title: Retroperitoneal abscess shortly after chemotherapy for lung cancer: A case report.
abstract: To the best of our knowledge, the formation of a retroperitoneal abscess due to acute appendicitis shortly after administration of chemotherapy for lung cancer has not been previously reported. This is the case report of a 59-year-old male who was admitted to the Mito Medical Center (Mito, Japan) and diagnosed with lung adenocarcinoma with pleuritis carcinomatosis. Although no distant metastasis was identified, combination chemotherapy with cisplatin and pemetrexed was administered. Nine days after initiating chemotherapy, the patient developed right lower quadrant abdominal pain and high fever. Computed tomography (CT) of the abdomen and pelvis revealed the collection of gas and fluid in the retroperitoneum adjacent to the cecum. The abscess was locally drained; however, the infection continued to spread, with subsequent development of a scrotal abscess. Consequently, appendectomy was performed. The patient recovered well and the lung adenocarcinoma was treated with additional courses of chemotherapy following the remission of the local inflammation. Retroperitoneal abscess due to acute appendicitis is an unusual finding; however, this rare complication should be considered during or shortly after chemotherapy in patients with lung cancer.
authors.affiliation: Division of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan.
authors.forename: Gen
authors.initials: G
authors.lastname: Ohara
authors.affiliation: Division of Surgery, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Kondo
authors.affiliation: Division of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan.
authors.forename: Katsunori
authors.initials: K
authors.lastname: Kagohashi
authors.affiliation: Division of Respiratory Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
authors.forename: Hiroko
authors.initials: H
authors.lastname: Watanabe
authors.affiliation: Division of Respiratory Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
authors.forename: Mio
authors.initials: M
authors.lastname: Kawaguchi
authors.affiliation: Division of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Kurishima
authors.affiliation: Division of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Satoh
authors.affiliation: Division of Respiratory Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Hizawa
keywords: chemotherapy; lung cancer; retroperitoneal abscess