CC BY-NC-ND 4.0 · Endosc Int Open 2017; 05(11): E1076-E1080
DOI: 10.1055/s-0043-117951
Case report
Eigentümer und Copyright ©Georg Thieme Verlag KG 2017

Slow-growing amelanotic malignant melanoma of the esophagus with long survival: a case report and review of the literature

Yutaka Hirayama
1   Department of Endoscopy, Aichi Cancer Center Hospital, Aichi, Japan
,
Tajika Masahiro
1   Department of Endoscopy, Aichi Cancer Center Hospital, Aichi, Japan
,
Tsutomu Tanaka
1   Department of Endoscopy, Aichi Cancer Center Hospital, Aichi, Japan
,
Makoto Ishihara
1   Department of Endoscopy, Aichi Cancer Center Hospital, Aichi, Japan
,
Sachiyo Ohnishi
1   Department of Endoscopy, Aichi Cancer Center Hospital, Aichi, Japan
,
Kazuo Hara
2   Department of Gastroenterology, Aichi Cancer Center Hospital, Aichi, Japan
,
Nobumasa Mizuno
2   Department of Gastroenterology, Aichi Cancer Center Hospital, Aichi, Japan
,
Susumu Hijioka
2   Department of Gastroenterology, Aichi Cancer Center Hospital, Aichi, Japan
,
Nozomi Okuno
2   Department of Gastroenterology, Aichi Cancer Center Hospital, Aichi, Japan
,
Tetsuya Abe
3   Department of Gastroenterological Surgery, Aichi Cancer Center Hospital, Aichi, Japan
,
Norihisa Uemura
3   Department of Gastroenterological Surgery, Aichi Cancer Center Hospital, Aichi, Japan
,
Jiro Kawakami
3   Department of Gastroenterological Surgery, Aichi Cancer Center Hospital, Aichi, Japan
,
Shintarou Kurahashi
3   Department of Gastroenterological Surgery, Aichi Cancer Center Hospital, Aichi, Japan
,
Yasuhiro Shimizu
3   Department of Gastroenterological Surgery, Aichi Cancer Center Hospital, Aichi, Japan
,
Yasushi Yatabe
4   Department of Pathology and Molecular Diagnosis, Aichi Cancer Center Hospital, Aichi, Japan
,
Yasumasa Niwa
1   Department of Endoscopy, Aichi Cancer Center Hospital, Aichi, Japan
› Author Affiliations
Further Information

Corresponding author

Yutaka Hirayama
Department of Endoscopy
Aichi Cancer Center Hospital
1-1 Kanokoden, Chikusa-ku
Nagoya, Aichi 464-8681, Japan
Fax: +81-52-764-2963   

Publication History

submitted 08 March 2017

accepted after revision 26 June 2017

Publication Date:
27 October 2017 (online)

 

Abstract

Background and study aims We report a case of amelanotic malignant melanoma of the esophagus (AMME), an exceedingly rare disease. A 77-year-old Japanese woman presented to our hospital with features suggestive of a middle esophageal submucosal tumor, which was diagnosed pathologically as AMME. The patient underwent thoracoscopic resection of the esophagus and laparoscopic gastric tube reconstruction. Three years after surgery, computed tomography showed no recurrence. Generally, the prognosis of malignant melanoma of the esophagus is very poor. However, our patient had no recurrence, and is alive 3 years after surgery and 5 years after the tumor was first detected.


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Introduction

Primary amelanotic malignant melanoma of the esophagus (PAMME) is an extremely rare disease with a poor prognosis, often progressing with multiple metastases even in the early stages of the disease; only a few case reports have been published in the literature. PAMME is frequently misdiagnosed at biopsy as poorly differentiated squamous cell carcinoma (SCC), sarcoma, spindle cell carcinoma, or undifferentiated carcinoma because of the negligible amounts of melanin pigments, which are characteristic of malignant melanoma, and the morphological features of the tumor cells. We herein report the case of a long-surviving patient with a slow-growing amelanotic malignant melanoma of the esophagus (AMME).


