Clear cell sarcoma in unusual sites mimicking metastatic melanoma

Table 1 Timeline of patient history and medical intervention of case 1

Dates	Relevant past medical history and intervention
	Summaries from initial and follow-up visits	Diagnostic testing	Interventions
July 2009	Patient presented with a 6-mo history of left jaw pain and mass	Cytological examination of fine-needle aspirate of the mass	Surgical resection of the neck mass
July 2009	Post-surgery follow-up	A whole-body PET/CT scan and MRI of the head and neck region	Interferon alpha-2 (18 MIU three times a week for 8 wk)
September 2009	On routine follow-up, an enlarged left supraclavicular lymph node was identified	PET/CT scan	Radiotherapy to the supraclavicular node in addition to the interferon alpha-2
October 2009	Metastatic disease to the left pterygoid region, masseter muscle and the temporalis muscle	PET/CT scan and MRI	Complete resection of involved areas with adjuvant weekly radiotherapy
February 2010	Metastatic disease to the lungs, spine and left neck soft tissue	PET/CT scan and MRI	Expired within a wk

MRI: Magnetic resonance imaging; PET/CT: Positron emission tomography/computed tomography.