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Contemporary Oncology/Współczesna Onkologia
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Case report

Castleman’s disease mimicking lymph node metastases in a young woman with laryngeal cancer

Krystyna Serkies
,
Małgorzata Łazar-Poniatowska
,
Joanna Seredyńska
,
Wojciech Biernat
,
Jacek Jassem

Contemp Oncol (Pozn) 2016; 20 (5): 421-424
Online publish date: 2016/12/20
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Introduction

Carcinoma of the larynx typically occurs in adult males. Primary risk factors for this tumour include active and passive smoking, alcohol abuse, and poor oral hygiene [1]. Human papilloma virus (HPV) and human immunodeficiency virus (HIV) infections, impaired immunity, gastro-oesophageal reflux disease, as well as several molecular abnormalities are additional risk factors for this malignancy [2]. The course of laryngeal cancer is strictly related to its location: cancers located in the glottis have relatively slow growth and low risk of nodal metastases. Among children and young adults, the disease, most frequently located in the glottis, is extremely rare. Laryngeal carcinoma in adolescents is believed to have particularly aggressive behaviour.
Castleman’s disease (CD) is a noncancerous lymphoproliferative disorder of unclear aetiology [3–6]. This entity occurs in heterogeneous clinicopathological forms and comprises at least two distinct diseases: a unicentric CD (UCD; 90%) subtype and a multicentric (MCD) subtype, which develops in both HIV-negative or HIV-positive patients. There are three classical histological subtypes of CD: a hyaline-vascular (HV, most common, 60%), plasma cell (PC, 10%), and mixed variants. The recently described plasmablastic subtype is associated with MCD and mostly with human herpes virus 8 (HHV-8) and HIV co-infection. Epstein-Barr virus infection may also result in nodal CD. Finally, immune disorders and autoimmunisation have been postulated as pathogenic factors of CD.
The unicentric HV variant of CD occurs mainly in adolescents as a slowly growing tumour located in the mediastinum or neck region [5, 6]. After surgical excision of the lesion recurrence is extremely rare. MCD, typically a PC subtype, occurs in adults and affects mainly peripheral lymph nodes. MCD represents a systemic disease with more aggressive behaviour and uncertain prognosis. MCD frequently manifests with systemic symptoms, such as fever, weight loss, weakness, and night sweats, considered to be a result of overproduction of interleukin-6 (IL-6) by lymph nodes (primary under influence of HHV-8) [5].
The coincidence of CD with solid tumours is extremely rare. We present a case of an 18-year-old woman who developed CD in cervical lymph nodes during radical irradiation for laryngeal cancer.

Case report

An 18-year-old woman with T2N0M0 laryngeal cancer was admitted in October 2008 to receive radical radiotherapy. The patient reported an increasing hoarseness lasting for five months. She negated alcohol or tobacco use, laryngeal papillomatosis, and prior neck radiotherapy. Laryngoscopic examination revealed a lesion involving the left true vocal cord, left laryngeal pocket, and posterior part of the ventricle false cord. Biopsy of the lesion revealed moderately differentiated squamous cell carcinoma of the larynx (Fig. 1A, B). CT demonstrated thickening of 8 mm of the left false vocal cord, shallowing the left laryngeal ventricle, and infiltration extending to the upper part of the vocal cord and small (up to 5 mm in the greatest diameter) unspecific lymph nodes of the neck. Staging work-up, including chest CT and ultrasound examination of the neck and abdomen, was negative for metastases. The patient was referred to radical radiotherapy with four lateral 6 MEV photon beams (5.5 cm × 7.5 cm) to the total dose of 66 Gy in 33 fractions. She started treatment two weeks after the diagnosis. Another laryngeal examination, performed on the first day of radiotherapy, showed previously absent infiltration of the anterior commissure and subglottis. Owing to these findings, after delivering 6 Gy, the lower radiation fields were extended by 0.5 cm. Additional CT, performed for radiotherapy modification revealed previously absent, enlarged, left-sided cervical lymph nodes of the second group, outside the irradiated region. An ultrasound of this region showed enlarged lymph nodes with a central hyperechoic area. The biggest lymph node was 2.5 cm in diameter and was localised at the left mandibular angle. Radiotherapy was resumed after a three-day pause. The patient refused fine-needle aspiration biopsy of the neck lymph node. PET-CT performed without interrupting radiotherapy revealed metabolically active lesions in the larynx and in the left cervical lymph nodes at the level of the third cervical vertebra (SUV of 3.8 and 2.4, respectively). After 19 fractions the enlarged cervical lymph nodes were removed. The surgery caused an additional four-day pause in radiotherapy. The tissue material contained two lymph nodes (17 and 12 mm in diameter), with macroscopic features of typical reactive inflammatory response. Histopathology examination showed HV type of CD (Fig. 1C, D). During six-year follow-up, she has been free of cancer recurrence and CD disease symptoms.

