| X051 | XSA | X-linked Severe Anemia | Rare genetic anemia | XSA patient treated with transfusions |
| X052 | XRA | X-ray Absorptiometry | Imaging for bone density | DXA scan uses XRA to assess osteoporosis |
| X053 | XSG | Xenograft | Tissue transplant from different species | XSG skin graft in experimental study |
| X054 | XMR | Xenon Magnetic Resonance | Imaging technique with xenon | XMR for brain perfusion imaging |
| X055 | XSP | X-linked Severe Psoriasis | Rare genetic psoriasis | XSP managed with systemic therapy |
| X056 | XBC | Xanthine Blood Concentration | Measure of xanthine in blood | XBC monitored in metabolic disorder |
| X057 | XBP | X-box Binding Protein | Transcription factor | XBP measured in ER stress studies |
| X058 | XIC | X-linked Immunodeficiency with Hyper-IgM | Genetic immune disorder | XIC patient treated with immunoglobulin |
| X059 | XLE | X-linked Lymphedema | Genetic lymphatic disorder | XLE patient managed with compression therapy |
| X060 | XRC | X-ray Computed | Imaging using X-rays | Chest CT as XRC to detect lesions |
| X061 | XDT | X-linked Dystrophinopathy | Genetic muscular disorder | XDT diagnosed via genetic testing |
| X062 | XPK | X-linked Pyruvate Kinase Deficiency | Genetic enzyme deficiency | XPK patient treated for hemolytic anemia |
| X063 | XEN | Xenobiotic Exposure | Contact with foreign substances | XEN monitored in toxicology study |
| X064 | XLM | X-linked Myopathy | Genetic muscle disease | XLM patient evaluated with EMG |
| X065 | XRD | X-ray Diffraction | Technique to study crystal structures | XRD used in bone mineral research |
| X066 | XMT | Xenon Multi-Target Imaging | Advanced imaging | XMT used in functional brain studies |
| X067 | XSI | X-linked Severe Immunodeficiency | Rare immune disorder | XSI treated with bone marrow transplant |
| X068 | XLA | X-linked Agammaglobulinemia | B-cell deficiency | XLA patient receives IVIG therapy |
| X069 | XDR | Extensively Drug-Resistant | Resistance to multiple antibiotics | XDR-TB managed in isolation |
| X070 | XDP | X-linked Dystonia Parkinsonism | Genetic movement disorder | XDP patient managed with therapy |
| X071 | XLR | X-linked Recessive | Pattern of inheritance | Hemophilia is XLR disease |
| X072 | XPR | X-linked Progressive Retinal Atrophy | Genetic eye disorder | XPR patient monitored for vision loss |
| X073 | XSC | X-linked Severe Combined Immunodeficiency | Severe immune disorder | XSC treated with bone marrow transplant |
| X074 | XLD | Xylose Lysine Deoxycholate | Selective culture medium | XLD agar used to isolate Salmonella |
| X075 | XCR | Xenograft Cardiac Reperfusion | Experimental procedure | XCR studied in animal models |
| X076 | XIF | X-linked Immunodeficiency Factor | Genetic immune disorder | XIF patient monitored for infections |
| X077 | XBM | X-linked Bone Marrow Failure | Rare hematologic disorder | XBM patient evaluated for transplantation |
| X078 | XFS | X-linked Fragile Skin | Genetic dermatologic disorder | XFS patient managed for skin fragility |
| X079 | XNG | X-linked Neutropenia Genetic | Rare immune disorder | XNG monitored for infections |
| X080 | XPA | Xeroderma Pigmentosum Group A | UV sensitivity disorder | XPA patient avoids sun exposure |
| X081 | XPC | Xeroderma Pigmentosum Group C | DNA repair defect | XPC patient monitored for skin cancer |
| X082 | XPD | Xeroderma Pigmentosum Group D | Rare DNA repair disorder | XPD patient under dermatology care |
| X083 | XPE | Xeroderma Pigmentosum Group E | XP subtype | XPE patient advised UV protection |
| X084 | XPF | Xeroderma Pigmentosum Group F | Genetic repair deficiency | XPF monitored for skin lesions |
| X085 | XPG | Xeroderma Pigmentosum Group G | Rare XP variant | XPG patient receives dermatology management |
| X086 | XRS | X-ray Spectroscopy | Technique for elemental analysis | XRS used in bone density research |
