was no longer within normal ranges. The patient’s blood the 1930s. She was a smoker during the 1980s in the colon. lead concentration was 100 µg/L. The refer- (except during pregnancy), but she quit smok- The woman confirmed that she had con- ence level used by the analytical laboratory at ing in the early 1990s. Her alcohol consump- sumed game at several occasions: she had eaten that time was < 145 µg/L. The analysis of tion was low, about one bottle of wine per wild boar at a restaurant in Sweden in 1993, metals in feces is considered much more month, and she did not abuse drugs. She had and hare or rabbit on some occasions during unreliable than levels in blood, and the no psychiatric problems. the 1990s, both in Sweden and in Germany. physician concluded that there was no evi- During the investigation at the Department However, she could not recall having eaten dence of environmental exposure to lead, of Occupational and Environmental Health mercury, or cadmium. Chelation therapy she reported increasing GI problems with Address correspondence to P. Gustavsson, Department with dimercaptosuccinic acid (DMSA), daily diarrhea for about a year. She also suf- of Occupational and Environmental Health, which had been initiated by the practitioner fered from coldlike symptoms in combination Norrbacka, SE-171 76 Stockholm, Sweden. in 1991, was continued for 2 years. The with malaise and fatigue several times a week. Telephone: 46-8-737 37 09. Fax: 46-8-33 43 33 patient received oral treatment two to three A clinical examination, including a standard E-mail: [email protected] The authors declare they have no competing times per week, but we do not know the exact neurologic examination (standard arm and leg financial interests. dose. Symptoms were mainly unchanged dur- reflexes, skin sensibility, and two-point dis- Received 20 September 2004; accepted 9 February ing the treatment period. crimination in hands) was normal. 2005. Environmental Health Perspectives • VOLUME 113 | NUMBER 4 | April 2005 491 Environmental Medicine | Gustavsson and Gerhardsson meat that contained a hard object at any time. radiography of the abdomen. Seven patients lead shot pellet. It is likely that the bowel Her blood lead levels in April 2003, 2 months with one or two lead shot pellets retained in symptoms were caused by the lead exposure, after the elimination of the lead shot pellet the appendix were identified. For each patient, but because the patient suffered from bowel from her colon, were still high (345 µg/L). two age- and sex-matched controls without problems earlier in life, we cannot be certain After another 7 months, the patient’s blood lead shot pellets in the appendix were selected. that the two are linked. lead concentration was 72 µg/L, almost down None of the patients with lead shot pellets had Similar blood lead patterns have been to reference levels. At that time, the attacks of blood lead levels near toxic levels, but never- observed for other individuals with retained malaise and fatigue had disappeared, and the theless their median blood lead levels were lead objects in the GI tract. An 8-year-old boy abdominal symptoms were mild. Since 2003 almost twice as high (114 µg/L vs. 60 µg/L) swallowed 20–25 fishing sinkers and a nail she has been working full-time. compared with the controls. (Mowad et al. 1998). He quickly reached a Although our patient’s blood lead level of blood lead concentration of 540 µg/L. He Discussion 100 µg/L in 1992 was within the reference recovered after whole-bowel irrigation, Lead intoxication may be caused by intake of range of the analytical laboratory, it was colonoscopy, and oral succimer treatment. food and water containing increased lead con- somewhat higher than would be expected Because children have a considerably higher centrations or by industrial exposure from among unexposed individuals (at that time lead absorption in the GI tract (30–40%) than inhalation of lead-contaminated air. The < 60 µg/L). We do not know the reason for adults (15–20%), it is especially important to absorption of ingested lead varies from 10 to this, but because the patient’s blood lead level promptly examine and diagnose children with 60% (Tsuchiya 1986), with an average was only slightly above the normal range in suspected lead objects retained in the GI tract. absorption of stable lead of 15–20% in adults 1992, it is probable that the intake of the lead Also, necessary treatment should not be (Skerfving 1993).
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