Discussion

Laryngeal carcinoma in patients aged below 40 years accounts for less than 3% of all laryngeal cancer cases [7–9]. The rarity of the disease among adolescents hampers the diagnosis and may lead to delay in treatment, as was the case in our patient. It has been estimated that in glottis cancer patients a one-month delay from the onset of symptoms to start of radiotherapy was equivalent to a 4.5% decrease in recurrence-free survival [10].
The management of laryngeal cancer in young people is similar to that in adults. Radiotherapy continues to be the preferred method, allowing in most cases preservation of laryngeal function and voice. On the other hand, this modality is associated with the risk of post-irradiation effects including second malignancies. The patient presented in this report received conventional radiotherapy at a dose of 66 Gy to a region confined to the larynx. As recently reported, a 13-year-old boy with T2N0MX moderately differentiated HPV-positive squamous cell carcinoma of the glottis was administered a hyperfractionated dose of 81.6 Gy [11].
Diagnosis of CD is based on histological evaluation of lymph nodes, but fine-needle biopsy may be sufficient to confirm CD in the extranodal sites, although it is challenging for the pathologist. On clinical examination and radiological images, CD can mimic various lesions, including malignant disorders [12–14]. If accompanied by cancer, it may be misdiagnosed as progression or recurrence. Specific calcifications may occur in the HV type; however, as in our case, they are usually absent from the involved lymph nodes. Intensively enhancing CD-involved nodal masses present in CT scans can be difficult to distinguish from lymphomas or cancer metastases. PET is helpful in resolving ambiguous CT findings [6]. As in our patient, SUV values of CD-involved lymph nodes are lower than those typical for lymphoma or cancer metastases.
The association between CD and cancer remains unclear. Several authors suggested that CD is associated with an increased risk of lymphomas and lymphoma-associated diseases [15, 16]. HHV-8 infection, typical for MCD, is often present in AIDS patients with or without Kaposi sarcoma, and those with other lymphomas. It was suggested that IL-6 and VEGF are the paracrine factors related to CD involved in carcinogenesis of malignant tumours that coexisted with CD [5, 17]. Anecdotal coincidences of CD with lymphomas, B-cell non-Hodgkin, and Hodgkin lymphomas and with multiple myeloma were reported [18, 19]. A few reports described co-existence of CD (frequently unicentric and HV type) and solid neoplasms including ovarian, colorectal, bladder, renal, lung and tongue cancer, hepatocellular carcinoma, and retroperitoneal leiomyosarcoma, diagnosed in both early or advanced stages of disease [17, 20–25].
To our knowledge this is the first published report of the co-existence of CD and laryngeal carcinoma. The possible relationship between CD and this rare case of laryngeal cancer in an adolescent remains unclear. Castleman’s disease should be kept in mind as a differential diagnosis for nodal enlargement.

The authors declare no conflict of interest.

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Address for correspondence

Krystyna Serkies
Medical University of Gdansk
Dębinki 7 80-211 Gdańsk, Poland
e-mail: kserkies@gumed.edu.pl

Submitted: 27.10.2014
Accepted: 14.04.2015
Copyright: © 2016 Termedia Sp. z o. o. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) License (http://creativecommons.org/licenses/by-nc-sa/4.0/), allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material, provided the original work is properly cited and states its license.
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