| X087 | XRE | X-ray Exposure | Amount of radiation from X-ray | XRE measured during imaging |
| X088 | XTM | X-linked Thrombocytopenia | Platelet deficiency disorder | XTM treated with platelet transfusions |
| X089 | XLD | X-linked Lymphoproliferative Disease | Rare immune disorder | XLD diagnosed in male patient |
| X090 | XPCP | X-linked Primary Ciliary Dyskinesia | Genetic cilia disorder | XPCP patient managed for chronic sinusitis |
| X091 | XFM | X-linked Familial Myopathy | Inherited muscle disorder | XFM confirmed via muscle biopsy |
| X092 | XRA | X-ray Absorptiometry | Imaging for bone mineral density | DXA scan uses XRA |
| X093 | XMR | Xenon Magnetic Resonance | Imaging using xenon | XMR used in brain perfusion study |
| X094 | XBP | X-box Binding Protein | Transcription factor | XBP measured in ER stress analysis |
| X095 | XIC | X-linked Immunodeficiency with Hyper-IgM | Rare immune disorder | XIC patient receives immunoglobulin therapy |
| X096 | XLE | X-linked Lymphedema | Genetic lymphatic disorder | XLE managed with compression therapy |
| X097 | XDT | X-linked Dystrophinopathy | Genetic muscle disorder | XDT diagnosed with genetic testing |
| X098 | XPK | X-linked Pyruvate Kinase Deficiency | Enzyme deficiency disorder | XPK patient treated for hemolytic anemia |
| X099 | XLM | X-linked Myopathy | Genetic muscle disease | XLM evaluated with EMG |
| X100 | XRD | X-ray Diffraction | Technique to analyze crystal structures | XRD used in bone research |
| X101 | XMT | Xenon Multi-Target Imaging | Advanced imaging study | XMT for functional brain mapping |
| X102 | XSI | X-linked Severe Immunodeficiency | Rare immune disorder | XSI treated with bone marrow transplant |
| X103 | XLA | X-linked Agammaglobulinemia | B-cell deficiency | XLA patient receives IVIG therapy |
| X104 | XDR | Extensively Drug-Resistant | Resistant strain of bacteria | XDR-TB managed in isolation |
| X105 | XDP | X-linked Dystonia Parkinsonism | Genetic movement disorder | XDP managed with therapy |
| X106 | XLR | X-linked Recessive | Inheritance pattern | Hemophilia is XLR |
| X107 | XPR | X-linked Progressive Retinal Atrophy | Genetic eye disorder | XPR patient monitored for vision |
| X108 | XSC | X-linked Severe Combined Immunodeficiency | Severe immune disorder | XSC treated with bone marrow transplant |
| X109 | XLD | Xylose Lysine Deoxycholate | Culture medium | XLD agar used to isolate Salmonella |
| X110 | XCR | Xenograft Cardiac Reperfusion | Experimental cardiac procedure | XCR studied in animal models |
| X111 | XIF | X-linked Immunodeficiency Factor | Rare immune disorder | XIF patient monitored for infection |
| X112 | XBM | X-linked Bone Marrow Failure | Hematologic disorder | XBM patient evaluated for transplantation |
| X113 | XFS | X-linked Fragile Skin | Genetic dermatologic disorder | XFS managed for skin fragility |
| X114 | XNG | X-linked Neutropenia Genetic | Rare immune disorder | XNG monitored for infections |
| X115 | XPA | Xeroderma Pigmentosum Group A | UV sensitivity | XPA patient avoids sun exposure |
| X116 | XPC | Xeroderma Pigmentosum Group C | DNA repair defect | XPC patient monitored for cancer |
| X117 | XPD | Xeroderma Pigmentosum Group D | Rare DNA repair disorder | XPD patient under dermatology care |
| X118 | XPE | Xeroderma Pigmentosum Group E | XP subtype | XPE patient advised UV protection |
| X119 | XPF | Xeroderma Pigmentosum Group F | DNA repair deficiency | XPF monitored for skin lesions |
| X120 | XPG | Xeroderma Pigmentosum Group G | Rare XP variant | XPG patient receives dermatology care |
| X121 | XRS | X-ray Spectroscopy | Elemental analysis technique | XRS used in bone density study |
| X122 | XRE | X-ray Exposure | Radiation dose from imaging | XRE monitored during scan |
