Shiitake flagellate dermatitis is an intensely pruritic erythematous or violaceous eruption marked by “whip-like” linear streaks consisting of papules or plaques following the ingestion of undercooked shiitake mushrooms (Lentinula edodes). Most commonly localized on the trunk and upper limbs, the characteristic pattern of the rash is associated with the consumption of lentinan, a thermolabile toxin found within the mushroom, as well as a broad range of other dermatological conditions, including dermatomyositis, adult-onset Still’s disease, and reactions to medications such as bleomycin. In this case report, we present a 24year-old active duty service member who presented to the clinic for the evaluation of a flagellate erythematous eruption on his abdomen, back, and extremities. As U.S. forces pivot to operating in austere and resource-limited settings in the Pacific, recognizing the spectrum of diagnoses encompassed by flagellate erythema is important for maintaining operational readiness and differentiating self-limited cutaneous manifestations from more serious underlying conditions associated with this finding.

Dermatofibrosarcoma protuberans (DFSP) is a rare soft tissue sarcoma. Neurofibromatosis type 1 (NF1) is a neurocutaneous syndrome that affects multiple organ systems. We present the case of a 47-year-old African American male with a two-year history of a slowly enlarging right lower back lesion. Upon workup, the 3 × 2 cm mass was biopsied confirming a diagnosis of DFSP. This was identified in concert with axillary freckling, café-au-lait spots, and pedunculated plaques evaluated with biopsy. The findings were consistent with neurofibromas, leading to a new diagnosis of NF1. The patient was definitively treated with wide local excision of the DFSP lesion without tumor recurrence over six years. DFSP has a favorable prognosis when treated with wide local excision and negative surgical margins. However, lesions may recur with inadequate margins. Although deferred in our patient, treatment with imatinib mesylate, a tyrosine kinase inhibitor, may be employed in the setting of advanced disease, metastasis, positive surgical margins, or irresectable locations. Imatinib has also been used to treat NF1. Hence, we posit that the concomitant presentation of these two disease entities in our patient highlights a potentially unique treatment with imatinib mesylate. To our knowledge, this is the second reported case of both entities in the same patient.

We describe a 20-year-old male with no significant medical history who presented with a 1-month history of painless upper and lower lip edema initially treated with antibiotics for suspected cellulitis before arriving to the clinic. After a failed response to that treatment, a lip biopsy was eventually performed and consistent with a diagnosis of granulomatous cheilitis. In addition to oral and topical corticosteroids and tacrolimus, the patient adopted the cinnamon-and benzoate-free diet with some improvement of his lip swelling. Persistent mild tachycardia led to a cardiology referral for further evaluation and sarcoidosis workup. A gastroenterology consult was placed to correlate his presentation with Crohn's disease. The cardiology workup was noncontributory, and the patient was ultimately diagnosed with Crohn's disease after evaluation with laboratory studies and colonoscopy. This case highlights the need to evaluate for Crohn's disease in patients who present with granulomatous cheilitis, even in the absence of gastrointestinal symptoms, and the potential benefit of incorporating a cinnamon-and benzoate-free diet in treatment.