TASK DEFINITION: Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).
PROBLEM: Abstract: Methods for endoscopic retrograde cholangiography (ERC) and endoscopic papillotomy (EPT) in patients with Billroth-II operations are described, and experience with their use during the last four years (since 1980) is presented. Endoscopic retrograde cholangiopancreatography was successful in 134 of 147 patients (92%) and endoscopic papillotomy was successful in 46 of 50 patients. The described methods were used in two different hospitals by two different endoscopists and there was no difference in the results. We conclude that patients with a Billroth-II operation may undergo endoscopic diagnostic as well as therapeutic procedures with a high rate of success, with similar results as in ordinary patients and with no greater risk of complications.
Which is the apt title for the abstract? option1: Endoscopic retrograde cholangiography and endoscopic papillotomy in patients with a previous Billroth-II resection. option2: Leads from the MMWR. Congenital syphilis--United States, 1983-1985.

SOLUTION: Endoscopic retrograde cholangiography and endoscopic papillotomy in patients with a previous Billroth-II resection.

PROBLEM: Abstract: During development, cells become progressively restricted, until they reach their final phenotype. Differentiation was originally thought to be irreversible, but phenotypic plasticity has been observed in a variety of cell types, for example sympathetic neurones, the limb blastema and some glial cell types. A detailed description of the individual steps that lead to expression or reversal of phenotype is essential to understand the molecular events underlying cell differentiation. We examined whether ciliary neurones acquire adrenergic properties when exposed to a permissive embryonic environment. Cholinergic neurones were selectively labelled with a retrogradely transported marker and injected into chick embryos during active neural crest migration. Four to five days after injection, some of the labelled neurones were found in 'adrenergic sites' and had developed catecholamine histofluorescence. The cells had thus accumulated adrenergic neurotransmitters even after differentiation into cholinergic neurones. This result shows that neurotransmitter plasticity occurs in cholinergic neurones and suggests that the neurotransmitter phenotype can be modified by the embryonic environment.
Which is the apt title for the abstract? option1: Cholinergic neurones acquire adrenergic neurotransmitters when transplanted into an embryo. option2: Quantitative CT applications: comparison of current scanners [published erratum appears in Radiology 1987 Sep;164(3):879]

SOLUTION: Cholinergic neurones acquire adrenergic neurotransmitters when transplanted into an embryo.

PROBLEM: Abstract: The characteristic clinical and histological features of three cases of malignant eccrine poroma are discussed, in addition to the metastatic disease that had occurred in two cases. These cases were compared with previously reported cases of malignant eccrine poroma that had metastasised, and it is suggested that a strict classification of malignant eccrine sweat gland tumours should be made.
Which is the apt title for the abstract? option1: Malignant eccrine poroma: report of three cases. option2: Immunosuppressive factor (or factors) produced by human embryos in vitro [letter]

SOLUTION:
Malignant eccrine poroma: report of three cases.