| X123 | XTM | X-linked Thrombocytopenia | Low platelet disorder | XTM treated with platelet transfusions |
| X124 | XLD | X-linked Lymphoproliferative Disease | Immune disorder | XLD diagnosed after viral infection |
| X125 | XPCP | X-linked Primary Ciliary Dyskinesia | Cilia dysfunction | XPCP patient managed for sinusitis |
| X126 | XFM | X-linked Familial Myopathy | Inherited muscle disorder | XFM confirmed via genetic testing |
| X127 | XRA | X-ray Absorptiometry | Bone density imaging | DXA scan uses XRA |
| X128 | XMR | Xenon Magnetic Resonance | Imaging with xenon gas | XMR performed for brain perfusion |
| X129 | XBP | X-box Binding Protein | Transcription factor | XBP studied in ER stress research |
| X130 | XIC | X-linked Immunodeficiency with Hyper-IgM | Rare immune disorder | XIC patient treated with IVIG |
| X131 | XLE | X-linked Lymphedema | Genetic lymphatic disorder | XLE managed with compression therapy |
| X132 | XDT | X-linked Dystrophinopathy | Genetic muscular disorder | XDT diagnosed via genetic testing |
| X133 | XPK | X-linked Pyruvate Kinase Deficiency | Enzyme deficiency | XPK patient treated for hemolytic anemia |
| X134 | XLM | X-linked Myopathy | Muscle disorder | XLM evaluated via EMG |
| X135 | XRD | X-ray Diffraction | Study of crystal structures | XRD used in bone research |
| X136 | XMT | Xenon Multi-Target Imaging | Advanced imaging | XMT used for functional studies |
| X137 | XSI | X-linked Severe Immunodeficiency | Rare immune disorder | XSI treated with bone marrow transplant |
| X138 | XLA | X-linked Agammaglobulinemia | B-cell deficiency | XLA patient receives IVIG |
| X139 | XDR | Extensively Drug-Resistant | Resistant bacterial strain | XDR-TB managed in isolation |
| X140 | XDP | X-linked Dystonia Parkinsonism | Genetic movement disorder | XDP patient managed with therapy |
| X141 | XLR | X-linked Recessive | Genetic inheritance | Hemophilia is XLR |
| X142 | XPR | X-linked Progressive Retinal Atrophy | Eye disorder | XPR patient monitored for vision loss |
| X143 | XSC | X-linked Severe Combined Immunodeficiency | Immune deficiency | XSC treated with transplant |
| X144 | XLD | Xylose Lysine Deoxycholate | Culture medium | XLD agar isolates Salmonella |
| X145 | XCR | Xenograft Cardiac Reperfusion | Experimental procedure | XCR studied in animals |
| X146 | XIF | X-linked Immunodeficiency Factor | Immune disorder | XIF monitored for infection |
| X147 | XBM | X-linked Bone Marrow Failure | Hematologic disorder | XBM patient considered for transplant |
| X148 | XFS | X-linked Fragile Skin | Dermatologic genetic disorder | XFS patient managed for fragility |
| X149 | XNG | X-linked Neutropenia Genetic | Rare immune disorder | XNG monitored for infections |
| X150 | XPA | Xeroderma Pigmentosum Group A | UV sensitivity | XPA patient avoids sunlight |
| X151 | XPC | Xeroderma Pigmentosum Group C | DNA repair defect | XPC patient monitored for skin cancer |
| X152 | XPD | Xeroderma Pigmentosum Group D | Rare DNA repair disorder | XPD under dermatology care |
| X153 | XPE | Xeroderma Pigmentosum Group E | XP subtype | XPE patient advised UV protection |
| X154 | XPF | Xeroderma Pigmentosum Group F | DNA repair deficiency | XPF monitored for skin lesions |
| X155 | XPG | Xeroderma Pigmentosum Group G | Rare XP variant | XPG receives dermatology care |
| X156 | XRS | X-ray Spectroscopy | Elemental analysis | XRS used in bone density research |
| X157 | XRE | X-ray Exposure | Radiation from X-ray | XRE monitored during scan |
| X158 | XTM | X-linked Thrombocytopenia | Platelet disorder | XTM treated with transfusions |
| X159 | XLD | X-linked Lymphoproliferative Disease | Immune disorder | XLD diagnosed after EBV infection |
| X160 | XPCP | X-linked Primary Ciliary Dyskinesia | Cilia disorder | XPCP managed for chronic sinusitis |
| X161 | XFM | X-linked Familial Myopathy | Muscle disorder | XFM confirmed via genetic testing |