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Case Report

A 77-year-old woman was admitted to our hospital in 2013 for investigation and treatment of a submucosal tumor (SMT) of the esophagus, measuring > 2 cm in diameter, which had been detected by upper gastrointestinal barium series.

Initially, she had been advised to visit another hospital for investigation of the esophageal SMT, which had been earlier detected by esophagogastroduodenoscopy (EGD). However, she did not undergo any examination because she was asymptomatic as of 2011. In 2013, 2 years later, she was advised to return to hospital for investigation of the esophageal SMT which now measured > 2 cm in diameter, and had been detected by barium series performed to investigate a history of mild dysphagia. She was subsequently referred to our hospital in November 2013. On physical examination, we found no pigmented lesions in the eyes or skin, and no other abnormalities were detected. Results of blood tests were within normal limits.

On EGD ([ Fig. 1 ]), the lesion exhibited almost no change in size over the years. A well-defined non-pigmented elevated lesion with a flat proximal edge was situated 23 cm from the incisors, and extended to 25 cm from the incisor teeth. Magnifying endoscopy with narrow-band imaging showed subepithelial structures resembling reticular vessels. On the surface of the lesion, we could not identify features of intrapapillary capillary loop changes such as dilatation, meandering, change in caliber, variety in shape, and destruction, which are regarded as typical findings in esophageal SCC. The findings in the lesion seemed to be different from the typical findings of esophageal SCC. Endoscopic ultrasonography depicted the tumor as a well-circumscribed and low-echoic mass within the submucosal layer.

Zoom Image
Fig. 1 Endoscopic examination. a Esophageal SMT at first detection. b, c A well-defined non-pigmented elevated lesion with a flat proximal edge 2 years after first detection. d Narrow band imaging magnification endoscopy showing subepithelial structures resembling reticular vessels. e Iodine staining. f Endoscopic ultrasonography depicted the tumor as a well-circumscribed low-echoic mass within the submucosal layer.

Histological examination of a biopsy specimen showed proliferation of malignant spindle cells. Minimal melanin pigment was seen on hematoxylin and eosin staining and the histology of the tumor was relatively uniform. Immunohistochemically, the tumor cells were positive for CD117, S-100 protein, MITF, and HMB 45, and negative for CD34, actin, and Dog1.Ki67-positive cells comprised 1 – 3 %. These findings confirmed the diagnosis of malignant melanoma of the esophagus (MME). Computed tomography and positron emission tomography – computed tomography showed no metastasis.

Consequently, we made a definitive diagnosis of middle esophageal malignant melanoma without metastasis. Subsequently, the patient underwent thoracoscopic resection of the esophagus and laparoscopic gastric tube reconstruction, which was performed by pulling up the stomach via the retrosternal route; the anastomotic site was the neck.

The resected specimen contained an elevated and non-pigmented whitish tumor, measuring 20 × 12 mm ([ Fig. 2 ]). The depth of tumor invasion was to the submucosal layer. The tumor was composed of epithelioid and polyhedral cells arranged in alveolar clusters. The nuclei were bizarre and hyperchromatic with prominent nucleoli. Melanin pigment could hardly be seen except in a few tumor cells and in some macrophages located in the periphery of the tumor. Many tumor cells also showed strongly positive immunohistochemical reactivity for S-100 protein, MELAN-A, and HMB45, but were negative for CD34, DOG1, and actin ([ Fig. 3 ]). In addition, we retrospectively found small black spots beside the main tumor on EGD ([ Fig. 1 ]), and thus this lesion was diagnosed as MME.

Zoom Image
Fig. 2 Resected specimen showing a 20 × 12 mm non-pigmented elevated tumor.
Zoom Image
Fig. 3 Histopathological findings. a, b, c Hematoxylin and eosin staining (macroscopic finding, × 200, × 400). d, e, f, g Tumor cells were positive for S-100 (× 400), HMB-45 (× 200), Melan-A (× 200), and CD117 (× 200). h, i, j Tumor cells were negative for Dog1 (× 200), CD34 (× 200), and actin (× 40).

