We report two cases of severe ulcerative cutaneous chronic GVHD (cGVHD) that involved areas of sensory loss. The report highlights the importance of meticulous wound care and injury prevention measures to reduce the risk of this complication.Patient #1 is a 56-year-old African-American female who received an allogeneic transplant using matched related donor PBSCs in February 2009 as treatment for stage IVB diffuse large B-cell lymphoma who had failed initial therapy with R-CHOP in 2005, and then relapsed after a salvage regimen of rituximab, ifosphamide, cisplatin and etoposide followed by carmustine, etoposide, cytosine arabinoside, melphalan and rituximab with autologous SCT in 2006. Before her allogeneic transplant, she received fully ablative conditioning with 60 mg/kg/day for 2 days of CY and TBI (1200 cGy), and tacrolimus (targeted to 10 μg/L) and methotrexate (5 mg/m 2 on day +1, +6, +9 and +11) were used as GVHD prophylaxis. Neutrophil and platelet engraftment were on days 17 and 11, respectively and blood STRs confirmed 100% donor chimerism by day 17. On day 31 she developed, grade III acute GVHD with diffuse rash, liver enzyme elevation and diarrhea; colonoscopy and biopsy confirmed acute GVHD (aGVHD). With tapering steroid therapy, aGvHD improved but she continued on 10 mg prednisone daily.From day 100 onward, she complained of sensory loss of subacute onset below both knees. An electron myography and nerve conduction (EMG-NC) study revealed decreased sensory responses in the right sural nerve and superficial peroneal nerve; but a left-sided study could not be performed owing to extensive and multiple cutaneous ulcers that developed from day 150 onward (Figure 1). Although the patient had received XRT (36 cGy over 20 fractions) to a left inguinal mass in 2006, no cause for the bilateral neuropathy could be determined; however, the histology of biopsies from the ulcers was consistent with that of GVHD. Subsequently, four apparently identical ulcers appeared on the right leg. Oral prednisone was continued at 10 mg and she was given standard wound care. Although these lesions have persisted for~3 years, they are slowly improving without surgical intervention. 1 At her 60-month follow-up, the patient remains in CR.Patient #2 is a 24-year-old Caucasian female who received an HLA-matched related donor PBSC transplant in August 2009 after entering CR2 of AML with diploid cytogenetics. Conditioning was with BU/CY (BU 0.8 mg/kg every 6 h × 4days with blood levels, CY 60 mg/kg/day for 2 days) and she received tacrolimus (targeted to 10 μg/L) and MTX (5 mg/m 2 on day +1, +6, +9 and +11) as GVHD prophylaxis. Following engraftment, she developed grade I aGVHD that resolved after treatment with prednisone. She had no cGvHD. Unfortunately, 35 months later, she relapsed with isolated meningeal disease and a left ileopsoas granulocytic sarcoma (GS), which produced a motor deficit and sensory loss affecting the L4/5 nerve root distribution (left upper lateral thigh and knee). BM biopsy was negative for disease. She rec...