Biomedical subjects
M Hollands
Publications and source records attributed to M Hollands.
Primary pancreatic tuberculosis: presentation and diagnosis.
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Use of spiral and non-spiral computed tomography arterial portography in the detection of potentially malignant liver masses.
The present study assesses the usefulness of computed tomography (CT) arterial portography (CTAP) in detecting and defining the number and anatomy of potentially malignant liver lesions. One hundred and one adults studied in 1993 and 1994 were retrospectively reviewed, including patients with primary or secondary tumours for possible resection and patients with non-hepatic malignancies in whom the detection of liver metastases would preclude surgery. Twenty-three patients underwent non-spiral CT studies and 78 had studies on a spiral unit, with 22 of these having single phase and 56 having dual phase studies to overcome artefact problems. The relationship between lesion size and detection sensitivity is critical. On non-spiral studies, the overall lesion detection sensitivity and positive predictive value was 69 and 90%, respectively. Detection sensitivity was 100 and 20% for lesions > 1 cm and < 1 cm, respectively. On single phase spiral CTAP the overall detection sensitivity and positive predictive value was 80 and 66%, respectively. Detection sensitivity for lesions > 1 cm and < 1 cm was 100 and 0%, respectively. On dual phase spiral CTAP the overall detection sensitivity and positive predictive value was 76 and 71%, respectively. For lesions > 1 cm and < 1 cm the sensitivity was 81 and 55%, respectively. Eighteen patients with non-hepatic malignancies with unsuspected metastatic spread did not proceed to major surgery because of liver metastases detected on CTAP. Perfusion artefacts occurred in 30 and 64% of non-spiral and of initial portal venous spiral CTAP studies, respectively. By using the double-phase technique, these artefacts were substantially diminished. In conclusion, CTAP is a valuable tool for assessing the presence, site and size of possible liver tumours and confers a benefit even when previous ultrasound and conventional CT have already been used. In addition, CTAP has a lower limit of useful resolution of approximately 1 cm. Perfusion artefacts can be reduced by a dual phase protocol.
Symptom relief and survival after chemo-embolization with adriamycin, lipiodol and gelfoam for hepatocellular carcinoma.
This is a retrospective study to evaluate the ability of arterial chemo-embolization with Adriamycin, Lipiodol and Gelfoam to relieve symptoms, primarily abdominal pain, and to prolong survival in patients with hepatocellular carcinoma. Twenty patients were referred from 1986 to 1991 and in 18 the chemo-embolization procedure was successful. In the follow-up period to March 1992, 17 patients had died. Their survival times were not found to be significantly different from the reported rates of survival in patients given no therapy. In only one of 10 patients followed with computed tomography was a reduction in tumour size seen. Nine of 11 patients with pain reported significant relief from pain following treatment. Six patients had repeat embolizations that successfully relieved recurrent pain. In the authors' experience chemo-embolization was helpful in relieving pain, but did not prolong life.
The effects of partial hepatectomy on serum sex steroids in humans.
In both rats and humans, partial hepatectomy results in a substantial increase in serum estradiol concentrations. Because mammalian liver of both sexes contains estrogen receptor, it has been suggested that this surge in serum estrogen concentration may initiate or facilitate liver regeneration. We have reexamined the potential role of sex steroids in human liver regeneration by measuring serum estradiol and testosterone concentrations in men and postmenopausal women before and after hepatic resection. The results were compared with those obtained in patients subjected to other forms of major surgery. In both men and postmenopausal women, serum estradiol levels increased after partial hepatectomy. However, the magnitude of increase was not related to the amount of liver removed. Moreover, similar increases occurred in patients undergoing other major surgical procedures not involving the liver. Serum testosterone concentrations decreased in men and increased in postmenopausal women undergoing all forms of surgery. It is concluded that effects of partial hepatectomy on serum sex steroid levels are nonspecific and probably related to stress. These observations diminish the likelihood that such changes are an important factor in the control of liver regeneration in humans.
Metabolic advantages of spreading the nutrient load: effects of increased meal frequency in non-insulin-dependent diabetes.
The acute effect of increasing meal frequency as a model of slow absorption was studied for 1 d in 11 patients with non-insulin-dependent diabetes. On 1 d they took 13 snacks (the nibbling diet) and on another day the same diet was taken as three meals and one snack (the three-meal diet). The nibbling diet reduced mean blood glucose, serum insulin, and C peptide concentrations over the 9.5 h of observation and 24-h urinary C peptide output by 12.7 +/- 3.7% (mean +/- SE) (P = 0.0062), 20.1 +/- 5.8% (P = 0.0108), 9.2 +/- 2.6% (P = 0.0073), and 20.37 +/- 8.12% (P = 0.039), respectively, compared with the three-meal diet. Serum triglyceride concentrations were lower by 8.5 +/- 3.2% (P = 0.037). Despite lower insulin concentrations on the nibbling diet, the concentrations of free fatty acids, 3-hydroxybutyrate, and the insulin-sensitive branched-chain amino acids responded similarly on both treatments. Metabolic benefits seen with increased meal frequency may explain the success of similar agents that prolong absorption, including fiber and enzyme inhibitors.
Postoperative seizures.
Two young patients with extensive ulcerative colitis were treated with oral steroids and developed seizures between 36 and 72 h after emergency colectomy. These cases highlight the problem of postoperative seizures, related to previous steroid administration, fluid overload, postoperative hypertension and biochemical abnormalities.
Hepatic resection for colorectal metastases--selection of cases and determinants of success.
Twenty-six patients undergoing hepatic resection for colorectal metastases have been followed for periods varying from 1 month to 8 years. The actuarial 5 year survival rate was just over 50% for all patients. Patients surviving for more than 2 years have been considered separately, and an attempt was made to determine what clinical factors determine whether a patient is likely to benefit from surgery or not. A stage I hepatic lesion, involvement of one rather than both lobes, the presence of less than four metastases and pathological proof that resection margins were free of tumour combined to define a group of patients with a 75% 5 year survival rate. The stage of the disease and the presence of unilobar metastases were the most important determinants of benefit. Patients demonstrating one or more unfavourable factors did not appear to benefit from hepatic resection.
Stimulation of sugar transport by a factor released from gas-perfused hearts.
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Graded responses in isolated kitten atria due to blockade of conduction by cetyltrimethyl-ammonium bromide (CTAB).
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Intercostal pedicle flap for thoracic oesophageal perforations.
Oesophageal perforations are associated with a high mortality and morbidity. Intrathoracic perforations especially are associated with mediastinitis and sepsis. The repair of these perforations may be difficult, particularly when there has been a delay to diagnosis. We report our use of a method to repair or buttress the suture line after repair with a vascularized intercostal muscle flap, having used it successfully in two patients with intrathoracic oesophageal perforations.