Based on these findings and the definition of AMME as described by Taniyama et al. [1], the diagnosis of PAMME was confirmed. Three years after surgery, the patient is stable. Follow-up computed tomography scan performed every 6 months after surgery has shown no signs of recurrence to date.

This case report indicates the possibility of achieving excellent outcomes with no recurrence 3 years after surgery and diagnosis of AMME and 5 years after initial detection.


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Discussion

The present case raises 2 significant points. First, the diagnosis of AMME is sometimes difficult. Second, the prognosis of patients with MME is very poor, but in some patients the prognosis is good.

SCC is the most common tumor of the esophagus, accounting for 95.5 % of all primary tumors of the esophagus in Japan [1]. Nonepithelial malignant tumors of the esophagus occur at a frequency of only 0.5 %, with carcinosarcoma being found most frequently, followed by MME [1]. AMME produces little or no melanin, and comprises approximately 10 % to 25 % of all MME [2] [3] [4].

The diagnosis of AMME on preoperative biopsy is often difficult, but the diagnosis of MME is relatively easier because of characteristic pigmentation, which is pathognomonic of the condition. Biopsy specimens of AMME may be misdiagnosed as poorly differentiated SCC. Taniyama et al. reported 10 cases of AMME misdiagnosed as undifferentiated carcinoma, SCC, and leiomyosarcoma by biopsy specimens from 1954 to 1987 [1]. In our patient, the diagnosis of AMME was actually made 2 years after the first presentation.

Generally, the prognosis of MME is very poor, with a 5-year survival of 2.2 % and median survival of approximately 10 months [5]. Despite the poor prognosis, the treatment policy in patients with MME is wide surgical resection and dissection of the lymph nodes. However, some authors have reported the remarkable efficacy of neoadjuvant chemotherapy on MME, and other authors have described the effectiveness of postoperative adjuvant chemotherapy in patients with lymph node metastases [6] [7]. Furthermore, Miyatani et al. reported the successful resection of a small lesion of MME by endoscopic mucosal resection [8]. These facts could occasionally contribute to difficulty in deciding on a treatment plan.

In the current case, the patient achieved excellent outcomes with no recurrence 3 years after surgery and 5 years after initial detection of the tumor. AMME is an extremely rare lesion, and our search of the PubMed database yielded only 14 cases in 9 reports accumulated over a 20-year period from 1996 to 2015 ([ Table 1 ]) [9] [10]. These reports state the mean survival of AMME as approximately 9 months. Therefore, our case of slow-growing AMME with long survival is extremely rare. Still, little is known about the natural history of non-aggressive esophageal tumors and whether they should be treated. According to the accumulated reports ([ Table 1 ]), there was no significant difference between non-aggressive and aggressive AMME in terms of age, sex, location, size, and endoscopic findings.

Table 1

Search results for case reports of amelanotic malignant melanoma of the esophagus between 1996 and 2015.

Reference

Age/sex

Chief complaint

Endoscopic findings

Location

Size

Treatment

Prognosis

Carr-Locke et al. [9]

66/female

Retrosternal chest discomfort

Polypoid and ulcerated tumor

Distal esophagus

 3.5 cm

Surgery

n. a.

alive 2 months after surgery

Lohmann et al. [10]

63/male

Dysphagia

Sessile tumor

Middle esophagus

 3.6 cm

Surgery and CT

Died 12 months after diagnosis

Lohmann et al. [10]

67/female

Dysphagia

Polypoid and ulcerated tumor

Middle esophagus

 2.2 cm

Surgery

Alive 60 months after surgery

Lohmann et al. [10]

72/male

Dysphagia

Polypoid tumor

Middle esophagus

n. a.