| X162 | XRA | X-ray Absorptiometry | Bone imaging | DXA scan performed |
| X163 | XMR | Xenon Magnetic Resonance | Xenon imaging | XMR performed for brain perfusion |
| X164 | XBP | X-box Binding Protein | Transcription factor | XBP analyzed in ER stress |
| X165 | XIC | X-linked Immunodeficiency with Hyper-IgM | Rare immune disorder | XIC patient treated with IVIG |
| X166 | XLE | X-linked Lymphedema | Lymphatic disorder | XLE managed with therapy |
| X167 | XDT | X-linked Dystrophinopathy | Muscular disorder | XDT diagnosed via genetic testing |
| X168 | XPK | X-linked Pyruvate Kinase Deficiency | Enzyme deficiency | XPK patient treated for anemia |
| X169 | XLM | X-linked Myopathy | Genetic muscle disease | XLM evaluated via EMG |
| X170 | XRD | X-ray Diffraction | Crystal structure analysis | XRD used in bone studies |
| X171 | XMT | Xenon Multi-Target Imaging | Functional imaging | XMT used for brain mapping |
| X172 | XSI | X-linked Severe Immunodeficiency | Rare immune disorder | XSI treated with bone marrow transplant |
| X173 | XLA | X-linked Agammaglobulinemia | B-cell deficiency | XLA patient receives IVIG therapy |
| X174 | XDR | Extensively Drug-Resistant | Resistant bacterial strain | XDR-TB isolated and treated |
| X175 | XDP | X-linked Dystonia Parkinsonism | Movement disorder | XDP patient managed with therapy |
| X176 | XLR | X-linked Recessive | Genetic inheritance | Hemophilia follows XLR pattern |
| X177 | XPR | X-linked Progressive Retinal Atrophy | Eye disease | XPR monitored for vision deterioration |
| X178 | XSC | X-linked Severe Combined Immunodeficiency | Immune deficiency | XSC treated with transplant |
| X179 | XLD | Xylose Lysine Deoxycholate | Culture medium | XLD agar isolates Salmonella |
| X180 | XCR | Xenograft Cardiac Reperfusion | Experimental procedure | XCR studied in animal models |
| X181 | XIF | X-linked Immunodeficiency Factor | Immune disorder | XIF patient monitored for infections |
| X182 | XBM | X-linked Bone Marrow Failure | Hematologic disorder | XBM patient evaluated for transplant |
| X183 | XFS | X-linked Fragile Skin | Dermatologic disorder | XFS patient managed for fragility |
| X184 | XNG | X-linked Neutropenia Genetic | Immune deficiency | XNG monitored for infections |
| X185 | XPA | Xeroderma Pigmentosum Group A | UV sensitivity | XPA avoids sunlight |
| X186 | XPC | Xeroderma Pigmentosum Group C | DNA repair defect | XPC monitored for skin cancer |
| X187 | XPD | Xeroderma Pigmentosum Group D | DNA repair disorder | XPD under dermatology care |
| X188 | XPE | Xeroderma Pigmentosum Group E | XP subtype | XPE advised strict UV protection |
| X189 | XPF | Xeroderma Pigmentosum Group F | DNA repair deficiency | XPF monitored for skin lesions |
| X190 | XPG | Xeroderma Pigmentosum Group G | Rare XP variant | XPG receives dermatology care |
| X191 | XRS | X-ray Spectroscopy | Elemental analysis technique | XRS used in bone mineral studies |
| X192 | XRE | X-ray Exposure | Radiation received | XRE monitored during imaging |
| X193 | XTM | X-linked Thrombocytopenia | Platelet disorder | XTM treated with transfusions |
| X194 | XLD | X-linked Lymphoproliferative Disease | Immune disorder | XLD diagnosed after viral infection |
| X195 | XPCP | X-linked Primary Ciliary Dyskinesia | Cilia disorder | XPCP managed for sinusitis |
| X196 | XFM | X-linked Familial Myopathy | Muscle disorder | XFM confirmed via genetic testing |
| X197 | XRA | X-ray Absorptiometry | Bone imaging | DXA scan performed |
| X198 | XMR | Xenon Magnetic Resonance | Functional imaging | XMR performed for brain perfusion |
| X199 | XBP | X-box Binding Protein | Transcription factor | XBP analyzed in ER stress studies |
| X200 | XIC | X-linked Immunodeficiency with Hyper-IgM | Rare immune disorder | XIC treated with IVIG therapy |