Laser ablation

Died 13 months after diagnosis

Lohmann et al. [10]

70/female

Anorexia

Sessile and ulcerated tumor

Distal esophagus

10 cm

Surgery

Died 2 months after diagnosis

Lohmann et al. [10]

58/female

Dysphagia

Polypoid and ulcerated tumor

Distal esophagus

11 cm

Surgery

Died 4 months after diagnosis

Suzuki et al. [10]

58/male

No symptom

Ulcerated tumor

Middle esophagus

 6.5 cm

Surgery, CT, IT and ET

Alive 53 months after surgery (recurrence at 11 months)

Heidemann et al. [10]

75/male

Dysphagia weight loss

Ulcerated tumor

Middle and distal esophagus

 8 cm

Surgery

n. a.

recurrence at 7 months

De Simone et al. [10]

58/female

Dysphagia, retrosternal pain, weight loss

Polypoid tumor

Middle esophagus

 3 cm

Surgery

Died 16 months after surgery

Stringa et al. [1] [2]

59/male

Mild dysphagia, heartburn, moderate anorexia, weight loss

Polypoid and ulcerated tumor

Lower third of the esophagus

 8 cm

Surgery and CT

n. a.

Disseminated 14 months after diagnosis

Terada [10]

87/female

Nausea, vomiting

Ulcerated tumor

Distal esophagus

n. a.

CT and RT

Died 12 months after first presentation

Terada [10]

56/male

Dysphagia

Polypoid tumor

Middle esophagus

n. a.

CT and RT

Died 7 months after first presentation

Kranzfelder et al. [3]

57/male

Dysphagia, dynophagia, weight loss

Ulcerated tumor

Distal esophagus

 7 cm

Surgery and RT

Died 4 months after diagnosis

Ramaswamy et al. [4]

24/female

Dysphagia neck swelling

Polypoid tumor

Cervical esophagus

 4.3 cm

Surgery and CT

Died 8 months after first presentation

Current case

77/female

Dysphagia

Polypoid tumor

Middle esophagus

 2 cm

Surgery

Alive 60 months after first presentation

n. a., not available; CT, chemotherapy; RT, radiation therapy; ET, endocrine therapy; IT, immunotherapy

1 This article is included in the review of Bisceglia et al. [10].


Few reports have discussed the slow-growing type of MME and so it is difficult to predict the malignant behavior of this case. It may be improbable that a small low-grade malignant tumor without blood and lymph vessel invasion could metastasize to lymph nodes and other organs. Nevertheless, it is also necessary to evaluate other cases in order to determine whether this type of non-aggressive slow-growing melanoma transforms into the common, aggressive type of MME.


#

Conclusion

In conclusion, the current case and review of the literature suggest that our case of slow-growing AMME with long survival is extremely rare. Evaluation of more cases is required; however, it is important to further assess and characterize MME.


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Competing interests

None

  • References

  • 1 Taniyama K, Suzuki H, Sakuramachi S. et al. Amelanotic malignant melanoma of the esophagus: case report and review of the literature. Jpn J Clin Oncol 1990; 20: 286-295
  • 2 Stringa O, Valdez R, Beguerie JR. et al. Primary amelanotic melanoma of the esophagus. Int J Dermatol 2006; 45: 1207-1210 Review
  • 3 Kranzfelder M, Seidl S, Dobritz M. et al. Amelanotic esophageal malignant melanoma: case report and short review of the literature. Case Rep Gastroenterol 2008; 2: 224-231
  • 4 Ramaswamy B, Bhandarkar AM, Venkitachalam S. et al. Amelanotic malignant melanoma of the cervical oesophagus. BMJ Case Rep 2014; 2014
  • 5 Naomoto Y, Perdomo JA, Kamikawa Y. et al. Primary malignant melanoma of the esophagus: report of a case successfully treated with pre- and post-operative adjuvant hormone-chemotherapy. Jpn J Clin Oncol 1998; 28: 758-761
  • 6 Yano M, Shiozaki H, Murata A. et al. Primary malignant melanoma of the esophagus associated with adenocarcinoma of the lung. Surg Today 1998; 28: 405-408
  • 7 Kato N, Kamino K, Yamashita T. et al. Primary malignant melanoma of the esophagus. Gan No Rinsho 1986; 32: 1459-1465
  • 8 Miyatani H, Yoshida Y, Ushimaru S. et al. Slow growing flat-type primary malignant melanoma of the esophagus treated with cap-assisted EMR. Dig Endosc 2009; 21: 255-257
  • 9 Carr-Locke DL, Mehra K, Kumar S. et al. Primary amelanotic malignant melanoma of the esophagus. New York: Medscape LLC; 2009. Available from: http://www.medscape.com/viewarticle/712478
  • 10 Bisceglia M, Perri F, Tucci A. et al. Primary malignant melanoma of the esophagus: a clinicopathologic study of a case with comprehensive literature review. Adv Anat Pathol 2011; 18: 235-252

Corresponding author

Yutaka Hirayama
Department of Endoscopy
Aichi Cancer Center Hospital
1-1 Kanokoden, Chikusa-ku
Nagoya, Aichi 464-8681, Japan
Fax: +81-52-764-2963   

  • References

  • 1 Taniyama K, Suzuki H, Sakuramachi S. et al. Amelanotic malignant melanoma of the esophagus: case report and review of the literature. Jpn J Clin Oncol 1990; 20: 286-295
  • 2 Stringa O, Valdez R, Beguerie JR. et al. Primary amelanotic melanoma of the esophagus. Int J Dermatol 2006; 45: 1207-1210 Review
  • 3 Kranzfelder M, Seidl S, Dobritz M. et al. Amelanotic esophageal malignant melanoma: case report and short review of the literature. Case Rep Gastroenterol 2008; 2: 224-231
  • 4 Ramaswamy B, Bhandarkar AM, Venkitachalam S. et al. Amelanotic malignant melanoma of the cervical oesophagus. BMJ Case Rep 2014; 2014
  • 5 Naomoto Y, Perdomo JA, Kamikawa Y. et al. Primary malignant melanoma of the esophagus: report of a case successfully treated with pre- and post-operative adjuvant hormone-chemotherapy. Jpn J Clin Oncol 1998; 28: 758-761
  • 6 Yano M, Shiozaki H, Murata A. et al. Primary malignant melanoma of the esophagus associated with adenocarcinoma of the lung. Surg Today 1998; 28: 405-408
  • 7 Kato N, Kamino K, Yamashita T. et al. Primary malignant melanoma of the esophagus. Gan No Rinsho 1986; 32: 1459-1465
  • 8 Miyatani H, Yoshida Y, Ushimaru S. et al. Slow growing flat-type primary malignant melanoma of the esophagus treated with cap-assisted EMR. Dig Endosc 2009; 21: 255-257
  • 9 Carr-Locke DL, Mehra K, Kumar S. et al. Primary amelanotic malignant melanoma of the esophagus. New York: Medscape LLC; 2009. Available from: http://www.medscape.com/viewarticle/712478
  • 10 Bisceglia M, Perri F, Tucci A. et al. Primary malignant melanoma of the esophagus: a clinicopathologic study of a case with comprehensive literature review. Adv Anat Pathol 2011; 18: 235-252

Zoom Image
Fig. 1 Endoscopic examination. a Esophageal SMT at first detection. b, c A well-defined non-pigmented elevated lesion with a flat proximal edge 2 years after first detection. d Narrow band imaging magnification endoscopy showing subepithelial structures resembling reticular vessels. e Iodine staining. f Endoscopic ultrasonography depicted the tumor as a well-circumscribed low-echoic mass within the submucosal layer.
Zoom Image
Fig. 2 Resected specimen showing a 20 × 12 mm non-pigmented elevated tumor.
Zoom Image
Fig. 3 Histopathological findings. a, b, c Hematoxylin and eosin staining (macroscopic finding, × 200, × 400). d, e, f, g Tumor cells were positive for S-100 (× 400), HMB-45 (× 200), Melan-A (× 200), and CD117 (× 200). h, i, j Tumor cells were negative for Dog1 (× 200), CD34 (× 200), and actin (× 40).